as you will be able to tell i am green and just askin ?? can i put on a 3.5 pulley without tuning ?if i did w/out tuning what should i expect in performance gain will i damage the motor 1999 grand prix gtp 130000 miles
just askin
thanks
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01-11-2015
as you will be able to tell i am green and just askin ?? can i put on a 3.5 pulley without tuning ?if i did w/out tuning what should i expect in performance gain will i damage the motor 1999 grand prix gtp 130000 miles
just askin
thanks
01-11-2015
I second the notion.Originally Posted by chris99gtp
you can install whatever pulley you want, but without supporting mods, bad things will happen.
01-11-2015
do not do a pulley drop unless you install headers or a plog and down pipe. yes you can do it with out a tune.
01-11-2015
thanks i did read a post how to safely modify 3800 was very informative do shops do tuning ? what would i expect w/ headers and the 3.5 pulley can you hear the spark knock like old 350 1970s motors with the timing advanced to far?
01-11-2015
You wont hear it knocking, unless it was crazy bad.
The computer will pull timing within milliseconds to try and stop any damage, but if it's enough knock and under the right condition the computer can only do so much and you'll still end up with a chipped piston. Only 100+ octane could really save you without exhaust mods.
They knock from the factory, it's just motors/computers are calibrated in every single car.
01-11-2015
i say do the 3.5 pulley as the first mod. then you can do a new motor as the second mod.
01-11-2015
this guy knows whats up^^^^ lol
cause that knocking you cant hear or feel is doing this to your pistons.
01-11-2015
I did that ^ to my black car and it had a 3.5 pulley, headers, and a ported blower.
Originally Posted by The Sunfire Guy
01-11-2015
should have learned to tune.
01-11-2015
Ouch no bueno
01-11-2015
Goodness gracious, nuked two of them.
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