This will be my first year racing. I bought a 1986 Buick Regal Street Stock. The car was setup for Asphalt. Looking what I should run for this car on dirt. No weight jacks or spacers allowed. Springs have to be stock mounting with no change to spring cups etc. I have new springs for the front. 1250 RF, 1000 LF. Both springs are 12". How are these for starting with? What should I put in the rear? I am not running a sway bar on the front or rear. Just trying to get a ball park so I can get the car out on the track to test. I was thinking of going with 200 LR, 175 RR. What do you recommend. What spring height? I have not purchased these yet. Track is a 1/4-1/2 mile low bank. Track is Dry Slick most nights. Especially in the mains. We are required to run 10" Slicks. I have 6 New Hoosiers 3 10.0/26.5-15 1080 for the inside and 3 10.0/27.0-15 1080 for the outside. What tire pressures do you recommend we start with. Any help is appreciated. Thanks Chris
I run a metric car on dirt in the midwest and we run a 1200 lb. spring in the right front, a 1000 lb. spring in the left front, our front springs are only 9" tall though. For the rear of the car we run a 225 or we put a 200 in the left rear and a 175 in the right rear. We run 13" springs in the rear of the car. Our tire pressures vary but we start at 20 in the right front, 16 in the left front, 14 in the left rear, 16 in the right rear.
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I agree with JeWiggins with the spring rates, good baseline rates. I run a metric dirt car in Pa. My baseline a.p.'s are (12-LF) (16-RF) (9-LR) (14-RR) on a 3200lb. car, 5/8 mile with mild banking.
Do a search for wide metric secrets on the web. You will find some tricks!