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Aug 22, 2005 | 10:57 PM

big_G

Thread Starter

Le Mans Master

Joined: Jul 2005

Posts: 5,752

Likes: 4

From: Austin Texas

Pipe Dreams

Track rats...On 400+ hp. engines, what diameter exhaust pipes are you using? Backed up with dyno. info? TIA

Aug 22, 2005 | 11:38 PM

big_G

Thread Starter

Le Mans Master

Joined: Jul 2005

Posts: 5,752

Likes: 4

From: Austin Texas

ttt

Aug 22, 2005 | 11:46 PM

Guru_4_hire

Team Owner

Joined: Apr 2002

Posts: 62,198

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From: All humans are vermin in the eyes of Guru VA

Cruise-In IV Veteran

Cruise-In V Veteran

http://superchevy.com/technical/engi...t/0505phr_exh/

Aug 23, 2005 | 07:44 AM

brianlewis60

Instructor

Joined: Jun 2004

Posts: 169

Likes: 0

From: Arlington Texas

3 1/2 inches

got 3 1/2" pipes back under car on 598 c.i. BB with almost 900 hp

Aug 23, 2005 | 07:56 AM

Vesa

Burning Brakes

Joined: Mar 2004

Posts: 816

Likes: 1

From: Finland

Quote:

Originally Posted by brianlewis60

got 3 1/2" pipes back under car on 598 c.i. BB with almost 900 hp

very comperable

Aug 23, 2005 | 07:57 AM

Vesa

Burning Brakes

Joined: Mar 2004

Posts: 816

Likes: 1

From: Finland

Quote:

Originally Posted by big_G

Track rats...On 400+ hp. engines, what diameter exhaust pipes are you using? Backed up with dyno. info? TIA

I definitely would choose 2 1/2 dual exhaust with Dynomax or something alike...and later if you tune more you might weld in cutout right after collectors like I have...

Last edited by Vesa; Aug 23, 2005 at 08:15 AM.

Aug 23, 2005 | 08:11 AM

Gordonm

Race Director

Joined: Dec 1999

Posts: 19,610

Likes: 778

From: Forked River NJ

I am around 420 HP on mine and the 2 1/2 works fine. The guy who built my exhaust said a good 2 1/2 system will work until about 500 HP. A lot depends on motor size and rpm you will be running. I turn 6500 to 7000 rpm on a 350 motor.