6" SS EXHAUST STACK

[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
> >
>