6" SS EXHAUST STACK

[Rob Robinson]

Kurt two years ago up here in BC I saw a millenium Bluebird parked across from me at my home RV park that had two stacks. The owners were only visiting and must have been out sight seeing most of the time because I never did see them. I sure would have like to see behind their engine bay.

2008/11/1 Kurt Horvath <"kguns@hughes.net">

I guess you could or go to a large 8" single , bit the chrome shops
sell them for outrageous prices---$692.00
http://www.iowa80.com/DirectionsWEB/webc...splay.php?

itemid=74151
Kurt Horvath
95 PT 42
10AC

In "WanderlodgeForum%40yahoogroups.com", David Brady wrote:
>
> Now we're talking. Can you fit two stacks back there? I'm

> serious. This will be an improvement in performance. Two stacks
> will dramatically reduce backpressure, which will result in
> lower turbo pyrometer temps, and will allow more boost and
> more power. A single 5 inch, as compared to the stock 6"

> will do the reverse.
>
> David
> '02 LXi, NC
>
>
> Kurt Horvath wrote:
> >
> > One pipe from the turbo then splits to two stacks.
> >
> > Kurt Horvath

> > 95 PT 42
> > 10AC
> >
> > --- In "WanderlodgeForum%40yahoogroups.com"
> > , David Brady

> > wrote:
> > >
> > > But doesn't the trucking industry run dual exhausts?
> > >
> > > David Brady
> > > '02 LXi, NC
> > >
> > > Pete Masterson wrote:

> > > >
> > > > Having recently replaced my muffler (at great expense) -- had
I
> > to do
> > > > it over again, I'd have switched over to a 5" system from

turbo to
> > > > stack. As others have stated, it's 5" at the turbo outlet and
the
> > > > standard in the heavy truck industry is 5".
> > > >
> > > > The only performance difference I notice (between the old

blown
> > out
> > > > muffler and the new one) is that the exhaust-type Jake brake
> > seems to
> > > > be slightly less effective.
> > > >
> > > > Pete Masterson

> > > > '95 Blue Bird Wanderlodge WBDA 42
> > > > aeonix1@
> > > > On the road at Hohenwald, TN (Natchez Trace Parkway)

> > > >
> > > > On Oct 31, 2008, at 11:24 PM, Kurt Horvath wrote:
> > > > > <snip>
> > > > > For the last four weeks I have queried Detroit Diesel,

Custom
> > Exhaust
> > > > > Fabricators, Several OEM Exhaust Mfg.'s, Marine Exhaust
> > Engineers &
> > > > > Fabricators, My BB Guru, and anyone else that would lend an

> > ear, and
> > > > > no one has expressed any apprehension or regard in the
respect
> > to a
> > > > > 5" exhaust system. In fact all parties expressed their

surprise
> > in
> > > > > respect as to why the system would change size at the
muffler.
> > > > >
> > > > > Several owners have modified their systems to 5" from end to

> > end, and
> > > > > have seen no change in performance. Positive or negative, In
> > general
> > > > > it was just a matter of convenience in acquiring parts, I
won't

> > get
> > > > > into that. That has recently been beaten to death at the
> > expense of
> > > > > all parties involved
> > > > >
> > > >

> > > >
> > > > ----------------------------------------------------------
> > ------
> > > >
> > > > Internal Virus Database is out-of-date.
> > > > Checked by AVG.

> > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release
Date:
> > 10/9/2008 12:00 AM
> > > >
> > >
> >
> >
> > ----------------------------------------------------------

------
> >
> > Internal Virus Database is out-of-date.
> > Checked by AVG.
> > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release Date:
10/9/2008 12:00 AM
> >
>

--
Rob, Sue & Merlin Robinson

94 WLWB

[David Brady]

Now we're talking. Can you fit two stacks back there? I'm

serious. This will be an improvement in performance. Two stacks

will dramatically reduce backpressure, which will result in

lower turbo pyrometer temps, and will allow more boost and

more power. A single 5 inch, as compared to the stock 6"

will do the reverse.



David

'02 LXi, NC





Kurt Horvath wrote:

One pipe from the turbo then splits to two stacks.



Kurt Horvath

95 PT 42

10AC



--- In "WanderlodgeForum%40yahoogroups.com",
David Brady "dmb993@..."

wrote:

>

> But doesn't the trucking industry run dual exhausts?

>

> David Brady

> '02 LXi, NC

>

> Pete Masterson wrote:

> >

> > Having recently replaced my muffler (at great expense) -- had
I

to do

> > it over again, I'd have switched over to a 5" system from
turbo to

> > stack. As others have stated, it's 5" at the turbo outlet and
the

> > standard in the heavy truck industry is 5".

> >

> > The only performance difference I notice (between the old
blown

out

> > muffler and the new one) is that the exhaust-type Jake brake

seems to

> > be slightly less effective.

> >

> > Pete Masterson

> > '95 Blue Bird Wanderlodge WBDA 42

> > aeonix1@... <"aeonix1%"40mac.com>

> > On the road at Hohenwald, TN (Natchez Trace Parkway)

> >

> > On Oct 31, 2008, at 11:24 PM, Kurt Horvath wrote:

> > > <snip>

> > > For the last four weeks I have queried Detroit Diesel,
Custom

Exhaust

> > > Fabricators, Several OEM Exhaust Mfg.'s, Marine Exhaust

Engineers &

> > > Fabricators, My BB Guru, and anyone else that would lend
an

ear, and

> > > no one has expressed any apprehension or regard in the
respect

to a

> > > 5" exhaust system. In fact all parties expressed their
surprise

in

> > > respect as to why the system would change size at the
muffler.

> > >

> > > Several owners have modified their systems to 5" from
end to

end, and

> > > have seen no change in performance. Positive or
negative, In

general

> > > it was just a matter of convenience in acquiring parts,
I won't

get

> > > into that. That has recently been beaten to death at the


expense of

> > > all parties involved

> > >

> >

> >

> > ----------------------------------------------------------

------

> >

> > Internal Virus Database is out-of-date.

> > Checked by AVG.

> > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release
Date:

10/9/2008 12:00 AM

> >

>

Internal Virus Database is out-of-date.

Checked by AVG. Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release Date: 10/9/2008 12:00 AM

[Gregory OConnor]

Kurt, I dont think big thick straight pipes were mounted on those
rigs for performance or efficiency. its all looks and compensation.
Bet every trucker with 8 inch stacks also drive a 4x4 requiring a
step latter to get into.
Greg 94pt,toyota pickup

