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Author Topic:   Rocks like a boat
Hendrix#54
Dirt Roller

Total posts: 14
posted July 04, 2005 03:31 PM  
I have a 85 grand prix factory stock. This car works pretty good, but in turns 3 & 4 it has a bad bouncing problem. We have made some changes to try to stop this but havent made much progress. I talked to Rex Merritt and got a new setup on shocks car seems to be better but still bounces to much. I feel like this is unhooking the left rear to much and getting my car loose of the corner. I run 900lf, 1100rf, 225lr, 175rr, with 53.4 rear%, 52.2 left%, and 50.9 cross I have around 100# of bite currently because track has been slick come feature time. I am currently leading points at my local track but feel like I could be faster if we could get this fixed. Any help would be greatly appreciated.

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 04, 2005 05:21 PM  
I run 13 inch in the rear and 9.5 in the front. We run on a high banked 3/8 mile. All stock location shocks and springs. I have had a few people tell me to stiffen my springs but dont want to sacrifice any forward bite.

o5racer
Dirt Freak

Total posts: 402
posted July 04, 2005 09:27 PM  
What is your total weight? What are you running for shocks now?
Nick

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 04, 2005 10:12 PM  
stiffer spring will make it bounce more. you need to have stiffer shocks

Hendrix#54
Dirt Roller

Total posts: 14
posted July 05, 2005 08:52 AM  
I think I will try the 1200rf and 1000lf it is a pretty fast track and we run the pure street class last year with a stiffer spring setup and didnt seem to have this problem but everyone says softer is faster. This is my first year in factory stock so I am still learning. Also was wondering I have read all this info on trailing arm angles, my uppers only have about 8 degrees down to mounting points on frame when measured on the top. Do you guys measure off the bottom of trailing arm or on top side to get your 15 degree angle? thanks for your help.

    

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