Pinion size for lunchbox/pumpkin

[whale22]

Hi all-

I'm running a Pumpkin with a hobbywing quicrun ESC with a HPI 15T thunderbolt with the standard pinion and spacer. I have grabbed a motor mount that would let me use a standard length pinion. Is there a pinion that would perform better (more speed) with my current setup? Thanks!

[kontemax]

Bigger the pinion faster the car but keep in mind, bigger the pinion hotter the motor and the esc.

With a bigger pinion you will lose acceleration and torque. Your car will move slower and will need more time to gain the highest speed.

Now you have a 10 teeth pinion gear, I would not move more to 11 teeth or 12 teeth at maximum.

Max

[GregM]

I agree 100% with what kontemax says.

On the Lunchbox, there are two pinion options: 10T with mount plate, 18T without the plate (Hornet configuration).

I would stick with the 10T pinion to retain the wheely function, even more with a low turn (high RPM) brushed motor.