I know you had too in the erevo 1/16... same for this? I didnt put it cuz it seemed bigger? Do i put the pinion that it comes with in? or leave it stock while running 3s?
I would switch it out.
If the "optional" pinion is bigger I would be hesitant to use it running 3s. That being said when it comes to gearing, motor and ESC temps should always be your guide.
Rusty - MERV - Pede 4x4-Alias
SPC Lipo Power
I've done this. The motor gets hotter but it goes even faster. I think its ridiculously fast with 3s and the stock pinion. IMO, its for the wow factor and showing off. My street is too narrow for big mistakes and I don't like smacking the curb hard.
The bigger pinion is for speed runs only, with appropriate cool down periods between them. Bigger pinion = faster but hotter.
What SHOULD the motor and esc temps be? If you keep the temp below the reccomended levels, what is the role of a heatsink and fan?
if you push your vehicle to its limits, you will not keep it below the temps
the role of the heatsink and fan is to allow you to push it, and keep it cooler than without
I found that even on 2S with a smaller than stock pinion the car would get excessively hot (motor in particular) after 2 lipo packs. So I put on a motor heatsink with a fan and that helped in a big way with the motor. But then the ESC was getting hot. Adding some venting to the body and getting some airflow under there will help big time also. If you just put a heat sink on the motor with no fan and no holes in the body the heat sink will simply heat up and do nothing. Airflow is key... a few small openings in the front and back will go a long way.