Great question Brian. I've been having that same thought myself. Even
though I've put a mild street cam in and milled my head for more
compression, I've retained the stock exhaust because I like the sound but
feel I'm losing the potential of all the modifications I've made. What I've
done has given me more kick in the pants but I was wondering if the stock
exhaust with a good header might kick me a little harder without the louder
exhaust note. Can someone help?
Dave Mahlmeister
72 tr6
----- Original Message -----
From: "Brian Finck" <brian.finck@powerhouse.ca>
To: "'Robert M. Lang'" <lang@isis.mit.edu>; "Shane Ingate"
<madmax_xx@hotmail.com>
Cc: "6 Pack" <6pack@autox.team.net>
Sent: Thursday, October 03, 2002 12:36 PM
Subject: RE: TRF headers [was "Magic Clutch" Kit by TRF]
> Hey Guys,
>
> I like the look and sound of my stock exhaust system, but would not be
> opposed to a little more power. My engine is in stock trim, nothing with
> stock exhaust. Would retaining the stock muffler set up totally defeat the
> effects a good header. I am totally aware that a properly tune exhaust,
> along with head work, cam, carburetion, etc, etc, is the best way to make
> really good power, but, would a good header, with the stock exhaust be
worth
> spending money on, or would the increase be too small to bother with?
>
> Brian Finck
> '75 BRG TR6
>
> -----Original Message-----
> From: Robert M. Lang [mailto:lang@isis.mit.edu]
> Sent: Thursday, October 03, 2002 2:05 PM
> To: Shane Ingate
> Cc: 6 Pack
> Subject: Re: TRF headers [was "Magic Clutch" Kit by TRF]
>
> On Thu, 3 Oct 2002, Shane Ingate wrote:
>
>
> [stuff deleted]
>
> > The Group 44 headers move the powerband significantly to higher rpm than
> > other headers currently available. I suspect that the builders of the
> repro
> > knew this, and attempted to shift the power-band to lower revs by using
a
> > 1 7/8" collector. I have this system, and I believe it works as
intended,
> > but in my mind it does negate the advantages of using 1 1/2" tubing. I
do
> > not have any dyno information to support this statement.
>
> This is why some of us re-work the collector on the secondary pipes to get
> 2.5" pipes all the way to the back of the car.
>
> There's nothing wrong with power at 6000 RPMs.
>
> :-)
>
> > On a near-stock or mild motor, I doubt if you will notice any difference
> in
> > power over a cheaper header, but with a built motor and revised
collector,
> I
> > would expect to see significant difference on the dyno.
>
> Au contriare! A good header on a stock motor will yield power increases,
> but these turn out to be at the upper range of the power curve.
>
> Remember a Fed. Spec TR6 is roughly 100 HP in stock form. Make it breathe
> better and get rid of the fan and you're in the 120 HP range easily. The
> header is probably the most important part of that equation. Throw on
> Webers and a header and tuned exhaust and you can get that number into the
> 130 HP range.
>
> > Shane Ingate in Maryland
>
> rml in Boston
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