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Author Topic:   4 bar spring question
driver27
Dirt Maniac

Total posts: 194
posted May 02, 2005 10:32 AM  
Does anyone run a stiffer sping on the right rear vs the left rear on a straight 4 bar car? Thinking of reversing rear sprins to a 225rr and a 200 lr to fix a chronic loose in, tight off condition.

Thanks

rocket36
Dirt Freak

Total posts: 209
posted May 02, 2005 01:56 PM  
we do (run a stiffer rr spring than lr spring) on our "open engined" late model on one track in particular - 3/8 mile, tacky, momentum track.
we moved to this setup upon the recomendation by the guys at rocket, when we just couldn'y find a setup that i felt comfortable with. this is actually one of the base line setups of rocket's from 2004 onwards, they refer to it as "the big right rear spring" setup. i believe they usually recommend this deal (as a base line) for semi slick tracks, where side bite is more critical than forward bite and for higher speed, rough tracks. i think it is commonly used at eastbay.
steve hendren also suggested i try this setup after contacting me through this forum.

driver27
Dirt Maniac

Total posts: 194
posted May 03, 2005 06:14 AM  
THanks for your reply, your description of a semi slick track sums our track up pretty good, its a hard momentum track that never gets slick in a classic sense, but couldnt be called tacky either. Im gonna give it a shot and see.

Any thoughts on pull bar angle? Since your a late model guy I guess you know lift bars pretty good, but I was wondering if you or anyone had tried running a long pull bar with very little angle? Its been suggested that too much angle in the bar can cause a loose in condition, but im not sure.

Thanks

rocket36
Dirt Freak

Total posts: 209
posted May 03, 2005 09:26 AM  
let us know how you go with that big right rear setup. as for the pullbar, sorry, i don't know anything about them. i think zeroracing maybe the one to help.

dirtzone
Dirt Maniac

Total posts: 102
posted May 04, 2005 03:48 AM  
more pullbar angle = more bite. but, for less time. just like shortening the spring/coilover on a liftbar. it responds quicker, but unloads sooner down the chute. hope that helps.

driver27
Dirt Maniac

Total posts: 194
posted May 04, 2005 06:22 AM  
WIll let folks know how it works, when i get to run it. I know more angle in pullbar equals more initial bite but for shorter, and visa vera, but what im curious about is how pull bar angl effects corner entry, particularly off the gas.

Thanks

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