Wissota Street Stock
I'm currently in the process of getting a WISSOTA Street Stock ready for competition. This will be my first year driving these cars but I have been around them for more than five years now and have helped win three track championships.
I'm always looking for a step ahead and like to try different things and have been looking for a different setup than we've been running. I came across the Feb. '09 article "Fine Tuning a Hobby Stock" and am very surprised at the spring rates being used. They are far lighter than we have been using. My question is what kind of numbers did you see on the scales?
The springs we use are LF 950, RF 1,100, LR 325, and RR 200. We usually run 250 pounds heavy on LR and about 52 percent rear and 53 percent cross. Is that wrong? We've been noticing that if you get the car too tight the motor won't turn any rpms. Do you want it heavy on LR, or more balance across rear?
The front spring rate stiffness is all dependent on the type of track you'll be running. A heavy track with ruts will require much heavier front spring rates. But that's not the primary concern for your setup.
The rear spring rates and the spring splits are very important. The spring split you show, 125 pounds, is, in my opinion, high. This would make the car tight and won't allow it to turn well. A car that doesn't turn will bog down in the turns and not come off the corners well. You could probably get by with a 250 or 275 LR spring rate.
If the "250 pounds heavy on the LR" means weight, you're in the high range for crossweight. The car will have a tendency to drive off the LR and that could make it tight also. You would need to drop down to less than 50 percent cross to go to the lower range of crossweight.
Run the car and see how it works. If you find you need to throw it into the turns to get it to turn, you'll need to loosen it up. Think about what I said above and make changes to free the car up. The high rear spring split works against the balanced setup we always refer to.