will 100Amp's be enough ?
 

Hi !

Would a 100A 12s turnigy esc be enough in a mcd 1/5 scale 4wd mt ? geared for 35-40mph on 12s ?

sounds fine to me. just remember that you will still need mechanical brakes.

worst case scenario, you might have to add a fan to the esc if you want to gear higher. i have seen this esc used before in 1/5 without any problems.

100A x 12 x 3.7V = 4440Watts
This should be enough to move it around. What motor are you going to use?

I thik it will be an turnigy 170kv outrunner in 80cc size :)

This one?

TR 80-85-B 170Kv Brushless Outrunner

yes :)