Vette rear suspension help

[vetteboy]

Looking for some help on my corvette rear end set up. It has the IRS with tom’s upgrades, QA1 double adjustable shock, and a L88 rear spring. The problem I’m having with the car is when it launches the rear drops about an inch and them rebound back a hundred time faster. It does the same thing in second. It feels like it wants to throw you through the front windshield. When I set the shocks on the tightest setting it seems to help a little. I only have four rounds on the car and as bad as it is I’m afraid that I’m going to wreck something before I get it figured out. So I have no idea witch way to go, do I make the rear spring stiffer or do I need to make it softer. I know I have to back off on the clutch setting and the front end probably needs some work(I have a set of morose springs and front shocks all the way loose). I will take video next time I go because it way to hard for me to explain. The car ran 11.60 at 116 and the 60’ 1.60. Thanks Brett

[Bobby Lundholm]

Contact Fred Lee he designed and patented his own bolt in replacement rear end for the IRS. I bet he can steer you in the right direction. Plus he's right here in Michigan.

http://etenterprises.com/contact/

[zedrone]

Brett,
Give Mike Dyer a call at 214-717-8379, he's built lots of 12 bolt C3 IRS's
and race car suspensions, I think you will find him alot of help.

Richard Mynatt (Zedrone)

[Chad Rhodes]

Shoot me an email speed.chad@gmail.com. Our car runs consistent low 1.30's (or 1.40 on the rear tires) with the same setup, except the rear spring.

[junior barns]

I think vetteboy is putting a 4 speed in his car?????

[Chad Rhodes]

Originally Posted by junior barns

I think vetteboy is putting a 4 speed in his car?????

Yes, but I know the issue he's having, and the solution.

[Ben Kallies]

PM Sent