Sorry for being vague, let me back up a bit. 69 Camaro stock susp, 275 Hoosiers with a BBC on 2 kits with a th400. Been fighting tire shake for over 2 months. Tires had several passes them, swapped to new tires I have gone up and down on tire pressure and up and down on shocks. The only way I know I can check the shocks is to pull them off and compress and extend them and feel for loose spots. They are qa1 singles. I had this thing 60fting 1.30 consistently before this all started. The car weighs 3560lbs. It does not shake on a motor pass. When this first started it only shook with both kits going, it didnt do it on the first kit.
The car is way slow now. I was blaming this on the summer air but last night we had temps in the 50's. I made a pass on a small kit: 60ft 1.42, 330 3.89, 660 5.90 at 122 mph. This is way off. I have a 3.55 gear and this should equat to 30% slip if I am figuring right. The tune seems to be spot on with the motor, nothing changed. Im just wondering if my problems were converter all along.
Yeah converter has a sprag. Earlier this year I tried doubles and couldnt improve on my best 60fts so I kept the singles. Again this thing was working pretty good. I forgot to mention above my rpm's are just over 6800 thought the traps in the 1/8, that dont sound right at all.