Help please with a chassis question
Ok at the track this past weekend I had what seemed to be tire shake but it didn't spin. It just vibrated on the launch and then cleared up. This has had me puzzled and can't figure it out. First I thought it may be the pinion angle but others on another site don't think that is the problem that most of the time improper pinion angle will cause problems on the upper end of the track. Right now I have +3 on the rearend and -4 on the transmission so this would make my pinion angle -1. What are your opinions on this? Just picture the first 100' feeling a vibration like a tire shake or something and then just clear up after the 100'.
This is a 1984 Chevy S10 stock suspension with Slide-A-Links, Calvert Racing Mono Leafs, Rancho 6000 rear adjustable shocks with 12 settings, front is QA1 "R" Series coil overs. BBC615 Big Chief engine with 3 stages of nitrous. This weekend was first pass out and was on motor only and NO spray.
All help will be greatly appreciated.