optimum Neu for revo 6s

[Patrick]

If you're going to do most of your running on 4 and 5s and 6s only for speed runs I'd probably get a 1515 1y (2200kv) or 1515 2d (2050kv). No higher kv than the 1515 1.5d (2700kv).
If you wanted to do 40-50mph normal use on 6s, the 1515 2.5d (1650kv) works well for me.