[bdebde]

I run a 1515 2.5D on 6s in my Muggy (check my sig for build thread). I would have got the 1521 1Y had it been in stock, but I am very happy with the motor I have (plenty of power). I think Satttheman has a 1521 1Y in his Muggy. I have a couple vids in my build thread and so does he (search "Muggy" or by username).

Pick the 1521 1Y, you can gear up for plenty of speed. The 1521 1D and 1.5D would just be some serious amp hogs IMO.

You won't need serious rpm unless you only do speed runs and only for short periods. I have a Plett Big Maxx that I have run in the Muggy a few times, it is 2300kv and rated 1800 watts (same as the 1521). It will really heat up my MGM 16024 esc and battery if I run for too long, and the power just flips the truck over with ease (not my favorite way to drive). With my 1515 2.5D, I can run pack after pack all day without overheating things.