[Joe Ford]

A few reasons...one the 2650 is comparable to a 1512 series motor, not 1515 (that's the 2200). Being shorter, it can't handle the wattage that a 1515 can, and will have a tendency to overheat in 6s car applications...which we won't warranty. Second, those charts were made for the airplane guys originally...airplanes don't put the same strain on a motor that a car application does and they generally get much better airflow than an rc car/truck does....again, higher tendency to overheat if you don't know what you're doing. And lastly, but probably the most important (should have listed it first ;) ) is that at anything above 22.64v under load your motor is above the 60,000rpm limit...we want to minimize the risk of problems for our customers. In airplanes we RARELY need 60,000 motor rpms to get great performance...it is much easier to damage a motor from RPM in a car than a plane IMO. Only had one magnet fly apart in a plane (and it was my fault...ran my motor too fast in my pylon plane...but that's the point...all out speed)...can't tell you how many I've split in car applications, and on some of them I wasn't even trying to go fast. Demag the motor much easier in cars, and when that happens they speed up more and more til they come apart.