Stock BOOST raising
Senior Member
Joined: 03-13-06
Posts: 1,004
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From: Michigan
That screw controls the effectiveness of the boost bypass into the manifold instead of through the supercharger. By turning that screw, you are only delaying the opening of the valve which will allow for higher amounts of boost.
It could have come adjusted wrong from factory and was set to open too much. Its a simple pressure difference mechanism with, essentially, another smaller throttle body.
I doubt allowing more boost on the stock pulley and tune will hurt anything. I had to take mine off when i ported and polished the inlets and outlets of the supercharger. When i put it back on, i adjusted it so it was set in its furthest shut position so it wouldn't bypass too soon.
It could have come adjusted wrong from factory and was set to open too much. Its a simple pressure difference mechanism with, essentially, another smaller throttle body.
I doubt allowing more boost on the stock pulley and tune will hurt anything. I had to take mine off when i ported and polished the inlets and outlets of the supercharger. When i put it back on, i adjusted it so it was set in its furthest shut position so it wouldn't bypass too soon.
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Joined: 10-03-06
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From: New Tripoli, Pennsylvania
it was such a struggle to get to 12.5psi when i was stock, as soon as i got on the highway after stage 2 was installed it would instantly go to 12.5 and increase as the rpm's got higher
it also took about 1500 miles to get over 10psi...
it also took about 1500 miles to get over 10psi...
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Joined: 06-21-07
Posts: 353
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From: Denver, Colorado
Guys,
If you notice he lives in Colorado so more than likely he's at a much higher altitude, which explains the 8 lbs of boost. Sea level is 12 like some of you stated.
I don't understand how he could have raised your boost pressure when all the bypass valve does is open and close. Opening it would make you lose pressure, closing it would just allow you to create pressure above atmospheric pressure but it's all still relative the speed of your compressor and air molecules.
It's possible he did something to how your boost gauge is reading your manifold pressure though.
In short, put it back to normal.
If you notice he lives in Colorado so more than likely he's at a much higher altitude, which explains the 8 lbs of boost. Sea level is 12 like some of you stated.
I don't understand how he could have raised your boost pressure when all the bypass valve does is open and close. Opening it would make you lose pressure, closing it would just allow you to create pressure above atmospheric pressure but it's all still relative the speed of your compressor and air molecules.
It's possible he did something to how your boost gauge is reading your manifold pressure though.
In short, put it back to normal.
Senior Member
Joined: 04-24-06
Posts: 1,948
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From: Chester, VA
I could believe that it raised his boost but it DEFINATELY wouldn't raise it above stock level. It could just be that it wasn't adjusted properly when he bought the car.....As for his friend being a guru.....well most of us (ss/SC owners) would look at his low boost and realize that he is bleeding boost somewhere......so where would you look??? i know I would check the bypass as well as other places.
I am in no way saying who is right/wrong or smart/idiot.....I'm just giving my opinion
I am in no way saying who is right/wrong or smart/idiot.....I'm just giving my opinion
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New Member
Joined: 04-26-07
Posts: 44
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From: Colorado
damn i guess i wont start it and maybe i read the gauge wrong but it was higher then it was when i bought it with 50 miles on it. and yes he has worked on almost every supercharger thank you and nope im not braging so its cool. but whatever its cool>>>>>>>>>
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Joined: 11-16-06
Posts: 95
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From: Fort Sill, OK
not making the boost i want to
well im not producing the boost i am suppose to be with my supercharger and i was wandering if it was because my wastegate is opening up too early......is there a way i can fix that to see if i can get the boost that i am suppose to be running? or what do i need to do? i have the stage 2 kit can i just unscrew the bypass valve for more boost i shouldnt lean out with the stage 2 on......
lol yeah i know.... mine does 170-175
lol yeah i know.... mine does 170-175
Last edited by stagezero; Sep 7, 2007 at 02:24 PM. Reason: Automerged Doublepost
Senior Member
Joined: 01-05-06
Posts: 10,877
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From: East Brunswick, NJ
well im not producing the boost i am suppose to be with my supercharger and i was wandering if it was because my wastegate is opening up too early......is there a way i can fix that to see if i can get the boost that i am suppose to be running? or what do i need to do? i have the stage 2 kit can i just unscrew the bypass valve for more boost i shouldnt lean out with the stage 2 on......
lol yeah i know.... mine does 170-175
lol yeah i know.... mine does 170-175
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