question regarding header & tuned pipe

[Tomanek, Wojtek]

Ron
 
I have been using Bolly FS-140 Four Stroke 1.40 Muffler for two season now,
it is very quiet, it holds the temperature well and it has an aluminum neck
at the intake that fits great with 1/2 in Teflon header coupler.
 
Wojtek
 
 
 
 
-----Original Message-----
From: s.vannostrand at kodak.com [mailto:s.vannostrand at kodak.com]
Sent: Tuesday, March 25, 2003 1:47 PM
To: discussion at nsrca.org
Subject: Re: question regarding header & tuned pipe
 

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 
        
        To:        discussion at nsrca.org 
        cc:         
        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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