--- In WanderlodgeForum@yahoogroups.com, "Rob Robinson"
wrote:
>
> Kurt two years ago up here in BC I saw a millenium Bluebird parked
across
> from me at my home RV park that had two stacks. The owners were only
> visiting and must have been out sight seeing most of the time
because I
> never did see them. I sure would have like to see behind their
engine bay.
>
> 2008/11/1 Kurt Horvath
>
> >
> > I guess you could or go to a large 8" single , bit the chrome
shops
> > sell them for outrageous prices---$692.00
> > http://www.iowa80.com/DirectionsWEB/webc...splay.php?
> > itemid=74151
> > Kurt Horvath
> > 95 PT 42
> > 10AC
> >
> > In WanderlodgeForum@yahoogroups.com 40yahoogroups.com>,
> > David Brady wrote:
> > >
> > > Now we're talking. Can you fit two stacks back there? I'm
> > > serious. This will be an improvement in performance. Two stacks
> > > will dramatically reduce backpressure, which will result in
> > > lower turbo pyrometer temps, and will allow more boost and
> > > more power. A single 5 inch, as compared to the stock 6"
> > > will do the reverse.
> > >
> > > David
> > > '02 LXi, NC
> > >
> > >
> > > Kurt Horvath wrote:
> > > >
> > > > One pipe from the turbo then splits to two stacks.
> > > >
> > > > Kurt Horvath
> > > > 95 PT 42
> > > > 10AC
> > > >
> > > > --- In WanderlodgeForum@yahoogroups.com 40yahoogroups.com>
> > > > 2540yahoogroups.com>>,
> > David Brady
> > > > wrote:
> > > > >
> > > > > But doesn't the trucking industry run dual exhausts?
> > > > >
> > > > > David Brady
> > > > > '02 LXi, NC
> > > > >
> > > > > Pete Masterson wrote:
> > > > > >
> > > > > > Having recently replaced my muffler (at great expense) --
had
> > I
> > > > to do
> > > > > > it over again, I'd have switched over to a 5" system from
> > turbo to
> > > > > > stack. As others have stated, it's 5" at the turbo outlet
and
> > the
> > > > > > standard in the heavy truck industry is 5".
> > > > > >
> > > > > > The only performance difference I notice (between the old
> > blown
> > > > out
> > > > > > muffler and the new one) is that the exhaust-type Jake
brake
> > > > seems to
> > > > > > be slightly less effective.
> > > > > >
> > > > > > Pete Masterson
> > > > > > '95 Blue Bird Wanderlodge WBDA 42
> > > > > > aeonix1@ >
> > > > > > On the road at Hohenwald, TN (Natchez Trace Parkway)
> > > > > >
> > > > > > On Oct 31, 2008, at 11:24 PM, Kurt Horvath wrote:
> > > > > > > <snip>
> > > > > > > For the last four weeks I have queried Detroit Diesel,
> > Custom
> > > > Exhaust
> > > > > > > Fabricators, Several OEM Exhaust Mfg.'s, Marine Exhaust
> > > > Engineers &
> > > > > > > Fabricators, My BB Guru, and anyone else that would
lend an
> > > > ear, and
> > > > > > > no one has expressed any apprehension or regard in the
> > respect
> > > > to a
> > > > > > > 5" exhaust system. In fact all parties expressed their
> > surprise
> > > > in
> > > > > > > respect as to why the system would change size at the
> > muffler.
> > > > > > >
> > > > > > > Several owners have modified their systems to 5" from
end to
> > > > end, and
> > > > > > > have seen no change in performance. Positive or
negative, In
> > > > general
> > > > > > > it was just a matter of convenience in acquiring parts,
I
> > won't
> > > > get
> > > > > > > into that. That has recently been beaten to death at the
> > > > expense of
> > > > > > > all parties involved
> > > > > > >
> > > > > >
> > > > > >
> > > > > > ----------------------------------------------------------
> > > > ------
> > > > > >
> > > > > > Internal Virus Database is out-of-date.
> > > > > > Checked by AVG.
> > > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release
> > Date:
> > > > 10/9/2008 12:00 AM
> > > > > >
> > > > >
> > > >
> > > >
> > > > ----------------------------------------------------------
> > ------
> > > >
> > > > Internal Virus Database is out-of-date.
> > > > Checked by AVG.
> > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release
Date:
> > 10/9/2008 12:00 AM
> > > >
> > >
> >
> >
> >
>
>
>
> --
> Rob, Sue & Merlin Robinson
> 94 WLWB
>

[Kurt Horvath]

Ernie,

Don't worry about floorcovering you'll be the first to know--- I do
have a problem with the tile floors. Mine seem to be cracking more as
time goes on, so sooner or latter we'll get together and fix it right!

Kurt Horvath
95 PT 42
10AC

MMMMMMMMMMMmmmmmmmmmm in floor heating, I love warm tile in the
mornings

In WanderlodgeForum@yahoogroups.com, erniecarpet@... wrote:
>
> What result would be if you went from a 6" exhaust to a 5"
muffler ? I know
> when Ron Marabito replaced his muffler, I believe 6 " stainless was
either
> unobtainum or over priced. It took us a day to install the flex
pipes and
> muffler. Maybe it was the novices doing the work?~ Ask me about
floorcovering.
>
> Ernie Ekberg
> 83PT40
> Weatherford, Texas
>
> **************Plan your next getaway with AOL Travel. Check out
Today's Hot
> 5 Travel Deals!
> (http://pr.atwola.com/promoclk/100000075x...71803/aol?
redir=http://travel.aol.com/discount-travel?nc...av00000001)
>

[Kurt Horvath]

Gregg,

Yea, ALL SHOW AND NO GO!-

David,

I know what you're after but the pipes I described are basically
straight pipes with a very well designed sound surprising ceramic
coating that does not restrict flow. But won't be as harsh as a
straight pipe. Cost is nominal at $250.00 Vs $200 for a straight pipe

