we run the sportaman/streetstock class 85 monte carlo stock sportsman on a well known track in the florida panhandle and we have 15% banks on rough track surface. received this car with 900rf 800lf 1 1/4 bar set at 1" rear springs are 175lr 150rr and car has pushed ever since we raised it up to legal ride height. 52% left side weight. best we can get with low car is 47.5 rear weight. added spring rubber in right front and driver was able to enter with more steering but car still pushes. Just got done doing all of the math for roll couple percent @ 86% front Overturning weight is 530 lbs. total roughly. don't know if this is enough info to get some tips. Just did the math on banking downforce corecction and found out that new wheel rate is 404 for rF FIGUrED IT OUT TO BE a 1200 lb. spring. any help would be awesome. Been off the track fr 2 months because of push and wasting sponsor money. not a guru but i have a few equations i've worked out in the past few weeks. please let me know if you have an equation or formula to get in the ball park with rear springs. haven't found anything on that subject or specific function. also wondering if 400 lb. wheel rate equals out to a 1200 lb. spring on this track. that is with banking down force added.  

I can't answer alot of your questions, but I can answer a few.

Your wheel rate has nothing to do with the track angle, you calculate it using the motion ratio of your control arm.   ie, Wr=Sr*(MotionRatio)^2.  Motion ratio is the distance from the inner pivot to the spring (Ds) divided by the distance from the inner pivot to the ball joint (Dbj) or Ds/Dbj.  Sr is the nominal spring rate of your spring.

Also keep in mind, your sway bar will add to the wheel rate.

Also, unless your front springs are so soft as to put you on the bumpstops, more front spring is going to make the car tighter. i think your equations must be neglecting the sway bar, which is why they suggest a stiffer spring than you have, even though you're already tight.

Is your rear suspension stock?  Its always been my impression that metric rear suspensions did better with more split, due to the high roll centers.

What equations are you using?  

I need to know more info on your car. I run same type of car in New England as you and constantly have people with same issues. Without knowing all details I will try to give a basic starting point. I would go to a 1400 lbs RF 1200 LF 250 LR and 185RR. Also any ballast near the LR I would relocate to the LF or as close as possible. For percentages 50% cross weight will work good with a low rear weight percent. Also an 1 1/4 bar with 1/16 play is good too. If your driver likes to drive in deep and can drive with both feet (gas/brake) this setup will allow  him to run top or bottom. Also what gear are you running and what are your motor rules?? And what type of rear suspension ;I know a four link but are the rear links relocated??? I can be emailed at brilyn31@yahoo.com I have lots of experience with these types of cars and lots of success.Contact me anytime!!!  

bspike, that ain't gonna work here.(good idea though) Our track too abrasive for hoosier 790's to start with.
pcola95, If you can't get Jim, Email me southpawracing@cox.net