question regarding header & tuned pipe

Tue Mar 25 09:47:06 AKST 2003

Bolly mufflers use a very different kind of resin that is more temp 
resistent than the ES pipes.  It will become brittle over time, but will 
not ablate.  Bolly's also eventually leak like a seive over their length 
eventually.

--Lance

Ron Lockhart <ronlock at comcast.net>
Sent by: discussion-request at nsrca.org
03/25/2003 10:11 AM
Please respond to discussion

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        Subject:        Re: question regarding header & tuned pipe

Lance,

Would you know, is the end of the pipe being exposed to exhaust 
gas a concern with the Bolly pipes & mufflers?

TIA   Ron Lockhart

----- Original Message -----
From: s.vannostrand at kodak.com
Date: Tuesday, March 25, 2003 10:52 am
Subject: Re: question regarding header & tuned pipe

> Every change in backpressure, due to the expansion chamber or 
> header change will cause a wave reflection, however, the effects of 
> necking down from 7/8 to the approx 3/4" OS pipe will not be much. 
The bigger problem is that if the pipe is composite (CF) you will 
ablate the pipe input and ruin the pipe.  I've seen 3 of these for 
repair.  The hot exhaust gasses can not be allowed to contact the end 
of the fibers and resin for most resins.  ES pipes fail in this 
fashion.  Some people have been successful in using a squishy coupler 
(like the Macs grey) but this is not a reliable setup for most people. 
> 
> The Mintor carbon fiber pipe (I have a N.I B. one for sale for 
> $160 including shipping) uses an aluminum inlet to prevent this.  I 
> also have a Macs to OS adapter made from aluminum for $12.
> 
> -Lance

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