6" SS EXHAUST STACK

[Kurt Horvath]

David,


I think your muffler is 6" inlet & out your pipes from the turbo to
the muffler are 5"

Kurt Horvath
95 PT 42
10AC


--- In WanderlodgeForum@yahoogroups.com, David Brady
wrote:
>
> The LXi, like your WB, uses a 6 inch muffler. Five inch will
> certainly suck some ponies away.
>
> David Brady
> '02 LXi, NC
>
> Kurt Horvath wrote:
> >
> >
> >
> > Yea I've heard that but the one with the liner has fixed the high
> > pressure leaks according to the Mfg. Let's hope. Prevost has from
> > what I recall pipes bent in one piece, they are held together with
> > those nifty band clamps that seat and conform to the pipe
exterior,
> > If the V-Bands and Flanges don't work out I'll go to those pipe
> > clamps. The Flanges are also available with three different types
of
> > gaskets, o-ring, flat, and, and, and I can't remember, oh yea the
> > type I bought, male-female flanges, perfect alignment, leak free,
> > again according to Vibrant Mfg. There is also a Stainless Steel
> > Muffler available that may work well on your coach, but it's inlet
> > outlet is 5" not the 6" like on your coach. well I assume yours is
> > 6"??? Also it is 10" in diameter which would help with crowed
exhaust
> > tunnel.
> >
> > Kurt Horvath
> > 95 Pt 42
> > 10AC
> >
> > --- In WanderlodgeForum@yahoogroups.com
> > , David Brady
> > wrote:
> > >
> > > Hi Kurt,
> > >
> > > No thanks, I already have a stock muffler. Thanks for the links,
> > > there's some pretty nifty items there. Be careful with those
fancy
> > > braided stainless steel pieces. They look sharp, but they've
always
> > > leaked on my turbocharged subaru wrx. Kurt, you've been around
> > > a few over-the-road coaches, Prevost' and what not, what do they
> > > run on their exhaust systems; i.e., expansion pipes, flex pipe,
etc.
> > >
> > > David Brady
> > > '02 LXi, NC
> > >
> > > Kurt Horvath wrote:
> > > >
> > > > David, Would you like to take that brand new muffler off my
> > hands???
> > > >
> > > > According to DD straight pipe & ECU will not have any issues
in
> > the
> > > > 95 vintage S 60.
> > > >
> > > > OEM built that pipe for BB ACAP - As Cheep As Possible -
> > > >
> > > > The original routing of the pipe leaves the turbo, source of
the
> > > > first failure, cracked the 1st 90 degree turn a short
straight run
> > > > 2nd. 90 degree turn, then into a double ball connector that
also
> > > > telescopes in and out. You can check out that piece of S---,
sorry
> > > > engineering wonder here.
> > > >
> > > > http://www.dynaflexproducts.com/download...g_03_pg70-
> > <http://www.dynaflexproducts.com/download...g_03_pg70->
> > 89.pdf
> > > > <http://www.dynaflexproducts.com/download...g_03_pg70-

