RC10T pinion advice

[highflier]

Sorry for post after post.... I am adding to this as I learn more.

I currently have 87 spur and a 14 pinion on it. Using the rc calculator, I am way undergeared and over volts for the motor...

It says the lehner is only good to 40,000 RPM's and I am driving voltage to 50,000 RPM's
However I think that is the unloaded KV and I am assuming that 4200KV is the loaded value which puts me right on the edge. of 42000 RMPS

Using the 14 tooth it says max speed of 32 MPH, I have a 16 tooth I can put on that would get me to 38 MPH. I am thinking I should be gearing for about 45 MPH which would be a 19 tooth Pinion.

So will increasing the Pinion up to 19 tooth actually lower motor temp, This goes against my natural instinct.

Highflier