Date: Fri, 21 Dec 2012 06:20:54 -0800
Reply-To: Don Hanson <dhanson928@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Don Hanson <dhanson928@GMAIL.COM>
Subject: Re: [Diesel-Vanagon] Re: Diesel Vanagon Exhaust Design
In-Reply-To: <CAB2RwfgMYNMK+=q-sTahGskLf3-+=+tNO4KQo=+nzceQtt8LLw@mail.gmail.com>
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Neil, the diesel vanagon exhaust downpipe uses a 'toilet bowl' type
flange in place of a flex section. I suppose this +might+ allow for some
movement to relieve stress, but I always figured it was like that only to
make the system almost impossible to remove and
install....*grin*....perhaps with some special tool it's a snap...(pun).
When I had that system on my inline gas motor it was the very hardest part
of working on that motor....The "C" clips that were holding the round end
of the exhaust downpipe into the bowl-shaped manifold, those things would
"sproing!" across my shop if I got even slightly crooked with my pry bars
and clamps as I tried to work on that nasty set up. On an aside, the
diesel 1.6 na. manifold has tiny inside diameters and is very restrictive.
Your install is new-ish territory. With the cat and at 15deg rather
than at 50deg...not many of those running, so there isn't any tried and
true way. The FAST auto new-style set-up that has gotten recent
discussion by the Tiico crowd....it *might* work...it has to be better than
the 1st Gen Tiico ones that everyone has problems with...Key word is
"might" since they haven't been around long enough for real world
durability to show yet.
I'd go with a system mounted to the engine only. That seems to be the
most successful and widely-accepted way to do in inline exhaust in the
vanagon. I would not use a flex section. As I have evolved my own
inline exhaust systems I have had those sections crack and split....they
are weak....I don't think they are needed..They aren't there on the diesels
and quite a few gas conversions have been on the road for years without
them, I read on the net.
Don Hanson
On Fri, Dec 21, 2012 at 12:07 AM, neil n <musomuso@gmail.com> wrote:
> Thanks for your thoughts and comments Scott.
>
> Yah I know; don't reinvent the wheel. < grin >
>
> I just don't want to have to do this exhaust "design" and build job a 3rd
> time.
>
> My engine is mounted at 15º, and I'm running a cat so the space
> between the driver and passenger side "DV" brackets isn't as wide as a
> 50º diesel Vanagon engine. The arm I built off of the driver side
> bracket, Image: http://tinyurl.com/9ythuq5 (uses a 5" muffler
> clamp) was an add on redesign done shortly before the down pipes
> finally cracked. I might keep this cat support design but don't really
> like the idea of running one the driver side exhaust support to the
> cat.
>
> Neil.
>
>
>
> On Thu, Dec 20, 2012 at 10:23 PM, Scott Daniel - Turbovans
> <scottdaniel@turbovans.com> wrote:
> >
> > hi ..
> > as I said, stock DV exhaust systems don't have a problem with cracking.
> >
> > on the two DV systems I have laying around that have a flex junction in
> them..
> > the muffler is still mounted to the engine with rubber mounts.
> >
> > the stock system is So Good that I have reproduction left and right
> muffler brackets that I had made.
> > Nice 'n heavy duty too.
> > Have a few sets left.
> >
> >
> > I get them cut out by a computer controlled machine ..
> > very simple to order say 5 more , at any time. - as they aleady
> exisit in a computer program at my fabricator's.
>
>
>
>
>
> --
> Neil n
>
> 6
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>
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