Traction Problem!
Yeah, I'll jump on the bandwagon...
That's the problem. My car, with a MISSING intake lobe(discovered shortly after racing), would run 15.6X's in 85+ degrees, with a passenger and a trunk full of tools/parts. Old crappy bias ply tires (bald by the end of the day).
I was only able to get 2.217-2.214 short times. Spinning the tires. And it'd only go thru the traps at about 86 mph! If your car pulls that kind of mph, yours should have my old one bad before the 60 foot mark.
Here's a few things I found that helped my car:
Adjustable pinion snubber. I found the tighter I cranked it, the better my car hooked. I eventually went to pre-loading it.
Mess around with timing. My particular car seemed to like a little more initial advance and reduced mechanical. Of course, that doesn't help w/o traction...
My Valiant's tires liked burnouts. The hotter I got 'em, the better they worked. Of course, they'd never completely hook up. Different tire compounds like different things.
Your mileage may vary. Hope it helps.
-bill