It runs like a champ on 6S. Consistently radar's over 60mph....best so far with a XL motor on this truck has been 67.7. Can't seem to pass that mark though. Any more gear and the truck slows down...less gear and the truck doesn't make it to that mark, so its time to change to something that will pull more gear. I am hoping this 1950/6 does the trick.
I use a 1950 8t hi amp on 4s in my jammin buggy. I run a 18/46 gear , it will hang with my friends buggy & he runs a NEU 1512-1.5d on 4s & he runs a 10/46 gear.