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boost question with H/C setup

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Old Nov 27, 2011 | 04:50 PM
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Default boost question with H/C setup
Im in the middle of a H/C setup on my zo6, i have the 3.85 pulley on right now which got me 8 psi. im thinking of going down to a 3.6, what would that take to to (boost)?

port & polsih 243 heads
Epp blower cam
patriot double spring
tsp ported oil pump
kateck timing chain
arp head studs
mls head gasket
Harland sharp roller rockers
Meth kit
Lg ltd headers
Corsa pace car exhaust
Ram twin disc clutch
Last edited by CHIWS6; Nov 27, 2011 at 05:51 PM.
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Old Nov 27, 2011 | 04:55 PM
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Originally Posted by CHIWS6
Im in the middle of a H/C setup on my zo6, i have the 3.85 pulley on right now which got me 8 psi. im thinking of going down to a 3.6, what would that take to to (boost)?

port & polsih 243 heads
Epp blower cam
patriot double spring
tsp ported oil pump
kateck timing chain
arp head studs
mls head gasket
Meth kit
Close to 12 psi...
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Old Nov 27, 2011 | 04:57 PM
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Originally Posted by robert miller
Close to 12 psi...
WOW! i definitly dont want that. if i keep the same pulley would i still be at 8?
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Old Nov 27, 2011 | 05:36 PM
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No will not be at 8psi anymore. Do you have headers already?
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Old Nov 27, 2011 | 05:40 PM
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Originally Posted by SBCGENII
No will not be at 8psi anymore. Do you have headers already?
I forgot to add that, ill add that to my 1stfriends post
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Old Nov 27, 2011 | 05:53 PM
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If you are just changing pullies.. you gain a real world 1.5 psi with a .2 inch drop in pulley size.. been there, done that... rule of thumb is .1 inch is 1 psi... under normal situations
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Old Nov 27, 2011 | 08:35 PM
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Keep the info coming fellas, Btw this is a p1 kit with twin intercooler with the air filter over the radiator
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Old Nov 27, 2011 | 09:01 PM
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I have the same car, same blower almost the same setup, a 3.6 got me right at 10-11 psi, depending on when I shifted. Heads, cam, full exhaust, self ported 243's.
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Old Nov 27, 2011 | 10:41 PM
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Originally Posted by p1bz
I have the same car, same blower almost the same setup, a 3.6 got me right at 10-11 psi, depending on when I shifted. Heads, cam, full exhaust, self ported 243's.
lol ur right about pretty much the same thing. thats to much boost for me. i guess i'll just keep my 3.85 for now and see what she does.
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Old Nov 28, 2011 | 11:20 PM
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Do you have the Ram Force 9.5 clutch? And, if so, how do you like it? I have a Centerforce DFX, but I want a lighter pedal.
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