C3 suspension setup for road racing
Melting Slicks
Joined: May 2012
Posts: 2,192
Likes: 343
From: Allenton Wisconsin
Having a problem with the rear end stepping out when existing after the corner apex under acceleration. Has any one been running without the rear sway bar? How did that work? The guys at Van Steel suggested that when I got the QA1s from them.
Melting Slicks
Joined: Jan 2004
Posts: 3,247
Likes: 210
From: Detroit MI
I run the tiny stock 7/16" rear bar, which probably doesn't do much at all.
Last edited by 69autoXr; Oct 8, 2014 at 09:20 AM.
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
out of curiosity where exactly do you race your car in WI??
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 39
From: Fremont CA
Not a single inquiry on type of motor? You running a big block or small block? That 420/lb rear spring is pretty stiff about the same as the old Chevy " Daytona " racing spring....with that stiff spring you'll need stiffer front springs. I wouldn't run too big of a front roll bar the 1.125" factory bar or a 1" bar should work well with solid links. Good shocks....like Bilstein shocks from Guldstrand with " Sears Point " valving are a good baseline set up. There were 2 rear roll bars a small 0.4375" and bigger 0.625" bar, Ih wouldn't run anything bigger. Dialing in the ride height and suspension alignment will give good results and a decent racing seat like a Kirkey or Ultrashield aluminum seat and set of good racing belts. Fire system? I put that high on my list......
Melting Slicks
Joined: May 2012
Posts: 2,192
Likes: 343
From: Allenton Wisconsin
69 auto X-The toe in thing is a good point, I have offset TA purchased over 15 years ago. They weren't made right and as a result I cannot get any more toe in [all shims are stacked to the outside]. Setting now is 1/16 toe in. I'll try it with rear bar disconnected. Redvette- Road America and at the Mile with the SCCA. We run the infield 1.8 mile Fun as all ----. I just do HPDE. Too old to race against those young bucks. Solid LT1- SBC 411RWHP. Have the dual mount in the front as well, with QA1 duel adj in all 4 corners with 1 1/4 front bar. Corbau A4 chairs with 5 point belts. Fire system is on the to do list. Body height is the same measurement at all 4 [straight line center of axle to fender lip]. Doing my own alignment work now after numerous times to the alignment shop over the years. Going to try increasing + camber for next season, [just the front at first]. Keep the suggestions coming. Thanks T
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Joined: Apr 2017
Posts: 55
Likes: 1
69 auto X-The toe in thing is a good point, I have offset TA purchased over 15 years ago. They weren't made right and as a result I cannot get any more toe in [all shims are stacked to the outside]. Setting now is 1/16 toe in. I'll try it with rear bar disconnected. Redvette- Road America and at the Mile with the SCCA. We run the infield 1.8 mile Fun as all ----. I just do HPDE. Too old to race against those young bucks. Solid LT1- SBC 411RWHP. Have the dual mount in the front as well, with QA1 duel adj in all 4 corners with 1 1/4 front bar. Corbau A4 chairs with 5 point belts. Fire system is on the to do list. Body height is the same measurement at all 4 [straight line center of axle to fender lip]. Doing my own alignment work now after numerous times to the alignment shop over the years. Going to try increasing + camber for next season, [just the front at first]. Keep the suggestions coming. Thanks T
Heads are going to HVH . What all have you done ?
Melting Slicks
Joined: May 2012
Posts: 2,192
Likes: 343
From: Allenton Wisconsin
Fia69, you might of misread my reply. I was replying to cf member 'Solid LT1'. I'll try to remember the some of the specs of that engine, it has since been changed out. It had a Quick fuel 750 mech, DP, sitting on a Preformer Air Gap, feeding into Dart Pro 1s with 195 runners. The valve train had a Lunati solid roller, Crower lifters, Harlan Scharps 1.5 rockers. The block was prepped by C&S performance in Butler, Wi. with a Callies crank and rods with Mahle forged pistons. MSD ign. Final dyno tune was done at West Bend Dyno. T
