Upgrade to a Lehner... Which One?

[jhautz]

So gearing up a 1950-8 will not cause excessive esc heat? The whole reason I want to upgrade is to avoid heat. I feel like Im constantly walking the line of to much heat in either the motor or esc.

On 5s (18.5v) the 1950-8 will only be spinning at around 30k rpm. The 1950-7 will be at about 35K rpm. Will I have a problem with the 1950-8 not hitting its sweetspot ''powerband'' at only 30K rpm?

Which of the 2 would be better for nice cool running and 40-45 mph but still have nice punch? Any sugested gearing for the 2 motors for 40-45 top end on 5s? I'm running a Gmaxx revo with an emaxx tranny and revo diffs and a Quark 125.

My calculations say that it would need to be arond 51/18-20 on the 1950-7, and 51/20-22 on the 1950-8 to reach 40-45mph on 5s. Does this sound reasonable?