The performance advantage of the open pipe is definitely
psychological...........and can remind someone that your car has been
ignited and is turned on....................Henry Morrison
----- Original Message -----
From: "Bill Babcock" <BillB@bnj.com>
To: "'Henry Frye '" <henry@henryfrye.com>; <fot@autox.team.net>
Sent: Thursday, May 22, 2003 10:05 AM
Subject: RE: Mufflers
> Simple, have a reasonable muffler on all the time. You won't get enough
> additional horsepower from an open pipe to make being a pain in the ass
> worthwhile (not that I think you are, Henry). There's an Alpha in my group
> that makes a godawful amount of noise as he circulates at the back of the
> pack. I'm sure he can't hear Peyote coming as I lap him--sometimes twice
> in a 25 minute race.
>
> -----Original Message-----
> From: Henry Frye
> To: fot@autox.team.net
> Sent: 5/22/2003 5:00 AM
> Subject: Mufflers
>
> Hi gang,
>
> I need to work out a few issues that cropped up at the Jeff 500 before
> Mosport. I need to run the car, and I guess either a chassis dyno or a
> track day will suffice.
>
> I can get 4 hours of track time or 1 hour of dyno time for about the
> same
> $$$. I think the track time is the better way to go, as I plan on
> changing
> out some parts for testing purposes, and I do not think I can get much
> value out of one hour at the dyno.
>
> The problem is the TR is really, really loud. The tracks that I can get
> to
> for testing have noise restrictions, looks like I need to be at or below
> 99
> dB. At the Jeff 500 I had a guy tell me my car was the loudest in the
> session. Doesn't surprise me.
>
> I am thinking I want to have a very low restriction muffler for track
> days,
> and a bypass pipe for race days. I am concerned about how the different
> backpressure will effect the engine.
>
> So how do you guys handle this?
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