to tune the pipe

[Bob Richards]

Dean,
 
And I always thought you were a genuinely happy person. Now I realize your face is permanently shaped that way from the wind.
 
Or, maybe you were too close to the car exhaust for too long. Hmmm....  <VBG>
 
Bob.


Dean Pappas <d.pappas at kodeos.com> wrote:
That's hangin' my head out the window like a happy dog ...
 

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Dean Pappas
Sent: Monday, November 29, 2004 4:53 PM
To: discussion at nsrca.org
Subject: RE: to tune the pipe


So Bill,
You would have loved watching this bit ...
Baby Brother was driving the then 12.0 second street-legal '69 Camaro down Interstate 80, with me driving alongside the rear tire, with my head out the window (think happy dod) listening for the "mellow sound" that indicated the RPM at which our left-to-right bank header crossover pipe was tuned. As you, no doubt, know, this pipe if placed correctly cancels the first anti-resonance of the headre, and improves the leave and short or 60-foot time. We got good at hand signals for, "now drive at 3000 RPM" and the like. We moved and re-welded that pipe twice to get it in the right spot.
 
Oh yeah, the burn spot trick! By my estimate, things worked best when you cut the pipe at 40% of a diameter longer than the burn spot.
 
Cool stuff, eh?
 


Bob Richards
bob at toprudder.com
http://www.toprudder.com
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