Thanks Robert.

I think I know the downpipe you are speaking of.

On Sun, Mar 9, 2008 at 9:14 AM, Robert Keezer <warmerwagen@yahoo.com> wrote:

>  It's pretty much a
>  bolt-in with fabbing up the left bracket the main
>  delay, and welding the bellows on.

"main delay" ?

What part is that?

My engine will be a 15 degree mount. I *think* this would bring the
Tiico type downpipe up and over compared to a 50 degree. Not sure if
that would present a problem re: fit.

But thanks for suggestion of the flex joint and your findings using one.

Hopefully I'll have the engine roughed in tomorrow!

Neil.

On Sun, Mar 9, 2008 at 9:14 AM, Robert Keezer <warmerwagen@yahoo.com> wrote:
> Frank's muffler design is what I origallly tried
>  to do with my I-4.
>  But I found a 6-bolt flange Tiico downpipe to
>  which I had the bellows welded .
>
>  This goes into a cat and and then a Vanagon 2.1
>  muffler, exactly like the Tiico set-up but with
>  the added flexibility of the bellows  to prevent
>  cracking .
>
>  Solid mount Tiico flanges crack.
>  If possible to get the Tiico downpipes this can
>  save you a lot of trouble. It's pretty much a
>  bolt-in with fabbing up the left bracket the main
>  delay, and welding the bellows on.
>
>  Robert
>  1982 Westfalia
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>  --- Frank Grunthaner <FrankGRUN@AOL.COM> wrote:
>
>  > In a message dated 3/8/08 8:05:41 PM,
>  > sfcompost@YAHOO.COM writes:
>  >
>  >
>  > > Neil, with my I4 vanagon I had 2 different
>  > exhaust designs with radically
>  > > different results.  The first set up I had
>  > built at a exhaust shop using an
>  > > old Dasher dual outlet manifold, which angles
>  > toward the front of the van. I
>  > > had the shop follow the example I had seen on
>  > a German engine conversion site
>  > > which ran the exhaust forward through the
>  > aircooled heater tube hole, forward
>  > > to a muffler hung under the center of the
>  > van, into a 180 degree bend back
>  > > toward the rear and then out to the driver
>  > side ahead of the rear wheel. This
>  > > required a simple layer of sheet metal as a
>  > heat-shield to keep the heat away
>  > > from the floor, but worked very well and was
>  > almost too quiet.  No vibration
>  > > problems whatsoever.  My only concern was
>  > that the cat was a bit too close to
>  > > the transaxle. And, I liked having the
>  > exhaust coming out of the side of the
>  > > van, as it told those discerning van-heads
>  > that this was no normal
>  > > air-cooled van.
>  > >
>  > Sam and other interested parties,
>  >
>  > When I developed the Audi 3A turbo, I used a
>  > run to the front-then turn
>  > around and go back approach. The Audi 80/90
>  > manifolds are definitely the best for
>  > the I4 gas system. Alistair had to do some
>  > clearance nibbling on the 4 to 2
>  > manifold and I didn't have to on my version.
>  > For the Audi turbo, I used the Audi
>  > 80/90 CA (for California) 4 to 1 version, since
>  > it matched the turbo inlet
>  > well. For the exhaust, I used the Saab turbo
>  > flex downpipe (stainless net wrapped
>  > bellows) then went through the air-cooled
>  > heater port and up the drivers side
>  > to a large bore muffler I studied the VW Golf
>  > mufflers   with the 90 degree
>  > offset of inlet and outlet. I liked the idea of
>  > coupling two of them together
>  > to build the 180 degree reversal to run the
>  > pipe back out to the rear. In the
>  > end, I couldn't fit them in place so I went to
>  > a large oval muffler (Dynamax I
>  > think) that had inlet and outlet on the same
>  > side. So 2.5 inch pipe in and out
>  > with the outlet running back to the rear. I
>  > used a long and round resonator
>  > at the exit, passenger side running along the
>  > side of the sound-deadening pan.
>  >
>  > The muffler and exhaust pipe was supported by
>  > universal heavy duty truck
>  > muffler supports. My space limits were given by
>  > the propane tank on one side and
>  > the auxiliary diesel/fuel tank on the other. I
>  > also encountered some floor
>  > heating and added a heat shield. My target was
>  > quiet and this system has certainly
>  > delivered. I had engineered out vibration
>  > previously and no new vibration was
>  > introduced by this system. No breakage either,
>  > but the expansion/contraction
>  > lever arm (also vibrational and torsional
>  > stress) was resolved over a distance
>  > 5 to 8 times longer than the stock system.
>  >
>  > For the TDi, I left this system in place. When
>  > I get back to California, I
>  > try to get some pictures, if there is interest.
>  >
>  >
>  > For the I4 gas, the Audi 80/90 and Alistairs
>  > approach should be fine. I went
>  > from the Audi 2 port flange to a 2 to 1
>  > collector then to a bellows and out.
>  > All hanging from the original muffler mounts.
>  > Details on Bell's website and
>  > these comments from faulty memory while
>  > feasting on N�rmberger Bratwurst and
>  > Augustinerbrau.
>  >
>  > Frank Grunthaner
>  >
>  >
>  >
>  > **************
>  > It's Tax Time! Get tips, forms, and advice on
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>
>
> > Finance.
>  >
>  >
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>  >
>
>
>
>
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-- 
Neil Nicholson. 1981 Air Cooled Westfalia - "Jaco"

http://web.mac.com/tubaneil
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