Kurt Horvath
95 PT 42
10AC


@yahoogroups.com, "Gregory OConnor" wrote:
>
> Kurt, I dont think big thick straight pipes were mounted on those
> rigs for performance or efficiency. its all looks and compensation.
> Bet every trucker with 8 inch stacks also drive a 4x4 requiring a
> step latter to get into.
> Greg 94pt,toyota pickup
>
> --- In WanderlodgeForum@yahoogroups.com, "Rob Robinson"
> wrote:
> >
> > Kurt two years ago up here in BC I saw a millenium Bluebird
parked
> across
> > from me at my home RV park that had two stacks. The owners were
only
> > visiting and must have been out sight seeing most of the time
> because I
> > never did see them. I sure would have like to see behind their
> engine bay.
> >
> > 2008/11/1 Kurt Horvath
> >
> > >
> > > I guess you could or go to a large 8" single , bit the chrome
> shops
> > > sell them for outrageous prices---$692.00
> > > http://www.iowa80.com/DirectionsWEB/webc...splay.php?
> > > itemid=74151
> > > Kurt Horvath
> > > 95 PT 42
> > > 10AC
> > >
> > > In WanderlodgeForum@yahoogroups.com > 40yahoogroups.com>,
> > > David Brady wrote:
> > > >
> > > > Now we're talking. Can you fit two stacks back there? I'm
> > > > serious. This will be an improvement in performance. Two
stacks
> > > > will dramatically reduce backpressure, which will result in
> > > > lower turbo pyrometer temps, and will allow more boost and
> > > > more power. A single 5 inch, as compared to the stock 6"
> > > > will do the reverse.
> > > >
> > > > David
> > > > '02 LXi, NC
> > > >
> > > >
> > > > Kurt Horvath wrote:
> > > > >
> > > > > One pipe from the turbo then splits to two stacks.
> > > > >
> > > > > Kurt Horvath
> > > > > 95 PT 42
> > > > > 10AC
> > > > >
> > > > > --- In WanderlodgeForum@yahoogroups.com > 40yahoogroups.com>
> > > > > > 2540yahoogroups.com>>,
> > > David Brady
> > > > > wrote:
> > > > > >
> > > > > > But doesn't the trucking industry run dual exhausts?
> > > > > >
> > > > > > David Brady
> > > > > > '02 LXi, NC
> > > > > >
> > > > > > Pete Masterson wrote:
> > > > > > >
> > > > > > > Having recently replaced my muffler (at great expense) -
-
> had
> > > I
> > > > > to do
> > > > > > > it over again, I'd have switched over to a 5" system
from
> > > turbo to
> > > > > > > stack. As others have stated, it's 5" at the turbo
outlet
> and
> > > the
> > > > > > > standard in the heavy truck industry is 5".
> > > > > > >
> > > > > > > The only performance difference I notice (between the
old
> > > blown
> > > > > out
> > > > > > > muffler and the new one) is that the exhaust-type Jake
> brake
> > > > > seems to
> > > > > > > be slightly less effective.
> > > > > > >
> > > > > > > Pete Masterson
> > > > > > > '95 Blue Bird Wanderlodge WBDA 42
> > > > > > > aeonix1@ 2540mac.com>>
> > > > > > > On the road at Hohenwald, TN (Natchez Trace Parkway)
> > > > > > >
> > > > > > > On Oct 31, 2008, at 11:24 PM, Kurt Horvath wrote:
> > > > > > > > <snip>
> > > > > > > > For the last four weeks I have queried Detroit Diesel,
> > > Custom
> > > > > Exhaust
> > > > > > > > Fabricators, Several OEM Exhaust Mfg.'s, Marine
Exhaust
> > > > > Engineers &
> > > > > > > > Fabricators, My BB Guru, and anyone else that would
> lend an
> > > > > ear, and
> > > > > > > > no one has expressed any apprehension or regard in the
> > > respect
> > > > > to a
> > > > > > > > 5" exhaust system. In fact all parties expressed their
> > > surprise
> > > > > in
> > > > > > > > respect as to why the system would change size at the
> > > muffler.
> > > > > > > >
> > > > > > > > Several owners have modified their systems to 5" from
> end to
> > > > > end, and
> > > > > > > > have seen no change in performance. Positive or
> negative, In
> > > > > general
> > > > > > > > it was just a matter of convenience in acquiring
parts,
> I
> > > won't
> > > > > get
> > > > > > > > into that. That has recently been beaten to death at
the
> > > > > expense of
> > > > > > > > all parties involved
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --------------------------------------------------------
--
> > > > > ------
> > > > > > >
> > > > > > > Internal Virus Database is out-of-date.
> > > > > > > Checked by AVG.
> > > > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 -
Release
> > > Date:
> > > > > 10/9/2008 12:00 AM
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > ----------------------------------------------------------
> > > ------
> > > > >
> > > > > Internal Virus Database is out-of-date.
> > > > > Checked by AVG.
> > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release
> Date:
> > > 10/9/2008 12:00 AM
> > > > >
> > > >
> > >
> > >
> > >
> >
> >
> >
> > --
> > Rob, Sue & Merlin Robinson
> > 94 WLWB
> >
>

[ronmarabito2002]

I've not noticed any significant change in pyrometer temperatures. If
they are there, I would have to have a more accurate instrument.

R.E. (Ron) Marabito, Dallas, TX 92WB40

--- In WanderlodgeForum@yahoogroups.com, David Brady wrote:
>
> But Kurt, it's only 5 inches, correct? The turbo dumps into
> 5 inches but the gases are hot, low density, low pressure and
> moving fast. As the exhaust progresses down the exhaust
> system the air cools, becomes more dense, and back pressure
> increases. If way down the exhaust you go from 6 to 5 your
> increasing the backpressure. This will make the exhaust run
> hotter at the turbo, high turbo pyrometer, less turbo velocity,
> and a reduction in performance. 5 inches is 20 square inches,
> while 6 provides 30, a whopping 50% improvement. I'm gonna
> stick with the 6 or figure out a way to stuff 2 five inch stacks
> in the corner of the bus. If you take it down to 5 inches, let
> us know if your turbo pyrometer shows excessive temps on
> those long 6% grades. I think the key is eliminating/reducing
> back pressure.
>
> Do you have a web page for the 5" stack that you'd like to
> use?
>
> Check this out: http://dieselinjection.net/BRUCE/articles.html
>
>
> David
> '02 LXi, NC
>
> Kurt Horvath wrote:
> >
> > Gregg,
