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low boost

A

andrewdg1983

New member
Hey new to the forum, anyways, i have a 2000 gtp and im only getting 6 pounds of boost untill i hit around 4,000rpm then it spikes to 9 and stays there untill i let off. can anyone help with that, trying to tune and its impossible with that boost creep.

mods are
northstar kit
ngk tr6
stock pulley size
 


I'll tell you one thing...TB is worthless since you have no mods and the plugs you have are way too cold.
 
That's pretty much the stock boost on these cars. If you get any higher than that on a stock pulley, then it would mean you have exhaust flow problems.
 
bluegtp91 said:
I'll tell you one thing...TB is worthless since you have no mods and the plugs you have are way too cold.
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easy champ he has the 3.4 pulley and headers coming. He did the TB mod because we have a hook up and got the TB for damn near free and a MAF for free. The 3.4 pulley is going on then headers then I hope to convince him to go turbo!
 
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Juanmiguel said:
That's pretty much the stock boost on these cars. If you get any higher than that on a stock pulley, then it would mean you have exhaust flow problems.
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So you think the boost creep is being caused by exhaust flow issues? He did get some patch work on his exhaust that sucked.. its pretty restrictive
 
I was doing 9 psi peak a few days ago on an almost stock setup. I asked around and everyone said that's what they push from factory. I installed a 3" DP and deleted the cat which was clogged like two days ago and now its doing like 6 psi peak with the other mods in my sig.

In overall, the better you flow, the lower psi you'll get. There was a thread about how much boost everybody was doing here not long ago. There's more explanation about it in there.
 


Ya the car has 137,000 on it so i would think the cat has got some wear to it. Thanks for the info. To that other guy lol what a moron.
 
andrewdg1983 said:
Ya the car has 137,000 on it so i would think the cat has got some wear to it. Thanks for the info. To that other guy lol what a moron.
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Right...well considering a N* pedal feel is sh!t whether it is free or not, who cares. You don't need a bigger TB until you get rockers/cam or a pulley smaller than a 3.4" for sure. Should have hogged out your stock TB or got a LS1 and just had the bracket rewelded. So since you know everything...I mean...you should know a TB is pointless at your mod level...so yeah, moron?
 
andrewdg1983 said:
Ya the car has 137,000 on it so i would think the cat has got some wear to it. Thanks for the info. To that other guy lol what a moron.
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you sir need to know who your talking about before you go insulting people..bluegtp91 knows more about these cars then most on this board. if you think your northstar tb is doing anything on a stock car then YOU are the moron. i hope your air/fuel ratio is outa wack now and running lean so we can all have a good laugh when it breaks :th_thumbsup-wink:
 
alright i didnt come on this forum to bicker with a bunch of *****es, my question was not about what my mods are and i dont need aproval from anyone about what i have done to my car, i was asking a simple question about boost creep till smartass jumped in with his coment.
 


AmericanSoldier said:
you sir need to know who your talking about before you go insulting people..bluegtp91 knows more about these cars then most on this board. if you think your northstar tb is doing anything on a stock car then YOU are the moron. i hope your air/fuel ratio is outa wack now and running lean so we can all have a good laugh when it breaks :th_thumbsup-wink:
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hahahahah are you serious you are a moron.. i have more horsepower than you clowns will ever have so do you know who your talking to??? He has the northstar kit cuz it was free MORON! and because he has supporting mods are on the way MORON! P.S. he isnt lean because I have tuned the MAF in with HP tuner.. oh did I mention I tune cars and I have 700HP MORON... so next time before yo run your mouth figure out who your talking to
 
a) those are normal boost levels for stock. it will always spike in the high rpm no matter what pulley or motor setup you run.

b) blue is right on everything he has said.

c) who the **** cares if you have a 700 hp gto, that has nothing to do with a grand prix and how to mod it. get a life.
 
This got a little out of hand.... The advice i give, is... on a STOCK throttle body, and a STOCK m90 case, and a STOCK motor, that car will make more power with a turbo kit than wasting money on an m90 setup. Turbo's are and always will be much better than a blower until you get into top fuel cars, then there's just no turbo that can make power that instantaneous.
 
Bio248 said:
a) those are normal boost levels for stock. it will always spike in the high rpm no matter what pulley or motor setup you run.

b) blue is right on everything he has said.

c) who the **** cares if you have a 700 hp gto, that has nothing to do with a grand prix and how to mod it. get a life.
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who cares? have you ever felt that kind of power?? obviously not... but here these guys are ****ting on my buddy for having a mod... so i decided to **** on them for being dicks. The dude has spent a FOTUNE on this car and runs a 13.4 and that gives him the right to **** on my buddy?? Horsepower talks NOTHING ELSE!
 


Turbo4door said:
This got a little out of hand.... The advice i give, is... on a STOCK throttle body, and a STOCK m90 case, and a STOCK motor, that car will make more power with a turbo kit than wasting money on an m90 setup. Turbo's are and always will be much better than a blower until you get into top fuel cars, then there's just no turbo that can make power that instantaneous.
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I agree
 
twinturbogto said:
who cares? have you ever felt that kind of power?? obviously not... but here these guys are ****ting on my buddy for having a mod... so i decided to **** on them for being dicks. The dude has spent a FOTUNE on this car and runs a 13.4 and that gives him the right to **** on my buddy?? Horsepower talks NOTHING ELSE!
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LOL I ran a 13.4 on a 3.4" pulley...with 10psi...and headers...and a cam. With about a grand or so worth or work. So good job knowing nothing as I don't really give 2 cents about car domain anymore...but thanks for trolling and checking everything out :D

Whooptie do. I'd like to see time slips of your car. Or pics for that matter. Oh wait...I could care less...I was giving you 2 honest TRUTH, but if you don't like to you can stick it up your ass. As for the horsepower talks statement...your more ignorant than your friend...horsepower sells, torque wins races...go learn that quote. I bet you can't even put 700 horsepower to the ground..you probably run a 14 flat at a billion MPH.
 
once again, who cares how much power youre making? i bet a got an $1800 crotch rocket in my garage that'd spank you. it might make 100 whp. whoopie.

i told you want you wanted to hear. youre not going far without a lot into the motor with these cars. 300 whp is a lot of power with an m90 setup and 400 whp is a lot with a turbo setup. even then youll still be FWD, have traction problems, and run way slower than it should because you either wont be able to drive it right or you wont run slicks on it (and if you do then say bye to your transmission).
 
Bio248 said:
once again, who cares how much power youre making? i bet a got an $1800 crotch rocket in my garage that'd spank you. it might make 100 whp. whoopie.

i told you want you wanted to hear. youre not going far without a lot into the motor with these cars. 300 whp is a lot of power with an m90 setup and 400 whp is a lot with a turbo setup. even then youll still be FWD, have traction problems, and run way slower than it should because you either wont be able to drive it right or you wont run slicks on it (and if you do then say bye to your transmission).
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I would love to see your 1800 crotch rocket run 9s.. by the way im really confused at why you guys don't care about horsepower? Why spend all this money and time if not for horsepower?
 
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