headers or tuner?

[BurningRubber]

do you use a timing light? i dont have marks on my crank pully cause i got ud pullies, ive never messed with the timing on a mod motor, just the other day i was usung my friends obd2 scanner it said my timing was 29* advance@ 3krpms but that was in netrual and sombody said it diiferent when driving

Base timing is what everyone is talking about. It advances quite a bit under throttle. Stock base timing is 10* if im not mistaken. Im running right around 15* on mine... it made a difference.

Each car is different though. Some will handle quite a bit of advance before they start pinging/detonation and some dont like much advance at all. Play with it in small increments to make sure the car isnt pinging. If it starts back it down a degree or two.

 

[Winters98GT]

I agree 100% with the above