> >
> > Yea, ALL SHOW AND NO GO!-
> >
> > David,
> >
> > I know what you're after but the pipes I described are basically
> > straight pipes with a very well designed sound surprising ceramic
> > coating that does not restrict flow. But won't be as harsh as a
> > straight pipe. Cost is nominal at $250.00 Vs $200 for a straight pipe
> >
> > Kurt Horvath
> > 95 PT 42
> > 10AC
> >
> > @yahoogroups.com, "Gregory OConnor" wrote:
> > >
> > > Kurt, I dont think big thick straight pipes were mounted on those
> > > rigs for performance or efficiency. its all looks and compensation.
> > > Bet every trucker with 8 inch stacks also drive a 4x4 requiring a
> > > step latter to get into.
> > > Greg 94pt,toyota pickup
> > >
> > > --- In WanderlodgeForum@yahoogroups.com
> > , "Rob Robinson"
> > > wrote:
> > > >
> > > > Kurt two years ago up here in BC I saw a millenium Bluebird
> > parked
> > > across
> > > > from me at my home RV park that had two stacks. The owners were
> > only
> > > > visiting and must have been out sight seeing most of the time
> > > because I
> > > > never did see them. I sure would have like to see behind their
> > > engine bay.
> > > >
> > > > 2008/11/1 Kurt Horvath
> > > >
> > > > >
> > > > > I guess you could or go to a large 8" single , bit the chrome
> > > shops
> > > > > sell them for outrageous prices---$692.00
> > > > > http://www.iowa80.com/DirectionsWEB/webc...splay.php?
> > <http://www.iowa80.com/DirectionsWEB/webc...splay.php?>
> > > > > itemid=74151
> > > > > Kurt Horvath
> > > > > 95 PT 42
> > > > > 10AC
> > > > >
> > > > > In WanderlodgeForum@yahoogroups.com
> > > > > 40yahoogroups.com>,
> > > > > David Brady wrote:
> > > > > >
> > > > > > Now we're talking. Can you fit two stacks back there? I'm
> > > > > > serious. This will be an improvement in performance. Two
> > stacks
> > > > > > will dramatically reduce backpressure, which will result in
> > > > > > lower turbo pyrometer temps, and will allow more boost and
> > > > > > more power. A single 5 inch, as compared to the stock 6"
> > > > > > will do the reverse.
> > > > > >
> > > > > > David
> > > > > > '02 LXi, NC
> > > > > >
> > > > > >
> > > > > > Kurt Horvath wrote:
> > > > > > >
> > > > > > > One pipe from the turbo then splits to two stacks.
> > > > > > >
> > > > > > > Kurt Horvath
> > > > > > > 95 PT 42
> > > > > > > 10AC
> > > > > > >
> > > > > > > --- In WanderlodgeForum@yahoogroups.com
> > > > > 40yahoogroups.com>
> > > > > > > > > > 2540yahoogroups.com>>,
> > > > > David Brady
> > > > > > > wrote:
> > > > > > > >
> > > > > > > > But doesn't the trucking industry run dual exhausts?
> > > > > > > >
> > > > > > > > David Brady
> > > > > > > > '02 LXi, NC
> > > > > > > >
> > > > > > > > Pete Masterson wrote:
> > > > > > > > >
> > > > > > > > > Having recently replaced my muffler (at great expense) -
> > -
> > > had
> > > > > I
> > > > > > > to do
> > > > > > > > > it over again, I'd have switched over to a 5" system
> > from
> > > > > turbo to
> > > > > > > > > stack. As others have stated, it's 5" at the turbo
> > outlet
> > > and
> > > > > the
> > > > > > > > > standard in the heavy truck industry is 5".
> > > > > > > > >
> > > > > > > > > The only performance difference I notice (between the
> > old
> > > > > blown
> > > > > > > out
> > > > > > > > > muffler and the new one) is that the exhaust-type Jake
> > > brake
> > > > > > > seems to
> > > > > > > > > be slightly less effective.
> > > > > > > > >
> > > > > > > > > Pete Masterson
> > > > > > > > > '95 Blue Bird Wanderlodge WBDA 42
> > > > > > > > > aeonix1@ > > 2540mac.com>>
> > > > > > > > > On the road at Hohenwald, TN (Natchez Trace Parkway)
> > > > > > > > >
> > > > > > > > > On Oct 31, 2008, at 11:24 PM, Kurt Horvath wrote:
> > > > > > > > > > <snip>
> > > > > > > > > > For the last four weeks I have queried Detroit Diesel,
> > > > > Custom
> > > > > > > Exhaust
> > > > > > > > > > Fabricators, Several OEM Exhaust Mfg.'s, Marine
> > Exhaust
> > > > > > > Engineers &
> > > > > > > > > > Fabricators, My BB Guru, and anyone else that would
> > > lend an
> > > > > > > ear, and
> > > > > > > > > > no one has expressed any apprehension or regard in the
> > > > > respect
> > > > > > > to a
> > > > > > > > > > 5" exhaust system. In fact all parties expressed their
> > > > > surprise
> > > > > > > in
> > > > > > > > > > respect as to why the system would change size at the
> > > > > muffler.
> > > > > > > > > >
> > > > > > > > > > Several owners have modified their systems to 5" from
> > > end to
> > > > > > > end, and
> > > > > > > > > > have seen no change in performance. Positive or
> > > negative, In
> > > > > > > general
> > > > > > > > > > it was just a matter of convenience in acquiring
> > parts,
> > > I
> > > > > won't
> > > > > > > get
> > > > > > > > > > into that. That has recently been beaten to death at
> > the
> > > > > > > expense of
> > > > > > > > > > all parties involved
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > --------------------------------------------------------
> > --
> > > > > > > ------
> > > > > > > > >
> > > > > > > > > Internal Virus Database is out-of-date.
> > > > > > > > > Checked by AVG.
> > > > > > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 -
> > Release
> > > > > Date:
> > > > > > > 10/9/2008 12:00 AM
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > ----------------------------------------------------------
> > > > > ------
> > > > > > >
> > > > > > > Internal Virus Database is out-of-date.
> > > > > > > Checked by AVG.
> > > > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release
> > > Date:
> > > > > 10/9/2008 12:00 AM
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Rob, Sue & Merlin Robinson
> > > > 94 WLWB
> > > >
> > >
> >
> >
> >
------------------------------------------------------------------------
> >
> > Internal Virus Database is out-of-date.
> > Checked by AVG.
> > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release Date:
10/9/2008 12:00 AM
> >
>

