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1999 Grand prix... Looking to run a 3.4 pulley

Don't forget a tune.

Brandon's GP on a 3.4 had all of these and was still only managing 8* timing on the stock tune.

Needless to say it was slow as balls.


I was able to get his to 13* and 1-2* blips of KR mostly at the shift by tuning it while maintaining an AFR of approx 11:1
with ambient temps in the low-mid 50's

High timing will require valvetrain mods or stupid rich AFR. No way around it.

Did a few 0-100 pulls and im pretty confident it will run high 13's-14 flat with a good launch.
 
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I need a better damn tune and this thread reminded me of that one e canned helps but its just not the same warm feeling
 


car is as slow as on stock pulley is what happens.

at minimum a tune, headers, intake.....and you wont be running very much timing without dumping a **** ton of fuel to compensate.

i'd say add rockers/springs to the list and you will have a solid 250whp setup.
 


Ok i think a lower pulley would be alright since i only stomp on the gas in dire situations or when punks are about :) Which is rare ever since i got my gtp :(
 
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