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Joined: Aug 2004
Posts: 169
hs2g
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hs2g Apr 13, 4:29am - #441256 
1997 Red Toyota Celica GT
Member
1997 Toyota Celica GT

Joined: Aug 2004
Posts: 169
St. Cloud, Minnesota
Exhaust on a turbo

I know that on a turbo car you need at least a 3" diameter pipe. Is the pipe gonna be from the catalyc converter then straight back? Or do you eliminate the cat. And I assume it has to be a straight pipe correct?
Joined: Feb 2005
Posts: 164
WhiteCeli
Member
WhiteCeli Apr 13, 4:47am - #441257 
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Joined: Feb 2005
Posts: 164
HI
it could be from either one. If you elminate your cat, you have more straighter airflow which makes your exhaust free flowing. Also by elminating your cat you gain power up top but lose some down low.

As for the exhaust, the minimum isn't 3". Sometimes that is too large for the amount of boost you are running. 2.5" is probably more ideal for running 6 psi. Higher boost is for 3" or maybe even 10 psi.
Joined: Aug 2004
Posts: 169
hs2g
Member
hs2g Apr 13, 5:19am - #441258 
1997 Red Toyota Celica GT
Member
1997 Toyota Celica GT

Joined: Aug 2004
Posts: 169
St. Cloud, Minnesota
I am probably running 5-8 PSI so a 2.5-2.75 pipe would be ideal right? I here its gonna pull a CEL if I remove the cat. So is it really must? Or can it still work?
Joined: Jun 2004
Posts: 1,337
celicadragon
Specialist
celicadragon Apr 13, 5:15pm - #441259 

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2002 Toyota Celica

Joined: Jun 2004
Posts: 1,337
Pittsburgh, PA
just get a 2.5 keep the cat

respect the gt-s
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