Just finished my second Autocross.

For my first autocross, I had a full tank in the car, and did not have any problems with handling.

Second Autocross, had half a tank and the back end was quite loose. On my final run, actually lost control and went into a sideways skid after rotating 180 degrees.

I have eibach springs, with a 21 mm rear SCA sway bar. Tire pressure during the incident was 43 psi front, 38 psi rear. I run Bridgestone RE730 225/45 - 17 tires.

Any suggestions would be appreciated.

Thanks!