[Gregory OConnor]

wonder what backpressure is mathed into variables that trigger
checkenigne codes like 'turbo over speed'??? just sounds like you
will need todo some new math in the computers. backpressure and pyro
heat are values tracked with tier3 constructon metal. then you got
progression of torque to deal with. I tuned down a dump truck from
500hp to 315 because it would spinn em on gravel then catch traction
resulting n carrierbearing and ringgear damage.
Got a fix it for a stack under 12.5 foot tall????? then one for wrong
discharge angle????? both easy fix but on the hight, I kept a loose
joint to keep from doing manifold damage with tree limbs hitting that
exposed. its a good idea to keep it close to the goat height and have
a banded union just under the roof deck.

Greg94ptCa

--- In WanderlodgeForum@yahoogroups.com, David Brady
wrote:
>
> But Kurt, it's only 5 inches, correct? The turbo dumps into
> 5 inches but the gases are hot, low density, low pressure and
> moving fast. As the exhaust progresses down the exhaust
> system the air cools, becomes more dense, and back pressure
> increases. If way down the exhaust you go from 6 to 5 your
> increasing the backpressure. This will make the exhaust run
> hotter at the turbo, high turbo pyrometer, less turbo velocity,
> and a reduction in performance. 5 inches is 20 square inches,
> while 6 provides 30, a whopping 50% improvement. I'm gonna
> stick with the 6 or figure out a way to stuff 2 five inch stacks
> in the corner of the bus. If you take it down to 5 inches, let
> us know if your turbo pyrometer shows excessive temps on
> those long 6% grades. I think the key is eliminating/reducing
> back pressure.
>
> Do you have a web page for the 5" stack that you'd like to
> use?
>
> Check this out: http://dieselinjection.net/BRUCE/articles.html
>
>
> David
> '02 LXi, NC
>
> Kurt Horvath wrote:
> >
> > Gregg,
> >
> > Yea, ALL SHOW AND NO GO!-
> >
> > David,
> >
> > I know what you're after but the pipes I described are basically
> > straight pipes with a very well designed sound surprising ceramic
> > coating that does not restrict flow. But won't be as harsh as a
> > straight pipe. Cost is nominal at $250.00 Vs $200 for a straight
pipe
> >
> > Kurt Horvath
> > 95 PT 42
> > 10AC
> >
> > @yahoogroups.com, "Gregory OConnor" wrote:
> > >
> > > Kurt, I dont think big thick straight pipes were mounted on
those
> > > rigs for performance or efficiency. its all looks and
compensation.
> > > Bet every trucker with 8 inch stacks also drive a 4x4 requiring
a
> > > step latter to get into.
> > > Greg 94pt,toyota pickup
> > >
> > > --- In WanderlodgeForum@yahoogroups.com
> > , "Rob Robinson"
> > > wrote:
> > > >
> > > > Kurt two years ago up here in BC I saw a millenium Bluebird
> > parked
> > > across
> > > > from me at my home RV park that had two stacks. The owners
were
> > only
> > > > visiting and must have been out sight seeing most of the time
> > > because I
> > > > never did see them. I sure would have like to see behind their
> > > engine bay.
> > > >
> > > > 2008/11/1 Kurt Horvath
> > > >
> > > > >
> > > > > I guess you could or go to a large 8" single , bit the
chrome
> > > shops
> > > > > sell them for outrageous prices---$692.00
> > > > >
http://www.iowa80.com/DirectionsWEB/webc...splay.php?
> > <http://www.iowa80.com/DirectionsWEB/webc...splay.php?>
> > > > > itemid=74151
> > > > > Kurt Horvath
> > > > > 95 PT 42
> > > > > 10AC
> > > > >
> > > > > In WanderlodgeForum@yahoogroups.com
> > > > > 40yahoogroups.com>,
> > > > > David Brady wrote:
> > > > > >
> > > > > > Now we're talking. Can you fit two stacks back there? I'm
> > > > > > serious. This will be an improvement in performance. Two
> > stacks
> > > > > > will dramatically reduce backpressure, which will result
in
> > > > > > lower turbo pyrometer temps, and will allow more boost and
> > > > > > more power. A single 5 inch, as compared to the stock 6"
> > > > > > will do the reverse.
> > > > > >
> > > > > > David
> > > > > > '02 LXi, NC
> > > > > >
> > > > > >
> > > > > > Kurt Horvath wrote:
> > > > > > >
> > > > > > > One pipe from the turbo then splits to two stacks.
> > > > > > >
> > > > > > > Kurt Horvath
> > > > > > > 95 PT 42
> > > > > > > 10AC
> > > > > > >
> > > > > > > --- In WanderlodgeForum@yahoogroups.com
> > > > > 40yahoogroups.com>
> > > > > > > 40yahoogroups.com > > > 2540yahoogroups.com>>,
> > > > > David Brady
> > > > > > > wrote:
> > > > > > > >
> > > > > > > > But doesn't the trucking industry run dual exhausts?
> > > > > > > >
> > > > > > > > David Brady
> > > > > > > > '02 LXi, NC
> > > > > > > >
> > > > > > > > Pete Masterson wrote:
> > > > > > > > >
> > > > > > > > > Having recently replaced my muffler (at great
expense) -
> > -
> > > had
> > > > > I
> > > > > > > to do
> > > > > > > > > it over again, I'd have switched over to a 5" system
> > from
> > > > > turbo to
> > > > > > > > > stack. As others have stated, it's 5" at the turbo
> > outlet
> > > and
> > > > > the
> > > > > > > > > standard in the heavy truck industry is 5".
> > > > > > > > >
> > > > > > > > > The only performance difference I notice (between
the
> > old
> > > > > blown
> > > > > > > out
> > > > > > > > > muffler and the new one) is that the exhaust-type
Jake
> > > brake
> > > > > > > seems to
> > > > > > > > > be slightly less effective.
> > > > > > > > >
> > > > > > > > > Pete Masterson
> > > > > > > > > '95 Blue Bird Wanderlodge WBDA 42
> > > > > > > > > aeonix1@ > > 2540mac.com>>
> > > > > > > > > On the road at Hohenwald, TN (Natchez Trace Parkway)
> > > > > > > > >
> > > > > > > > > On Oct 31, 2008, at 11:24 PM, Kurt Horvath wrote:
> > > > > > > > > > <snip>
> > > > > > > > > > For the last four weeks I have queried Detroit
Diesel,
> > > > > Custom
> > > > > > > Exhaust
> > > > > > > > > > Fabricators, Several OEM Exhaust Mfg.'s, Marine
> > Exhaust
> > > > > > > Engineers &
> > > > > > > > > > Fabricators, My BB Guru, and anyone else that
would
> > > lend an
> > > > > > > ear, and
> > > > > > > > > > no one has expressed any apprehension or regard
in the
> > > > > respect
> > > > > > > to a
> > > > > > > > > > 5" exhaust system. In fact all parties expressed
their
> > > > > surprise
> > > > > > > in
> > > > > > > > > > respect as to why the system would change size at
the
> > > > > muffler.
> > > > > > > > > >
> > > > > > > > > > Several owners have modified their systems to 5"
from
> > > end to
> > > > > > > end, and
> > > > > > > > > > have seen no change in performance. Positive or
> > > negative, In
> > > > > > > general
> > > > > > > > > > it was just a matter of convenience in acquiring
> > parts,
> > > I
> > > > > won't
> > > > > > > get
> > > > > > > > > > into that. That has recently been beaten to death
at
> > the
> > > > > > > expense of
> > > > > > > > > > all parties involved
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > ----------------------------------------------------
----
> > --
> > > > > > > ------
> > > > > > > > >
> > > > > > > > > Internal Virus Database is out-of-date.
> > > > > > > > > Checked by AVG.
> > > > > > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 -
> > Release
> > > > > Date:
> > > > > > > 10/9/2008 12:00 AM
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --------------------------------------------------------
--
> > > > > ------
> > > > > > >
> > > > > > > Internal Virus Database is out-of-date.
> > > > > > > Checked by AVG.
> > > > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 -
Release
> > > Date:
> > > > > 10/9/2008 12:00 AM
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Rob, Sue & Merlin Robinson
> > > > 94 WLWB
> > > >
> > >
> >
> >
> > ------------------------------------------------------------------
------
> >
> > Internal Virus Database is out-of-date.
> > Checked by AVG.
> > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release Date:
10/9/2008 12:00 AM
> >
>

[David Brady]

But Kurt, it's only 5 inches, correct? The turbo dumps into

5 inches but the gases are hot, low density, low pressure and

moving fast. As the exhaust progresses down the exhaust

system the air cools, becomes more dense, and back pressure

increases. If way down the exhaust you go from 6 to 5 your

increasing the backpressure. This will make the exhaust run

hotter at the turbo, high turbo pyrometer, less turbo velocity,

and a reduction in performance. 5 inches is 20 square inches,

while 6 provides 30, a whopping 50% improvement. I'm gonna

stick with the 6 or figure out a way to stuff 2 five inch stacks

in the corner of the bus. If you take it down to 5 inches, let

us know if your turbo pyrometer shows excessive temps on

those long 6% grades. I think the key is eliminating/reducing

back pressure.



Do you have a web page for the 5" stack that you'd like to

use?



Check this out: http://dieselinjection.net/BRUCE/articles.html





David

'02 LXi, NC



Kurt Horvath wrote:

Gregg,



Yea, ALL SHOW AND NO GO!-



David,



I know what you're after but the pipes I described are basically

straight pipes with a very well designed sound surprising ceramic

coating that does not restrict flow. But won't be as harsh as a

straight pipe. Cost is nominal at $250.00 Vs $200 for a straight pipe



Kurt Horvath

95 PT 42

10AC



@yahoogroups.com, "Gregory OConnor" ..>
wrote:

>

> Kurt, I dont think big thick straight pipes were mounted on those

> rigs for performance or efficiency. its all looks and
compensation.

> Bet every trucker with 8 inch stacks also drive a 4x4 requiring a

> step latter to get into.

> Greg 94pt,toyota pickup

>

> --- In "WanderlodgeForum%40yahoogroups.com",
"Rob Robinson"

> > wrote:

> >

> > Kurt two years ago up here in BC I saw a millenium Bluebird

parked

> across

> > from me at my home RV park that had two stacks. The owners
were

only

> > visiting and must have been out sight seeing most of the time


> because I

> > never did see them. I sure would have like to see behind
their

> engine bay.

> >

> > 2008/11/1 Kurt Horvath

> >

> > >

> > > I guess you could or go to a large 8" single , bit the
chrome

> shops

> > > sell them for outrageous prices---$692.00

> > > http://www.iowa80.com/DirectionsWEB/webcart_productDisplay.php?

> > > itemid=74151

> > > Kurt Horvath

> > > 95 PT 42

> > > 10AC

> > >

> > > In "WanderlodgeForum%40yahoogroups.com"

> 40yahoogroups.com>,

> > > David Brady wrote:

> > > >

> > > > Now we're talking. Can you fit two stacks back
there? I'm

> > > > serious. This will be an improvement in
performance. Two

stacks

> > > > will dramatically reduce backpressure, which will
result in

> > > > lower turbo pyrometer temps, and will allow more
boost and

> > > > more power. A single 5 inch, as compared to the
stock 6"

> > > > will do the reverse.

> > > >

> > > > David

> > > > '02 LXi, NC

> > > >

> > > >

> > > > Kurt Horvath wrote:

> > > > >

> > > > > One pipe from the turbo then splits to two
stacks.

