I take it you mean 50/50 side to side or corner to corner but not front to rear Of course if you could make it front to rear that would be incredible but it would take some serious surgery on a FWD car to do that. I take it the Z214, C51 compound, are known to work best with a lot of camber, perhaps the sidewalls are a bit softer and with superb grip that deems more camber is better for them. -4 is pretty extreme, in the realm of losing traction and braking effectiveness but if it works for you then great Have you tried the A6 or V710? They can work great for lapping, TT events superbly so, they hold up pretty well if not over driven on track for extended periods as well. I have some R6 tires in 225/45/15, 8.8" tread width, my set is barely used but old now so mostly using them to get the fenders pulled just right, I might give them a run on track but they might not ever warm up to get some good grip out of them. I have been debating running the Rival in that size, 8.5" tread width as I can run them on the street if I do not feel like swapping for an event, etc...When I run some TT events later on I will probably run the A6 though, no warm up needed. Since I have a great connection on fresh take offs from race teams for great prices I buy used tires and get the best of them which sometimes means not raced at all, just scuffed.