[Gunter]

I no this isn't helping much but I can't work out from ur posts what car you hav, is it a mi4lp?
Next thing is in TC gearing is done in final drive ratio so my pinion size wouldn't be the same as on your car so u need to find a gear ratio chart for ur car.
Next is gearing depends if u running boosted or blinky 13.5?

And Dave 28's do come of quite hot but if you use additive it seems to not effect the performance to much I've noticed, they are noticeably faster tho so all hav to run them to be within a chance of winning