FR Settings for Silvia Spec R & RX7

I've been playing around with the suspension and alignment settings for both these cars and I have got them almost where I want them. Both cars seem very sensitive to toe settings, both have +1.0 front and -1.0 rear toe settings, -3.0 front camber and -1.5 rear camber.

The car turns in fine, then understeers when I get on the throttle. When I get off the throttle the car takes a set again, then when I get back on the gas, the cars get neutral and are fine. Any ideas? Maybe my driving techniqe is wrong. Anyway, any suggestions would be helpful.