Flex pipe (was RE: Tensioner Good, Exhaust Bad)

[mardak at cogeco.ca (Mark)]

Another solution to the problem is using stiffer front and back engine
mounts to minimize engine movement when suddenly loaded (or unloaded).
I've run a combination of poly and TT mounts for 13+ years on various
cars with nothing but "rigid" exhaust systems and had ZERO problems.
Even the torquey warmed over 2.0 ABA mated to an old TT (ie: rusty)
exhaust (sans cat or any flex type joints) has held up no problem.  My
race downpipe sits VERY close to the floor (due to the higher ABA
block), so if there was movement I would hear it hit, or at the very
least feel a vibration.

So, IMHO I feel a flex pipe (which by it's very nature would restrict
airflow due to turbulence - no equal dia. wavy pipe will flow as well as
a straight one) is unnecessary if you're running stiff engine mounts,
even with more than stock power levels.  Whether or not the same holds
true on a 200+hp FI powerplant, I don't know...   Any input from the
high hp crowd?

Mark.
75
77
80 S
81 
81 S  2.0 ABA/JH/4K
 

> -----Original Message-----
> From: scirocco-l-bounces@scirocco.org [mailto:scirocco-l-
> bounces@scirocco.org] On Behalf Of Spewey
> Sent: April 23, 2004 3:50 PM
> To: Scirocco-l@scirocco.org
> Subject: Re: Tensioner Good, Exhaust Bad
> 
> Dan Smith wrote:
> 
> > pick one up in just about any diameter from ATP (www.8vturbo.com).
> > Lots of people use them for their custom downpipe applications and
> > they seem of pretty decent quality.
> >
> > Just checked the site. They're stainless steel and come in sizes 2,
> > 2.5, 3 and 4". Prices go from $26 to $49.
> 
> Schweet.  That was exactly the answer I was looking for and should
help
> Bryan R as well.  Cat or no cat, header or not, it has to bend
somewhere
> and it's good to know an affordable source for 2 & 2.5" exhausts.
They
> also have some other nice looking hardware.
> 
> But now, weren't the bigger stock [A2 GLI/16V] exhaust parts 55mm
> (2.16") so if you want to use one of these with that you still need to
> keep looking or accept a compromise?  I can't remember.
> 
> > Spewey wrote: I would love to hear the current state of the art on
> > solving this matter from the pros.
> 
> Guess that's done.  Nice job and thanks.
> Now can you show me an A1 with 4" pipe anywhere on the net?
> 
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