> > <http://www.dynaflexproducts.com/download...g_03_pg70->
> > 89.pdf>
> > > >
> > > > Page 76 Double Ball Joint with Slip Joint Feature Allowing
Lateral
> > > > Movement length 16 to 18 inches mine measures 14 .55 inches at
> > > > present. This marvel allows for 10 degrees of angularity 360
> > degree
> > > > rotation 2" of offset 2" axial movement,. Hell the u joints
can't
> > > > move around that much. Besides it was hard clamped to the
mount
> > from
> > > > the engine in front of this connection not to mention rusted
to
> > the
> > > > point that it took an pneumatic impact chisel to get it
apart.. So
> > > > what's the point. You need flex in between the turbo and the
first
> > > > mount.
> > > >
> > > > The Flex Connector with liner I choose is here at
> > > >
> > > > http://vibrantperformance.com/catalog/product_info.php?
> > <http://vibrantperformance.com/catalog/product_info.php?>
> > > > <http://vibrantperformance.com/catalog/product_info.php?
> > <http://vibrantperformance.com/catalog/product_info.php?>>
> > > >
> >
cPath=1022_1035_1064_1114&products_id=1008&osCsid=999d7ef5fdd15864bae3
> > > > 3db41abf5ef9
> > > >
> > > > The 2 90 degree turns were fabricated in that manner because
it's
> > not
> > > > easy to bend large diameter pipe in a single 180 degree bend,
thus
> > > > they weld 2 90's together, which is the industry standard for
> > > > manufacturing a 180 degree turn in large pipe exhausts. Well
this
> > > > ain't the factory and we're not constrained by what is easy. I
> > have
> > > > acquired a 14ga 180 degree U-Tube that has the same external
> > > > dimensions as the original pipe. I'm not an engineer but I
> > reasonably
> > > > certain that with the remaining 90 degree bend and a 45 degree
> > bend
> > > > there will be sufficient back pressure.
> > > >
> > > > There will also be a flexible pipe hanger mount behind the
Flex
> > > > connector mounted on the ceiling of the engine compartment
that
> > will
> > > > support the middle section of pipe and will allow for any
movement
> > > > and or torque that may be transferred to the pipe by the
motor.
> > The
> > > > original clamps for the muffler have to go as they are 6" but
the
> > > > rubber isolated mounting bars will remain and that's all that
was
> > > > there to begin with. So where's the rub? Bub!
> > > >
> > > > Not to take anything away from the engineers that designed the
> > Bird,
> > > > But there are some glaring deficiencies. 7 way trailer plug,
Air
> > > > Purge System, Watts valve, Accelerator and Brake peddles,
Front
> > Left
> > > > Shock Mount, Relay for Jake Brake, W/D Vent for Slendide 2000,
> > > > Installation of Refrigerator with inadequate convection, The
seat
> > > > belts mounted to floor instead of the seat, That reminds me I
> > still
> > > > have to fix that one. Nothing like hitting a road transition
just
> > to
> > > > have the air ride seat bounce and the seat belts automatically
> > adjust
> > > > for the slack then the air ride seat rebounds and the belts
try to
> > > > cut you in half at the waist. That's just the 95 PT 42. I'm
not
> > > > bitchin! I'm fixin
> > > >
> > > > Kurt Horvath
> > > > 95 PT 42
> > > > 10AC
> > > >
> > > > --- In WanderlodgeForum@yahoogroups.com
> >
> > > > , David Brady

> > > > wrote:
> > > > >
> > > > > Kurt,
> > > > >
> > > > > I agree with Greg. I'm gonna keep mine stock. There's a
bunch
> > > > > of vibration and movement back there. I figure BB's been
> > building
> > > > > buses a whole lot longer than I have. Initially I'd scratch
my
> > > > > head when looking at the frame and support pieces, but when
> > > > > you consider that something as big as a bus must twist and
flex,
> > > > > this flexibility needs to be designed in. Make one piece
> > stronger
> > > > > and you've created a stress raiser someplace else.
> > > > >
> > > > > I have a friend who transplanted a honda v-tech motor into a
> > > > > lotus elise. Everything worked but the alternator mount. The
> > mount
> > > > > insists on cracking. There can be some weird harmonics and
> > > > > resonant frequencies going on that are difficult to grasp
and
> > > > > only trial and error and a 50 year track record of building
> > buses
> > > > > can solve (unless you can model it and run high powered
> > > > > computer finite element analysis on it). He's still fighting
> > that
> > > > > mount...
> > > > >
> > > > > Okay, I'm off my soap box.
> > > > >
> > > > > David Brady
> > > > > '02 LXi, NC
> > > > >
> > > > > Gregory OConnor wrote:
> > > > > >
> > > > > > Kurt, try and figure why there were 4 bends. it may be
that
> > it was
> > > > > > engineered to alow for swing room between the 'hung
exhaust'
> > and
> > > > > > the 'torque reaction of the ruber mounted detroit'. look
at
> > the
> > > > roll
> > > > > > of the torque and see that there is a place for the
movement
> > to
> > > > twist
> > > > > > a union. I kinda think this movement was the problem with
the
> > > > > > resulting crack. crack=result ;movement=cause ;facilitate
> > movement
> > > > > > =repair. may be that BB enginered it correct but someone
> > > > > > overtightened a band to cure an exhaust leak??????? you
also
> > got
> > > > to
> > > > > > keep the stack from cantilivering off of the maniford with
> > your
> > > > new
> > > > > > design. Scavenging is one variable in fuel efficiency.
even
> > > > straight
> > > > > > pipes some time will result in lower fuel economy because
the
> > > > intake
> > > > > > variable get screwd. backpressure is mathed into the
computer.
> > > > > >
> > > > > >
> > > > > > ----------------------------------------------------------
> > > > ------
> > > > > >
> > > > > > 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
> >
>