Hello, I have the same problem here.
My fastest PB is 1:16 something, and that was with that smooth race setup someone uploaded here. Then I tried out a setup that one guy sent me which I never used because it's kinda oversteery, and my best with that is 1:15.something. For a set that does 1:13's, that is a really bad time.
Obviously what's holding me back is my limited knowledge of setup tweaking (BTW what does parallel steer do?) and T1. I always feel that I'm too slow on the hairpin because if I put more throttle than I would normally do I end up backwards. And after turn 1 I'd spin if I changed directions too quickly (Would more toe-out at the front wheels lessen this?), so again I would be hesitant to apply more throttle, and so not carry enough speed down the straight. My first sector would always be at 25 seconds and I can see people do 23's. And the last thing holding me back is I'm using mouse.
Would like some help here. Should I post my PB?