well i ran the 2s lipo(8000) in my old st geared 21/87 and it didn't get too warm now I did run the mm 7700 that i used to own on my slash with a 8 cell pack and it got way too hot batts were 160 range and would only run about 5 minutes...according to the gearing chart I had a 70mph estimated ratio(this was running stock gear ratio)
but i think i am gonna run the mamba max esc and try one of the hobby wing motors:
http://www.hobbycity.com/hobbycity/s...idProduct=7195 for $41 bucks and run a 2s/ 3s setup and see how it goes