The final gear
I get 214 with full Down force on the long straight on the ring.
do not touch the individual gears, only play with the final gear.
1st race it normaly by trying to get to red line by the end of the race ie on the back stretch where the finish line is. I had a max of 219MPh
2nd move the final gear only, to widen the gears then race agian you will notice that the car will go a little faster, this is how I figured out the power band on the Oreca is not around the redline.
keep doing that until your car cannot go any faster.
EG I do around 190 in 5th gear, when it switches over to 6th it accelerates like a mofo, you should come out of the 1st turn at 212-214 mph, it's sounds wierd since your at low RPM making you think you are not going that fast but DAM breaking 230 is sweet!!!
I am at work and I will post my gearing later