R.R. TRACTION LOSE

I have a metric chassis asphalt street stock with about 3272 total lbs. (just over the min. required here),  distributed at 55% front and 55% left along with 53% wedge. The spring rates  are at 1000 L.F., 1100 R.F., 325 L.R., 275 R.R. The corners scale check in about, 932 L.F., 872 R.F., 876 L.R., and 592 R.R. The front geometry is good as the car steers fantastic. With 1/2" to 1" stagger on a locked rear (same as others on track) it wants to break loose in the middle of the turn on a high bank,half mile.  The R.R. is getting smoked. We seem to be the same as the others with the weight % left side and close on the front to rear split but not sure on the corners. Are we light on the R.R.? Maybe need to back off the wedge?  What do you think ?  THANKS for any advice you have to offer !  

Not knowing any other details. I would look at reducing spring rates. With that much spring rate in the rear on a metric chassis your roll angle in the rear would be very low, meaning you are forcing the right rear in the track. Which could actually be unloading lr and overloading rr. Just something to think about. Good luck.  

As a general rule of thumb, when the geometry settings are correct and the chassis is balanced on the front and rear roll angles, your crossweight should be about 3% higher than your rear percentage. Since you have 45% rear weight percentage, you should start out at 48% crossweight and make small adjustments from there to losen or tighten the car. A set of tires on the same axle have the most grip when the load is distributed evenly across them, so by lowering the crossweight, you will have more evenly loaded rear tires, which gives more traction.  If you make this change and the car is still loose in the center, then you may also want to lower the rear spring rates to get more rear roll angle like the last guy said.  

I was some-what going in that direction in my thinking. As I am a rookie racer trying on the lowest of budgets, and no engineering degree, I must learn from the
(garage)floor up. My hope was to get some second oppinions, and your suggestions seem to hit the nail on the head. Much thanks to ALL !  

I agree with Mdew99 on this and also would suggest decreasing the split on the rear springs. On a high bank you could usually get away with a bigger split but the metric seems to not like it. Your very light On the RR and that seems to point to all this.  
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