i am trying to get more out my car i have 3s lipo and 23t 48p want more speed
if you want more speed, install a bigger pinion, but your electronics will run hot,
Diff fluid will not increase or decrease top speed.
It will, however, change the amount of time it takes to get there.
There is some power loss due to friction caused by high viscosity fluids, so you may loose a few MPH at top end.
Whatever it is I just typed... could be wrong.
its actually 55p not 48p