Join Date: Apr 2000
Location: Danville, CA USA
If this is going to be a pure drag race car, you need to raise the nose of the IRS and/or lower the rear of it to increase the amount of antisquat. If the car is ever driven on the street don't do this. The higher the cg height is in the car, the more the IRS needs to be tilted to end up with 100% AS.
Welding the IRS subframe to the frame is fine, but you should only weld three points, then make the fourth point bolt together with shims. This way the the subframe will not be warped when it is welded to the frame.
For drag racing, you can replace all of the pivot points with spherical bearings.
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