I think everyone is going nuts with these motors. I ordered a couple 1717s, 1520s and a 1518 and I'm not sure what to do with them yet or even if they fit in anything I have. I'm thinking we have this all wrong. Wouldnt a 1512 on 6S be more than plenty enough for these trucks? I guess thats no fun.
I've got a couple of 3905 emaxxes and it looks like the 1518 and 1520 should fit. I dont know about the 1717 yet though.
I did a search and over at the traxxas forum some guy is running a 1717 on his erevo and he just barely made it fit.
http://monster.traxxas.com/showthread.php?p=4602445