Ladder bar car with bounce in suspension - Chevelle Tech
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post #1 of 17 (permalink) Old Jul 9th, 19, 8:43 AM Thread Starter
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Ladder bar car with bounce in suspension

I know this is mostly all chevelles but you look were you can and find insight on things regardless. I actually have a 68 camaro it weights 2760 with me in the car. It runs 5.80s in the 1/8 on 175 shoot. The car has been back halfed with 9" and qa1 single adj shocks with 190lb springs. Shocks set on 9 Ladder bar is set on the lowest hole, the front shocks are comp engineer 3 way shocks set at 80/20. I do no prep with the car. The car drives straight without hardly any actually driving the car. When I take it to the track to get a time on it after the car sits back down even on motor you can hear in the videos and even see it. The car acting like it's loading and unloading but as soon as I hit high gear it quits and starts pulling really hard. My question is how do I get the bounce out of the car? Do I need to tighten up the coil over springs on the rear or does it sound like I need a heavier spring rate for the rear
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post #2 of 17 (permalink) Old Jul 9th, 19, 9:28 AM
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Re: Ladder bar car with bounce in suspension

Why the 190lb springs?? You should'nt need more than 120 or so! Too much spring will do exactly what your car is doing- won't let the shocks do their job.

For reference, my Chevelle is around 3700 and I've got 150lb springs on Strange singles (ladder bar/coilover rear suspension). Your car is almost 1,000 pounds lighter..!!

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post #3 of 17 (permalink) Old Jul 9th, 19, 10:00 AM Thread Starter
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It was a starting point I didn't have an idea what the car was going to weight till I was done I'm going to get my wife to download a video of the car to YouTube and then I'm going to post the link on here and then y'all can get a better idea of what's going on with the car
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post #4 of 17 (permalink) Old Jul 9th, 19, 10:08 AM Thread Starter
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This is race ready weights
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post #5 of 17 (permalink) Old Jul 21st, 19, 11:24 AM Thread Starter
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Ok so I posted the wrong spring rate that's on my car. They are only 95s and are turned up about 2" from the bottom threads of the coil overs. Do y'all think that's it's still working against the shocks or do I need to stiffen up the rear shocks. Or let off of the spring about an 1" and readjust ride height with the brackets for the shocks
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post #6 of 17 (permalink) Old Jul 21st, 19, 11:54 AM
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Re: Ladder bar car with bounce in suspension

What rear shocks and what tire? Sounds like you need to control the shock extension rate.

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post #7 of 17 (permalink) Old Jul 21st, 19, 12:52 PM
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Re: Ladder bar car with bounce in suspension

i told you what i think is the biggest problem. call randy at fastshock and explain to him whats going on. get afco front shocks with the bnc valving
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post #8 of 17 (permalink) Old Jul 21st, 19, 7:27 PM Thread Starter
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It's qa1 single adjustable and it's a 28x10.5 but they are on 12" rims to get all the rubber to the ground
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post #9 of 17 (permalink) Old Jul 21st, 19, 9:02 PM
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Re: Ladder bar car with bounce in suspension

Quote:
Originally Posted by Ironman711 View Post
It's qa1 single adjustable and it's a 28x10.5 but they are on 12" rims to get all the rubber to the ground
Which 28 x 10.5? Bias or Radial? Big difference in shock settings. What air pressure?

Double adjustable rear shocks will resolve the issue.

Start with full stiff on compression and full soft on extension. Tighten extension a little at a time until bounce is gone.

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post #10 of 17 (permalink) Old Jul 21st, 19, 9:22 PM
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Re: Ladder bar car with bounce in suspension

ladder bar cars that are fast enough to run in the nines are far to violent to start full soft on extentions damping unless you want to beat the housing into the ground and roll the rubber off your slicks. start full stiff on rebound and try 4 clicks lighter and see how the car reacts.full light if anything will make it wheeler and harder on a sticky track. like i said start with better shocks on the front more compression damping and travel limiters. Actually I would sat the extension damping 4 clicks from Full stiff and then go to the front. Once you get that as good as you can get it then go back to the rear
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post #11 of 17 (permalink) Old Jul 22nd, 19, 7:36 AM Thread Starter
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It's mickey Thompson and air pressure is 10 1/2 after burn out they are 11. And I know double adjustable shock would fix the problem I'm just trying to finish out the season like it sits now and fix it over winter
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post #12 of 17 (permalink) Old Jul 22nd, 19, 8:24 AM
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Re: Ladder bar car with bounce in suspension

do you have travel limiter on the front suspension?
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post #13 of 17 (permalink) Old Jul 22nd, 19, 10:00 AM Thread Starter
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I do have them on the front end
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post #14 of 17 (permalink) Old Jul 22nd, 19, 10:02 AM Thread Starter
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They are not hooked up now though. I haven't gotten back to the track to test any lately to see if hooking them up changes anything yet. Would you hook them up the way the car sits or put a little pressure down on the front end before hooking them up
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post #15 of 17 (permalink) Old Jul 22nd, 19, 10:45 AM
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Re: Ladder bar car with bounce in suspension

i would start with you in it at ride hieght and set the limiters to allow 2 inches of travel. make a few passes. if it likes that try 1 inch if its worse go the other way. if you can adjust the rebound damping. i would try tightening that after your initial travel limiter setting. If you don't already have them hooked up and were running that way just the travel limiters will help a lot
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