Pontiac Grand Prix Forums : Grandprix

How much boost am I getting from the stock 3.8" pulley and If you have any idea how much will I get once I put on the 3.4" pulley? Thanks!

do you have mods to support the 3.4"? stock is 7.5 psi, with a 3.4 look to get about 10 psi

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99 GTP Mods: Performance: obx headers, 3.4, 1.9's, ported tb, ported m90, ported lim, water meth, full exhaust, k&n, tb spacer Visual: painted trim, black corners, mesh grilles.

Yeah I may even have enough supporting mods for a 3.25" but Im gonna stick with the 3.4" for now. But I dont really want to take a chance screwing up my car, but thanks!

yep, been there done that, no bueno

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99 GTP Mods: Performance: obx headers, 3.4, 1.9's, ported tb, ported m90, ported lim, water meth, full exhaust, k&n, tb spacer Visual: painted trim, black corners, mesh grilles.

u need a scanner, imo that should be everyone's first mod...

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99 GT- L36:GenV:N*:1.9 rollers:Pacesetters:slp catback:3ep trans:Intense Input shaft:stock pulley
BPC member

intercooler , first mod. scanners are nice, but thats all they do. if you buy an intercooler, you know that you have no kr for sure lol

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99 GTP Mods: Performance: obx headers, 3.4, 1.9's, ported tb, ported m90, ported lim, water meth, full exhaust, k&n, tb spacer Visual: painted trim, black corners, mesh grilles.

u mean like a radar scanner? If so im well prepared with the Valentine 1... ive never been caught... yet!

O! lol ! my bad ... hey its been a long day

boost all depends on flow mods. if the motor cant breath its gonna boost high as hell because well it cant go no where. if you have flow mods its not gonna boost as high.

all boost is, is the stack up of air.

you could take a 3.4 pulley and one guy might boost 12 while another only boost 8. the guy with 8 is probably faster cause his motor can use the air effectivly. so effective that it eliminated 4 pounds that were just sitting around waiting to get used, now they are being used.

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white 04 comg G gtp. wizair, pacesetters, slp 1.8 rr
its slow.

Not really...just because you have a IC doesn't mean you won't have knock.

LOL wooooooow.

Go back to Russia. We don't need your shaking head tourettes crap over here.

Everyone has their off days...but a police radar? LOL

Right...I had a buddy run nearly 17psi on his 3.4 on a average temp. day when I could barely touch 15 on my 3.1" on a 40* night

KNOCK KNOCK KNOCK LOL

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2003 Blue-Black Metallic GTP Sedan - Almost Done...
2007 Gold Mist Chevrolet Cobalt LT - Custom CAI, NGK V-Power's, Muffler Delete, Custom Tuned PCM...Sure does have every bit of 130 FWHP
http://www.cardomain.com/id/03blueGTP

yes, but you have to admit its gonna be a pretty far stretch for a 3.4 to have knock on an ic setup.

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99 GTP Mods: Performance: obx headers, 3.4, 1.9's, ported tb, ported m90, ported lim, water meth, full exhaust, k&n, tb spacer Visual: painted trim, black corners, mesh grilles.

Yeah but then again how many people are going to be running a 3.4" on a IC setup anyways

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2003 Blue-Black Metallic GTP Sedan - Almost Done...
2007 Gold Mist Chevrolet Cobalt LT - Custom CAI, NGK V-Power's, Muffler Delete, Custom Tuned PCM...Sure does have every bit of 130 FWHP
http://www.cardomain.com/id/03blueGTP

damn, 17 pounds on a 3.4, did he have a block off plate in the exhaust or something ???

i only see about 5 pounds in the mid rpm range, guess its time to pulley it

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white 04 comg G gtp. wizair, pacesetters, slp 1.8 rr
its slow.

IMO he was boost stacking like crazy and has one factory freak of a car...as it ran with my cammed car on a 3.4"

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2003 Blue-Black Metallic GTP Sedan - Almost Done...
2007 Gold Mist Chevrolet Cobalt LT - Custom CAI, NGK V-Power's, Muffler Delete, Custom Tuned PCM...Sure does have every bit of 130 FWHP
http://www.cardomain.com/id/03blueGTP

Wow, thanks for the warm welcome. You seem to treat alot of people like crap on here. I bet if we were to meet you would never say that to my face. Usually guys who treat others like crap on the internet have serious security issues. Does it make you feel strong? Maybe you should show some respect and thank me for fighting for your freedom everyday you little coward.

Hmm...seems like your only the second person to say that. It is only when you have like 5 posts or whatever and half of them are argumenative...it sure isn't a nice way to com across as a new member...follow? I've been to help alot of people. And I was only posting negativity back. If you can't take it then don't dish it out...trust me...there is arguement here.

And yes...it makes me feel like I just shot up my daily dose of steriods sitting here typing back to you. It is awesome.

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2003 Blue-Black Metallic GTP Sedan - Almost Done...
2007 Gold Mist Chevrolet Cobalt LT - Custom CAI, NGK V-Power's, Muffler Delete, Custom Tuned PCM...Sure does have every bit of 130 FWHP
http://www.cardomain.com/id/03blueGTP

The roids will end you son.

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99 GTP Mods: Performance: obx headers, 3.4, 1.9's, ported tb, ported m90, ported lim, water meth, full exhaust, k&n, tb spacer Visual: painted trim, black corners, mesh grilles.

It is the best...I get angry about everything

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2003 Blue-Black Metallic GTP Sedan - Almost Done...
2007 Gold Mist Chevrolet Cobalt LT - Custom CAI, NGK V-Power's, Muffler Delete, Custom Tuned PCM...Sure does have every bit of 130 FWHP
http://www.cardomain.com/id/03blueGTP

No, I dont follow but Im all ears. If I insulted anyone or stepped on any toes I do appologize but I dont really see what you are getting at... please show me where I have posted to be argumentative? Telling someone to go back to their country of origin is rude and is probably why the US has such a bad rep because of ignorant little pr!cks like you. I came here after 911 to help with the war and I would love to go back and see my family but unfortunatly, the wars not over.