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07-29-2005 #21
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- Join Date
- Jul 2005
- Posts
- 202
I have a 1990 C4 track car with an IRS and a 1970 mach I with leaf springs (currently) and a heavily modifed front end. I've taken both cars road racing a lot and the solid rear isn't that bad. I'm also running a black gold torque sensing diff with global west spring bushings and they help a lot. The only time there is really a substantial difference is cornering on really bumpy roads. Otherwise the IRS isn't really a large benefit.
Leaf springs for lateral location still are not good for the track so I'm going to a torque arm with a watts link and a cambered rear. For the street it's probably not worth it. I'd try some simple bolt-on solutions with the solid rear.
Good luck
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