Anyone ran both a 1512 & 1515 in Revo?

[zeropointbug]

Yeah, like I was keeping ahead of a big block Revo today at a bashing meet, but I just want more high speed torque, for lifting that front end of course. I noticed too that the 1512 is pretty snappy, compared to a 7XL, which has a bigger heavier rotor which affects it of course.

The way it is right now, with a 7s2p A123 pack on it, 15/38 gearing (42mph) is the limit for keeping the temps at a nice level. I would like to gear it up some more , and have more torque, so the 1515 should do this just right.

Unless, has anyone ever ran 8s A123 on the MMM? I know 7s A123 should be no prob, as it's same as 6s lipo. Any thoughts? Cuz then I might be able to get some more rpm's from the motor and maybe that will do it? They can handle high rpm's I know that.