I'm running F-C-R 5-7-4. I had 3 in the rear but it would diff out on me to much.

Before I switched to the csi black pistons I was running the serpent 8 hole conical pistons @ 1.3dia 42.5F 35R. I actually really liked that setup also. I'm at a bit of a different setup ATM. Csi black up front with 35w and 8 hole serpent conical with 30w rear. Camber @ 1° F and 2.5° R.

I run on a high to medium traction clay track running slicks. This setup is very fast & predictable.