Quote Originally Posted by Vteckidd
neither

Set it to factory settings an leave it unless you can tune a car.

And unless you can really understand what retard and advancing the ignition timing does, theres no need in changing it. You leave the timing where the best burn occurs and you get the most cylinder pressure

you cannot do that by guessing. You have to have a dyno, wideband, tuning software and be able to read it.

USUALLY in most BOOSTED setups you will end up backing timing down as the turbo/supercharger is feeding super dense air into the chamber, so you can get a pre-ignition event under normal timing conditions. =BAD

NA setups, it just depends on too many variables, cam size, intake size, header size, etc. Timing depends on where the motor likes to be run
Um no.