RPM and rollout question/decision help?

[nuz69]

IMO you are wrong,
The torque per amp is higher when the kV is lower, meaning for the same acceleration force, both motor will consume exactly same current. Its all about energy, you need it to accelerate your truck, and it comes from your battery depend only of voltage and current ==> same voltage and acceleration ==> same current.

Neu 1512 1.5 : 10.23 oz
Castle/neu 1512 1Y : 13.1 oz

It appears that the Castle/neu has a little less efficiency than the real american neu.

The electromagnetic efficiency depends a lot of the load, not of the RPM : between 25k and 40k efficiency is the same. But mechnical losses are higher at 40k.
==> For the same top speed and same voltage, the 1850kV will always provide better results for in matter of temps and runtimes...
==> I would keep the neu.
Who is jeff ? ^^
Can someone qualified confirm or negate ?