proper exhaust size for STS autocross car
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Senior Member
Joined: Jun 2002
Posts: 499
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From: San Diego, CA
proper exhaust size for STS autocross car
Ok, I'm tryin to figure out how much bigger, if at all, an exhaust I should go with to set my 91 CRX Si up for STS autocross racing...
STS allows just boltons. Intake, headers, exhaust. Emission controls have to remain, but they do allow a programmable ECU. So, keeping those in mind, should I go with...
a 2.00 inch exhaust from the catylitic converter back?
a 2.25 inch exhaust from the cat back?
a 2.5 inch exhaust from the cat back?
or...should I go with some custom size like a 2.1 inch?
thanks guys
STS allows just boltons. Intake, headers, exhaust. Emission controls have to remain, but they do allow a programmable ECU. So, keeping those in mind, should I go with...
a 2.00 inch exhaust from the catylitic converter back?
a 2.25 inch exhaust from the cat back?
a 2.5 inch exhaust from the cat back?
or...should I go with some custom size like a 2.1 inch?
thanks guys
I
Joined: Jan 2001
Posts: 56,525
Likes: 0
From: Westside til I die
I'd say 2.25"....2.5" is a little extreme on a single cam.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget
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