So I took my car to the track, it ran fine ( got a 14.2 as my best ) for the timing I HAD it set on ( which was done by previous owner ) .

after talking to some guys about how my car runs lean they did a timing test and It was set at -12 I'm pretty sure ( based off a standard base 10 timing ), they then set it at 10 base. It ran like shit and I only got 16s avg. Then they set it to 5, still ran like shit.

My question is, is negative timing really that bad? I've been running on -12 or w/e for a WHILE now ( over 5000 miles atleast ) and no problems what so ever.

I just picked up a timing light and going to adjust it after reading your guys opinions first.