Originally Posted by bjuice
if its a street engine ..probably nothing...thats the way we use to set the timing back in the day..turn the timing up until it spark knocked then back it off a tad and lock her down.
if its a Race engine he could be missing a lot..these need to be on the Money for optimal performance..
DID it that way for years on my street car. Set it with a light to "correct" and slowed down.