I think it is funny how if a few people run good with their chosen rear gear ratio, than anything else is bad info. I've seen videos of 6R80 Coyotes with all sorts of different gearing that run great
"4.10's"https://www.youtube.com/watch?v=SGWyeJUx-LM
"4.10's"https://www.youtube.com/watch?v=jfMt0YaeBaw
"4.30's"https://www.youtube.com/watch?v=STmlGMANS0Q
Just a few examples, but all pretty quick. I'd venture to guess that if all three changed nothing aside from 3.31, or 3.15 gears, you wouldn't see a tenth difference one way or the other. I'd say if you was on a stock converter or one that was too tight, lower gears would surely help. I'd rather have any gears with the right converter, over the "perfect" gears with the wrong converter any day of the week.
Sorry to bust your bubble but you don't have the on-track data to say one way or the other. It's funny that all the quick/fast auto Coyote's running 10's N/A are using a 3.31 or less. The last car in the video's linked...I spent time turning wrenches on and driving. It was quicker/faster with a 3.31. I was driving this pass which was the best it ever made:
...another car I tune: http://www.s197forum.com/forum/showpost.php?p=2362346&postcount=76
....we can keep adding more to the list but you get the point.
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