Brushless e-maxx - new setup questions

[ozdave]

ok cool, XL heatsink it is.

So back to using your tool again and I drop down to a 16t pinion and its predicting a top speed of 35mph. Good, but not quite the 40mph i was hoping for to compete with the nitro guys I run with.

I have to go to 16 cells to hit 40 with this gearing. I was hoping to do it with 14 if possible but have the option to go to 16 for a bit of fun. Now if I change the motor to a 7xl i can hit 40 with 14 cells but can't run 16 cells as it spins over 40,000 rpm and im getting into the danger of overheating.

Can I drop the spur tooth count safely to up my speed ? If i go down to 44T spur im back in the right range. Does one exist that I can stick onto the strobe slipper? or am i just relocating the problem of a the 18t pinion?

Or should i be considering a different motor to achieve these goals ?