thurman_merman

On a c4 specifically. On HH's chart it shows that the 1991 FE1 front spring rate is 93.1 Nm and the wheel rate is 26.7. For a 1992 Z07 the spring rate is 90.3 Nm but the wheel rate jumps to 29.4. Am I missing something here? I didn't think there were any suspension changes after 1988.

Nokones

The various rates did change from year to year but, the geometry should be the same. When I get home, I'll check my info and let you know if the data says the same thing.

thurman_merman

Thanks man.

Nokones

This is the data I have:

91 base spring rate 823.1 lb/in & ZO7 885.1 lb/in - 92.99 nm/100.0 nm
91 base wheel rate 225.5 lb/in & ZO7 284.7 lb/in - 25.4 nm/32.1 nm
92 base spring rate 708 lb/in & ZO7 885.1 lb/in - 79.9 nm/100.0 nm
92 base wheel rate 222.5 lb/in & ZO7 284.7 lb/in - 25.1 nm/32.1 nm

I hope this helps. Let me know if I can help with anything else.

thurman_merman

Your numbers seem to coincide with the spring rates where as the Hib Halverson chart seems off. Is there a chance the chart I'm looking at could be wrong about wheel rates? This is what I have been using as a reference.

Nokones

I really can't say if Hib's chart is incorrect nor can I say that my data is accurate. My data came from the Corvette Spec Book which is from the author of the Corvette Black Book by Mike Antonick.

thurman_merman

I'm just not going to worry about it then. I'm trying to balance this new setup I'm working on in my mind and I was confused about how it could be so different. Thanks for looking up the info.

l98tpi

If you want to balance your car, the best way is to get set of scales and get to it

Nokones

And don't forget to disconnect your swaybar(s), set tire pressures, check the fuel level, and put the driver's weight in the driver's seat.