I have a 82 z/28 with the following

305 - runs and starts smooth, has a new cam that the previous owner put in but is a replacement stock cam

Edelbrock performer intake (no EGR)

Holley 750 vacuum, runs ok, carb might be to a bit to big- but thats all I had to put on it when I replaced distributer and CC carb

All computer stuff has been taken off, no AC, No CAT Converter, or stuff like that

Fresh tranny- built up- will catch rubber going into 2 and 3 gear

Fresh 3.73 Posi -

I know its not the fastes thing around, but if anyone has a guess I would be happy to hear it, it runs drives and starts good.

 

If you don't sit on the line spinning the tires, you'll probably run in the 15's.

 

no problem with tire spin at all.

Any guesses- after a cam change (222 duration at 50)

 

Sounds like a solid mid 15 second ride, low 15's if you can drive.

 

Sounds like a traction problem...

I didn't have traction problems when I went out for a time-only run on a regular race night and ran 14.4. A couple of weeks later, I went out on a "club" race night, spun so bad off the line I thought I had lunched the transmission, and ran a 15.5. That was with 2.93 gears and 245/50x16 GS-C tires.

Traction makes a huge difference.

 

Nope, never had tractions problems, maybe if I had single track rear end it would. - But I agree that traction does make a big difference.