Hi to the list,
<Lurking mode off>
>Date: Wed, 1 Sep 1999 17:26:40 EDT
>From: JHef101@aol.com
>Subject: Re: Exhaust
>
>Larry,
> I'm referring to the H pipe cracking at the welds doe to the exhaust
>pulses not being synchronized and the H pipe makes the entire system too
>ridgid. I had the same problem with a cross-over exhaust system on a Pitts
>aerobatic aircraft that I built some years ago and traced it back to the
same
>cause. At any rate I don't think that the horsepower loss is significant
>enough to justify going with an H pipe with it's inherent problems, if
Cullen
>is lurking maybe he can shed some light as he and I had this discussion
about
>2 years ago.
>
>
>Jeff Hefner
>B9470028
>
I have been running the Flowmasters with 2" pipes and the "H" crossover for
several years and about 3000 miles now with no cracks or problems (just
lucky I guess). When I installed the whole system, I did buy new hanger
mounts for everywhere. Maybe that makes the difference?. I even got into a
fender bender last year without cracking anything in the exhaust system. I
have given some thought into just what I will do when I have to drop the
pipes for whatever reason. In that event I plan to cut the center of the "H"
and put a sleeve on it with clamps to go back. I will also cut the bottom of
the header pipe (just prior to the frame holes) and install 2-bolt flanges
with an asbestos (or equivalent) gasket. Hopefully that will be a long time
in the future. I still love the sound it puts out (sound activated
testosterone generator).
p.s. Has anyone heard of ANY planning toward a European Y2000 event/rally?
<Lurk mode on>
Cullen Bennett
Tempe, Arizona USA
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