> > > > >

> > > > > Kurt Horvath

> > > > > 95 PT 42

> > > > > 10AC

> > > > >

> > > > > --- In "WanderlodgeForum%40yahoogroups.com"
> 40yahoogroups.com>

> > > > > <"Wanderlodge"Forum%40yahoogroups.comdgeForum%

> 2540yahoogroups.com>>,

> > > David Brady

> > > > > wrote:

> > > > > >

> > > > > > But doesn't the trucking industry run
dual exhausts?

> > > > > >

> > > > > > David Brady

> > > > > > '02 LXi, NC

> > > > > >

> > > > > > Pete Masterson wrote:

> > > > > > >

> > > > > > > Having recently replaced my muffler
(at great expense) -

-

> had

> > > I

> > > > > to do

> > > > > > > it over again, I'd have switched
over to a 5" system

from

> > > turbo to

> > > > > > > stack. As others have stated, it's
5" at the turbo

outlet

> and

> > > the

> > > > > > > standard in the heavy truck industry
is 5".

> > > > > > >

> > > > > > > The only performance difference I
notice (between the

old

> > > blown

> > > > > out

> > > > > > > muffler and the new one) is that the
exhaust-type Jake

> brake

> > > > > seems to

> > > > > > > be slightly less effective.

> > > > > > >

> > > > > > > Pete Masterson

> > > > > > > '95 Blue Bird Wanderlodge WBDA 42

> > > > > > > aeonix1@ <"aeonix1%"40mac.com

2540mac.com>>

> > > > > > > On the road at Hohenwald, TN
(Natchez Trace Parkway)

> > > > > > >

> > > > > > > On Oct 31, 2008, at 11:24 PM, Kurt
Horvath wrote:

> > > > > > > > <snip>

> > > > > > > > For the last four weeks I have
queried Detroit Diesel,

> > > Custom

> > > > > Exhaust

> > > > > > > > Fabricators, Several OEM
Exhaust Mfg.'s, Marine

Exhaust

> > > > > Engineers &

> > > > > > > > Fabricators, My BB Guru, and
anyone else that would

> lend an

> > > > > ear, and

> > > > > > > > no one has expressed any
apprehension or regard in the

> > > respect

> > > > > to a

> > > > > > > > 5" exhaust system. In fact all
parties expressed their

> > > surprise

> > > > > in

> > > > > > > > respect as to why the system
would change size at the

> > > muffler.

> > > > > > > >

> > > > > > > > Several owners have modified
their systems to 5" from

> end to

> > > > > end, and

> > > > > > > > have seen no change in
performance. Positive or

> negative, In

> > > > > general

> > > > > > > > it was just a matter of
convenience in acquiring

parts,

> I

> > > won't

> > > > > get

> > > > > > > > into that. That has recently
been beaten to death at

the

> > > > > expense of

> > > > > > > > all parties involved

> > > > > > > >

> > > > > > >

> > > > > > >

> > > > > > > --------------------------------------------------------

--

> > > > > ------

> > > > > > >

> > > > > > > Internal Virus Database is
out-of-date.

> > > > > > > Checked by AVG.

> > > > > > > Version: 7.5.405 / Virus Database:
270.8.0/1715 -

Release

> > > Date:

> > > > > 10/9/2008 12:00 AM

> > > > > > >

> > > > > >

> > > > >

> > > > >

> > > > > ----------------------------------------------------------

> > > ------

> > > > >

> > > > > Internal Virus Database is out-of-date.

> > > > > Checked by AVG.

> > > > > Version: 7.5.405 / Virus Database:
270.8.0/1715 - Release

> Date:

> > > 10/9/2008 12:00 AM

> > > > >

> > > >

> > >

> > >

> > >

> >

> >

> >

> > --

> > Rob, Sue & Merlin Robinson

> > 94 WLWB

> >

>

Internal Virus Database is out-of-date.

Checked by AVG. Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release Date: 10/9/2008 12:00 AM

[Kurt Horvath]

> But Kurt, it's only 5 inches, correct? The turbo dumps into
> 5 inches but the gases are hot, low density, low pressure and
> moving fast. As the exhaust progresses down the exhaust
> system the air cools, becomes more dense, and back pressure
Ø increases.
Ø
Ø CORRECT, THAT IS WHY YOU USE EXHAUST BLANKETS ON THE, MANIFOLD,
TURBO, PIPES, AND STACK TO KEEP THE HEAT INSIDE THE PIPES FROM
COOLING THUS MAINTAINIG THE VELOCITY OF THE ESCAPING EXHAUST
Ø
Ø If way down the exhaust you go from 6 to 5 your
Ø increasing the backpressure.
Ø
Ø THE EXHAUST DOES NOT REDUCE DOWN TO 5" FROM 6" IT IS 5" FROM TURBO
TO THE END OF THE STACK DICHARGE. A 6" STACK CAN BE BUILT AS I
DECRIBED BEFOR BUT COSTS ARE DOUBLED. 5' SS TUBE $20 A FOOT, 6" SS
TUBE $50 A FOOT
Ø
Ø This will make the exhaust run
> hotter at the turbo, high turbo pyrometer, less turbo velocity,
> and a reduction in performance. 5 inches is 20 square inches,
> while 6 provides 30, a whopping 50% improvement. I'm gonna
> stick with the 6 or figure out a way to stuff 2 five inch stacks
Ø in the corner of the bus.
Ø
Ø I'M SURE THIS GUY COULD BUILD 2-5" STACKS AND HOOK THEM TOGETHER
WITH A COLLECTOR AT THE START LIKE HEADERS
Ø
Ø If you take it down to 5 inches, let
> us know if your turbo pyrometer shows excessive temps on
> those long 6% grades. I think the key is eliminating/reducing
> back pressure.
>
> Do you have a web page for the 5" stack that you'd like to
Ø use?

NO THEY DO NOT LIST THE STACK IT IS CUSTOM BUILT
>
Ø Check this out: http://dieselinjection.net/BRUCE/articles.html


