What do you think is the best 4th Final Gear Ratio for 70 clear in draft of course. I know you are at a 3.688 but that seems bit short for the draft. I ran 3.611 with the AI for 20 laps and it seemed pretty good but my temps got down to 205 for both water and oil so I'm thinking I might be able to go to a 629 or so. I know I will want the extra gear for laps 40 - 60 but you mostly certainly want to over do it. Has anyone tested long runs in draft?