6" SS EXHAUST STACK

[Kurt Horvath]

DAVID,

WHAT IS THE FLOW RATE FOR 5" and 6" staight pipes, I have a new
86610M I would like to sell it. Evidently were comparing apples and
oranges, If your coach uses a diffrent muffler. All my research has
been for the 95-96 PT 42's and it's systems. I can't help much in
regardes to the other model coaches

Kurt
95 PT 42
10AC

--- In WanderlodgeForum@yahoogroups.com, David Brady
wrote:
>
> For comparison sake, the manufacturer of the OEM muffler
> is Nelson:
>
> http://www.nelsonexhaust.com.au/pdfs/fleetguard.pdf
>
> They don't list the LXi muffler in the above pdf, I'll call on
> Monday to see if I can get some CFM specs from them. The
> closest item in the above pdf is a 6" inlet and outlet straight
> thru muffler measuring 282mm dia and 1130mm length, part
> number 86610M. The OEM LXi muffler measures 300mm
> dia, and 1200mm length.
>
> The above pdf lists CFM specs for part number 86610M as
> follows:
>
> at 3 mm of Hg pressure: cfm = 3700
> at 2 mm of Hg pressure: cfm = 3020
>
> I expect the numbers to be even higher for the stock LXi OEM
> muffler. I'll call to get actual numbers, but these are the kinds of
> CFM's that we should be looking for. So far I haven't seen any
> 5" mufflers coming close to that kind of flow rate at these
pressures.
>
> David Brady
> '02 LXi, NC
>
> David Brady wrote:
> >
> > Kurt
> >
> > I'm more convinced now that 5" is the standard trucking muffler
> > size cause they run dual stacks. Donaldson doesn't make a
> > muffler that's suitable for the 14L Series 60, in this case you
have
> > to use dual 5 inchers if you buy from Donaldson. Again, it would
> > be interesting to take a look at your typical late model 14L
Series
> > 60 equipped Prevost. I know their mufflers exit below the bumper,
> > but it would be interesting nonetheless. I'm interested in all
this cause
> > I'll be needing a muffler change in the near future, so let's
work
> > together
> > to arrive at a good solution. I want more horsepower. Let's figure
> > out how to improve the breathing. Assuming that the intake is not
the
> > limiting factor, and I don't think it is, enhancing the exhaust
should
> > improve performance and engine life, less heat, higher manifold
> > pressures, better fuel mileage and longer piston and ring life.
Not
> > trying to get under your skin, just looking for a suitable
improvement in
> > my engine. Your the lucky guy who's gotta travel down this road
> > first.
> >
> > David
> > '02 LXi, NC
> >
> > Kurt Horvath 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
> >> 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
> >> <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
> >> <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?>
> >> > >
<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
> >> > >
> >> >
> >>
> >> -----------------------------------------------------------------
-------
> >>
> >> 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
> >
>