Can anyone tell me where I can find the spring compression rate for the front and rear spring on an 88 Z-28. Running a circle track car and need more spring on the right front, but I need to know what I've got first. By the way a third-gen is awesome on a circle track, I'm surprized there are not more of em out there.

 

F-bodys have been banned from many circle track classes because of unfair weight advantage and better handling.

There is very little difference if any in the rear springs. All third gens weigh roughly the same on the rear. IROC and WS6 cars may have a stiffer spring rate on the rear for better handling.

Front springs vary depending on model and original engine. I'd say go look for an IROC or WS6 car for a stiffer front spring.

 

F-Bodies are ok here, weight is not an issue car weighs 3515 lbs, and yes is handles great. I can buy aftermarket springs at different compression rates, just trying to find out what the factory compression rates are. Currently have a stock V-8 spring in the right front and a V-6 spring in the left front.

 

Prod# Code Service #
- - ---------------------------------------------------- (+) Highest load
rate
14029399 BZY 14029399 |
14029398 BZX 14029398 |
14029397 BZW 14029398* |
14029396 CDB 14029396 |
14029395 BXY 14029396* |
14029396 BXX 14029396* (-) Lowest load rate


Rear Springs
______________________________________________________________________
67 RS w/F41 susp
87 Z28 w/FE2 susp

Prod# Code Service #
- - ----------------------------------------------------(+) Highest load
rate
10018083 NNB 10018092* |
10018092 NNM 10018092 |
10018091 NNL 10018091 |
10018093 NNN 10018091 |
10032969 NYB 10018091 (-) Lowest load rate
(from a post by stingerssx)

I have yet to find a list of corresponding spring rates.
BZW's are about 548 lbs per inch