Fastest Motor on 6s?

[Kevlar]

So after a little break from R/C to build a supercharged Mustang, I am back in the game and building another Revo....but I want to build it just for speed runs, seeing if I can top 90mph soooo.....what is the best/fastest motor to do this on 6s? From some of the reading I've been doing, it looks like a 1512 1.5d is about right, but I am open to anything.

Thanks in advance!