IT WILL TAKE SOME TIME TO ASSIMULATE ALL THAT
>
>
> David
> '02 LXi, NC

>
> David
> '02 LXi, NC



--- In WanderlodgeForum@yahoogroups.com, David Brady
wrote:
>
> But Kurt, it's only 5 inches, correct? The turbo dumps into
> 5 inches but the gases are hot, low density, low pressure and
> moving fast. As the exhaust progresses down the exhaust
> system the air cools, becomes more dense, and back pressure
> increases. If way down the exhaust you go from 6 to 5 your
> increasing the backpressure. This will make the exhaust run
> hotter at the turbo, high turbo pyrometer, less turbo velocity,
> and a reduction in performance. 5 inches is 20 square inches,
> while 6 provides 30, a whopping 50% improvement. I'm gonna
> stick with the 6 or figure out a way to stuff 2 five inch stacks
> in the corner of the bus. If you take it down to 5 inches, let
> us know if your turbo pyrometer shows excessive temps on
> those long 6% grades. I think the key is eliminating/reducing
> back pressure.
>
> Do you have a web page for the 5" stack that you'd like to
> use?
>
> Check this out: http://dieselinjection.net/BRUCE/articles.html
>
>
> David
> '02 LXi, NC
>
> Kurt Horvath wrote:
> >
> > Gregg,
> >
> > Yea, ALL SHOW AND NO GO!-
> >
> > David,
> >
> > I know what you're after but the pipes I described are basically
> > straight pipes with a very well designed sound surprising ceramic
> > coating that does not restrict flow. But won't be as harsh as a
> > straight pipe. Cost is nominal at $250.00 Vs $200 for a straight
pipe
> >
> > Kurt Horvath
> > 95 PT 42
> > 10AC
> >
> > @yahoogroups.com, "Gregory OConnor" wrote:
> > >
> > > Kurt, I dont think big thick straight pipes were mounted on
those
> > > rigs for performance or efficiency. its all looks and
compensation.
> > > Bet every trucker with 8 inch stacks also drive a 4x4 requiring
a
> > > step latter to get into.
> > > Greg 94pt,toyota pickup
> > >
> > > --- In WanderlodgeForum@yahoogroups.com
> > , "Rob Robinson"
> > > wrote:
> > > >
> > > > Kurt two years ago up here in BC I saw a millenium Bluebird
> > parked
> > > across
> > > > from me at my home RV park that had two stacks. The owners
were
> > only
> > > > visiting and must have been out sight seeing most of the time
> > > because I
> > > > never did see them. I sure would have like to see behind their
> > > engine bay.
> > > >
> > > > 2008/11/1 Kurt Horvath
> > > >
> > > > >
> > > > > I guess you could or go to a large 8" single , bit the
chrome
> > > shops
> > > > > sell them for outrageous prices---$692.00
> > > > >
http://www.iowa80.com/DirectionsWEB/webc...splay.php?
> > <http://www.iowa80.com/DirectionsWEB/webc...splay.php?>
> > > > > itemid=74151
> > > > > Kurt Horvath
> > > > > 95 PT 42
> > > > > 10AC
> > > > >
> > > > > In WanderlodgeForum@yahoogroups.com
> > > > > 40yahoogroups.com>,
> > > > > David Brady wrote:
> > > > > >
> > > > > > Now we're talking. Can you fit two stacks back there? I'm
> > > > > > serious. This will be an improvement in performance. Two
> > stacks
> > > > > > will dramatically reduce backpressure, which will result
in
> > > > > > lower turbo pyrometer temps, and will allow more boost and
> > > > > > more power. A single 5 inch, as compared to the stock 6"
> > > > > > will do the reverse.
> > > > > >
> > > > > > David
> > > > > > '02 LXi, NC
> > > > > >
> > > > > >
> > > > > > Kurt Horvath wrote:
> > > > > > >
> > > > > > > One pipe from the turbo then splits to two stacks.
> > > > > > >
> > > > > > > Kurt Horvath
> > > > > > > 95 PT 42
> > > > > > > 10AC
> > > > > > >
> > > > > > > --- In WanderlodgeForum@yahoogroups.com
> > > > > 40yahoogroups.com>
> > > > > > > 40yahoogroups.com > > > 2540yahoogroups.com>>,
> > > > > David Brady
> > > > > > > wrote:
> > > > > > > >
> > > > > > > > But doesn't the trucking industry run dual exhausts?
> > > > > > > >
> > > > > > > > David Brady
> > > > > > > > '02 LXi, NC
> > > > > > > >
> > > > > > > > Pete Masterson wrote:
> > > > > > > > >
> > > > > > > > > Having recently replaced my muffler (at great
expense) -
> > -
> > > had
> > > > > I
> > > > > > > to do
> > > > > > > > > it over again, I'd have switched over to a 5" system
> > from
> > > > > turbo to
> > > > > > > > > stack. As others have stated, it's 5" at the turbo
> > outlet
> > > and
> > > > > the
> > > > > > > > > standard in the heavy truck industry is 5".
> > > > > > > > >
> > > > > > > > > The only performance difference I notice (between
the
> > old
> > > > > blown
> > > > > > > out
> > > > > > > > > muffler and the new one) is that the exhaust-type
Jake
> > > brake
> > > > > > > seems to
> > > > > > > > > be slightly less effective.
> > > > > > > > >
> > > > > > > > > Pete Masterson
> > > > > > > > > '95 Blue Bird Wanderlodge WBDA 42
> > > > > > > > > aeonix1@ > > 2540mac.com>>
> > > > > > > > > On the road at Hohenwald, TN (Natchez Trace Parkway)
> > > > > > > > >
> > > > > > > > > On Oct 31, 2008, at 11:24 PM, Kurt Horvath wrote:
> > > > > > > > > > <snip>
> > > > > > > > > > For the last four weeks I have queried Detroit
Diesel,
> > > > > Custom
> > > > > > > Exhaust
> > > > > > > > > > Fabricators, Several OEM Exhaust Mfg.'s, Marine
> > Exhaust
> > > > > > > Engineers &
> > > > > > > > > > Fabricators, My BB Guru, and anyone else that
would
> > > lend an
> > > > > > > ear, and
> > > > > > > > > > no one has expressed any apprehension or regard
in the
> > > > > respect
> > > > > > > to a
> > > > > > > > > > 5" exhaust system. In fact all parties expressed
their
> > > > > surprise
> > > > > > > in
> > > > > > > > > > respect as to why the system would change size at
the
> > > > > muffler.
> > > > > > > > > >
> > > > > > > > > > Several owners have modified their systems to 5"
from
> > > end to
> > > > > > > end, and
> > > > > > > > > > have seen no change in performance. Positive or
> > > negative, In
> > > > > > > general
> > > > > > > > > > it was just a matter of convenience in acquiring
> > parts,
> > > I
> > > > > won't
> > > > > > > get
> > > > > > > > > > into that. That has recently been beaten to death
at
> > the
> > > > > > > expense of
> > > > > > > > > > all parties involved
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > ----------------------------------------------------
----
> > --
> > > > > > > ------
> > > > > > > > >
> > > > > > > > > Internal Virus Database is out-of-date.
> > > > > > > > > Checked by AVG.
> > > > > > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 -
> > Release
> > > > > Date:
> > > > > > > 10/9/2008 12:00 AM
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --------------------------------------------------------
--
> > > > > ------
> > > > > > >
> > > > > > > Internal Virus Database is out-of-date.
> > > > > > > Checked by AVG.
> > > > > > > Version: 7.5.405 / Virus Database: 270.8.0/1715 -
Release
> > > Date:
> > > > > 10/9/2008 12:00 AM
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Rob, Sue & Merlin Robinson
> > > > 94 WLWB
> > > >
> > >
> >
> >
> > ------------------------------------------------------------------
------
> >
> > Internal Virus Database is out-of-date.
> > Checked by AVG.
> > Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release Date:
10/9/2008 12:00 AM
> >
>

[David Brady]

Kurt,



The Donaldson website has some interesting pdf's which

show exhaust temps and flow rates (cfm) for the 500 hp

Series 60 motor:



http://www.donaldson.com/en/exhaust/supp...053704.pdf



From this they get temps of 825 deg F, and CFM's of

2877 cubic feet/min, and max back pressure of 3 in of Hg.





Then you can go to this pdf to select a muffler based on the

input/output diameter, exhaust temp and CFM.:





http://www.donaldson.com/en/exhaust/supp...056799.pdf



There are no six inch mufflers, of the five inchers 3 seam suitable,

but all are on the hairy edge. If your seeking to reduce backpressure

and improve performance, then none are suitable and you'll have

to go with someone elses six, or dual fives.



The three that are close are:



M090535, 3260cfm at 3"Hg

M100944, 2950cfm

M120747, 3100cfm



I compared the volume of the mufflers with the volume of the

stock muffler:



M090535, 44" len, 9" dia, 2800 cubic inches

M100944, 44" len, 10" dia, 3455 cubic inches

M120747, 26" len, 12" dia, 2940 cubic inches

Stock: 48" len, 12" dia, 5400 cubic inches



Not saying that volume of the muffler improves flow characteristics,

but it in the absence of other stock muffler specific data, this is

an interesting comparison.



