which feigao?

[riverat1540]

i have a brushless evader with a max amps 8000hv 3s lipo and im running a mamba max esc with a feigao 380 6l but was wondering if i could use the 540 9l for more speed. i know it would take longer to spool up but with it having more torque if i used higher gearing would it be better in that way. right now im hitting about 55mph and running a 26 pinion with 88 spur. i can go as low as 86 on the spur size but where im at now seems to run at a good temp but the motor can really get hot when u get on it. any opinions appreaciated.