Would a Neu 1512 work good in a new 3905 e-maxx?
 

Would a Neu 1512 work good in a new 3905 e-maxx not run too hot etc,be enough power?...

more than enough power.
I run 1512/2.5D 2000kv on 5S lipo in my quite heavy maxx. motor stays cool and it will flip anytime if i am not careful with throttle.

How do you have that maxx geared Wallot? I've always liked the 1512 as a cheaper option to the 1515, yet its still much more powerful than a HvMaxx is.

What voltage will you be using?

An MGM esc with a Neu motor of around 1800-2000kv should work.

I have hybrid bulkheads with 43/13 diffs, 2nd speed maxx tranny and 51/16 gearing (strobe) for general bashing and 51/18 for higher speed runs.

Motor pulls ~1900Watts on aceleration from standstill

truck needs just few feet and small jump to do a backflip :)
video - http://www.radeks.net/?p=74