David Brady

'02 LXi,





David Brady wrote:

But Kurt, it's only 5 inches, correct? The turbo dumps into

5 inches but the gases are hot, low density, low pressure and

moving fast. As the exhaust progresses down the exhaust

system the air cools, becomes more dense, and back pressure

increases. If way down the exhaust you go from 6 to 5 your

increasing the backpressure. This will make the exhaust run

hotter at the turbo, high turbo pyrometer, less turbo velocity,

and a reduction in performance. 5 inches is 20 square inches,

while 6 provides 30, a whopping 50% improvement. I'm gonna

stick with the 6 or figure out a way to stuff 2 five inch stacks

in the corner of the bus. If you take it down to 5 inches, let

us know if your turbo pyrometer shows excessive temps on

those long 6% grades. I think the key is eliminating/reducing

back pressure.



Do you have a web page for the 5" stack that you'd like to

use?



Check this out: http://dieselinjection.net/BRUCE/articles.html





David

'02 LXi, NC



Kurt Horvath wrote:

Gregg,



Yea, ALL SHOW AND NO GO!-



David,



I know what you're after but the pipes I described are basically

straight pipes with a very well designed sound surprising ceramic

coating that does not restrict flow. But won't be as harsh as a

straight pipe. Cost is nominal at $250.00 Vs $200 for a straight pipe



Kurt Horvath

95 PT 42

10AC



@yahoogroups.com, "Gregory OConnor" ..>
wrote:

>

> Kurt, I dont think big thick straight pipes were mounted on those

> rigs for performance or efficiency. its all looks and
compensation.

> Bet every trucker with 8 inch stacks also drive a 4x4 requiring a

> step latter to get into.

> Greg 94pt,toyota pickup

>

> --- In "WanderlodgeForum%40yahoogroups.com",
"Rob Robinson"

> > wrote:

> >

> > Kurt two years ago up here in BC I saw a millenium Bluebird

parked

> across

> > from me at my home RV park that had two stacks. The owners
were

only

> > visiting and must have been out sight seeing most of the time


> because I

> > never did see them. I sure would have like to see behind
their

> engine bay.

> >

> > 2008/11/1 Kurt Horvath

> >

> > >

> > > I guess you could or go to a large 8" single , bit the
chrome

> shops

> > > sell them for outrageous prices---$692.00

> > > http://www.iowa80.com/DirectionsWEB/webcart_productDisplay.php?

> > > itemid=74151

> > > Kurt Horvath

> > > 95 PT 42

> > > 10AC

> > >

> > > In "WanderlodgeForum%40yahoogroups.com"

> 40yahoogroups.com>,

> > > David Brady wrote:

> > > >

> > > > Now we're talking. Can you fit two stacks back
there? I'm

> > > > serious. This will be an improvement in
performance. Two

stacks

> > > > will dramatically reduce backpressure, which will
result in

> > > > lower turbo pyrometer temps, and will allow more
boost and

> > > > more power. A single 5 inch, as compared to the
stock 6"

> > > > will do the reverse.

> > > >

> > > > David

> > > > '02 LXi, NC

> > > >

> > > >

> > > > Kurt Horvath wrote:

> > > > >

> > > > > One pipe from the turbo then splits to two
stacks.

> > > > >

> > > > > Kurt Horvath

> > > > > 95 PT 42

> > > > > 10AC

> > > > >

> > > > > --- In "WanderlodgeForum%40yahoogroups.com"
> 40yahoogroups.com>

> > > > > <"Wanderlodge"Forum%40yahoogroups.comdgeForum%

> 2540yahoogroups.com>>,

> > > David Brady

> > > > > wrote:

> > > > > >

> > > > > > But doesn't the trucking industry run
dual exhausts?

> > > > > >

> > > > > > David Brady

> > > > > > '02 LXi, NC

> > > > > >

> > > > > > Pete Masterson wrote:

> > > > > > >

> > > > > > > Having recently replaced my muffler
(at great expense) -

-

> had

> > > I

> > > > > to do

> > > > > > > it over again, I'd have switched
over to a 5" system

from

> > > turbo to

> > > > > > > stack. As others have stated, it's
5" at the turbo

outlet

> and

> > > the

> > > > > > > standard in the heavy truck industry
is 5".

> > > > > > >

> > > > > > > The only performance difference I
notice (between the

old

> > > blown

> > > > > out

> > > > > > > muffler and the new one) is that the
exhaust-type Jake

> brake

> > > > > seems to

> > > > > > > be slightly less effective.

> > > > > > >

> > > > > > > Pete Masterson

> > > > > > > '95 Blue Bird Wanderlodge WBDA 42

> > > > > > > aeonix1@ <"aeonix1%"40mac.com

2540mac.com>>

> > > > > > > On the road at Hohenwald, TN
(Natchez Trace Parkway)

> > > > > > >

> > > > > > > On Oct 31, 2008, at 11:24 PM, Kurt
Horvath wrote:

> > > > > > > > <snip>

> > > > > > > > For the last four weeks I have
queried Detroit Diesel,

> > > Custom

> > > > > Exhaust

> > > > > > > > Fabricators, Several OEM
Exhaust Mfg.'s, Marine

Exhaust

> > > > > Engineers &

> > > > > > > > Fabricators, My BB Guru, and
anyone else that would

> lend an

> > > > > ear, and

> > > > > > > > no one has expressed any
apprehension or regard in the

> > > respect

> > > > > to a

> > > > > > > > 5" exhaust system. In fact all
parties expressed their

> > > surprise

> > > > > in

> > > > > > > > respect as to why the system
would change size at the

> > > muffler.

> > > > > > > >

> > > > > > > > Several owners have modified
their systems to 5" from

> end to

> > > > > end, and

> > > > > > > > have seen no change in
performance. Positive or

> negative, In

> > > > > general

> > > > > > > > it was just a matter of
convenience in acquiring

parts,

> I

> > > won't

> > > > > get

> > > > > > > > into that. That has recently
been beaten to death at

the

> > > > > expense of

> > > > > > > > all parties involved

> > > > > > > >

> > > > > > >

> > > > > > >

> > > > > > > --------------------------------------------------------

--

> > > > > ------

> > > > > > >

> > > > > > > Internal Virus Database is
out-of-date.

> > > > > > > Checked by AVG.

> > > > > > > Version: 7.5.405 / Virus Database:
270.8.0/1715 -

Release

> > > Date:

> > > > > 10/9/2008 12:00 AM

> > > > > > >

> > > > > >

> > > > >

> > > > >

> > > > > ----------------------------------------------------------

> > > ------

> > > > >

> > > > > Internal Virus Database is out-of-date.

> > > > > Checked by AVG.

> > > > > Version: 7.5.405 / Virus Database:
270.8.0/1715 - Release

> Date:

> > > 10/9/2008 12:00 AM

> > > > >

> > > >

> > >

> > >

> > >

> >

> >

> >

> > --

> > Rob, Sue & Merlin Robinson

> > 94 WLWB

> >

>

Internal Virus Database is out-of-date.

Checked by AVG. Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release Date: 10/9/2008 12:00 AM

Internal Virus Database is out-of-date.

Checked by AVG. Version: 7.5.405 / Virus Database: 270.8.0/1715 - Release Date: 10/9/2008 12:00 AM