boost pattern with downpipe

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Sep 18, 2001 | 01:41 PM

MattRX7

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Joined: Mar 2001

Posts: 53

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From: Fairfax, VA

boost pattern with downpipe

If I have a downpipe as my only mod, would the boost pattern change at all? Or should it stay at 10-8-10? I'm getting one put on soon and wanted to know what to expect.
Thanks!

Sep 18, 2001 | 08:01 PM

pp13bnos

Pineapple Racer

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Joined: May 2001

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From: Oregon

My pattern changed just slightly to just over 10psi, until i added an intake. Then it was a 11-14-11 on the dyno. But the good news was that the car made 233 or 235 rwhp at 11psi.

Later, CJ

Sep 19, 2001 | 04:52 AM

LT1-7

John

Joined: Mar 2001

Posts: 1,393

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From: Oregon

all I had was a catback and an intake. When I installed the DP my boost went from 11psi to 16. Be carefull!!

Sep 19, 2001 | 05:30 AM

Tad

Senior Member

Joined: May 2001

Posts: 316

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From: bay area CA USA

this is just a hypothesis,
but i'm guessing if you have a catalytic converter in there
somewhere, your boost should be ok.

But get a boost guage to be sure!!! you dont want to chance it.