Hardest race to date was the RX7 seasonal challenge. Nearly lost a layer of skin on my left thumb trying to muscle the beast around.

Goal is to complete every lap faster than 1:01:xx
That is basically 3 seconds shaved off the R34's time. Midway through the last lap you would have caught up with the R34 because it will be slowed down tremendously by a 300zx.

I used this setup:
Downforce: 0/22
Differential
Initial: xx/7
Accel: xx/25
Braking: xx/5

Ride Height: 0/0
Spring Rate: 10.0/4.8
Extension: 9/5
Compression: 7/3
Anti-Roll: 1/7
Camber: 1.9/3.3
Toe: 0.15/-0.30

Brake Balance: 8/7

Transmission: MT
ABS: 1
Everything else: OFF

Most would just turn of all driving aids, EXCEPT ABS.
I don't know anyone who has successfully completed a lap (with competitive time) without ABS. I'm sure there are gifted ones out there that can pull it off.