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Author Topic:   coil over spring rate
mmpsportsmanrookie
Dirt Newbie

Total posts: 3
posted March 16, 2005 07:43 PM  
we are a totally new race team with no experience. my questionn id on rear springs for a coil over car which is a 2000 olsen. looking for a rough estimate on the rear spring rates. right now i have a 175 on the rr n a 220 on the lr. are they close or way out there.

racerwilson
Dirt Freak

Total posts: 357
posted March 17, 2005 07:07 AM  
Ok first it is close, 2nd What track are you racing at, and in what class? Also what tires? I can get you in the ball park for a set up. I raced Olsen cars for years, one of my best seasons was in a 4 coil Olsen car @ OCFS. I'd be happy to help out.

mmpsportsmanrookie
Dirt Newbie

Total posts: 3
posted March 17, 2005 06:21 PM  
i am running a sportsman at fulton with the new spec crate motor.a correction on the lr spring it is a 200 not 220. any help would be greatly appreciated. right now i have a 175 on both the rf and rr and a 225 lf n 200lr.tires are hoosiers not sure if hards or softs yet

[This message has been edited by mmpsportsmanrookie (edited March 17, 2005).]

racerwilson
Dirt Freak

Total posts: 357
posted March 18, 2005 08:03 AM  
225-----175
/
200-----175

this is a good place to start for springs. I'd say about 1-1/2" - 2" stagger in front and 4-1/2" - 5-1/2" in rear. Start with about 65lbs left rear weight should be around 47%-48% cross weight on the scales. Chassis hight 5" LF 5-1/2" RF & LR 6" RR. What shocks are you using on the car?
Make shure you will have enough shock travel on all corrners. Hope this helps.

dbradley
Dirt Freak

Total posts: 251
posted March 18, 2005 08:33 AM  
Which crate motor is mandated....I know we run in the CVRA and the crate motor has been bullet proof in the late model division(GM crate).
D

mmpsportsmanrookie
Dirt Newbie

Total posts: 3
posted March 19, 2005 07:57 AM  
thanks racerwilson i'm sure this will help alot. getting help from my local speed shop but he never raced a coil over car so he not too sure about some things..running bilstein shocks. motor is a gm 602 crate.hope all goes well today attempting to put the motor in. had to have a motor mount fabricatedso i hope it works. just bought a used front end that i have to put in also. the one on the car was so old. wish i had the money for new but'u know how it goes.well time to go to store n get supplies beer n food. gottta keep the troops happy.

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