I am think of buying a new engine for my T-Maxx 2.5 what would be a good performance engine for low end and speed

All I'm gonna say is, get a big block.
Not too sure on which engines are good. Haven't tested any. But I hear that the Sirio .18s are very powerfull motors, and they drop right into Maxxs.

Wait, why aren't you in the Maxx forum for this?

also the o.s. 18 is a great motor

umm.......you know this is a stadium truck forum? you will get more responses in traxxas monster truck forum