T4 with GM-Racing BL Motor

[skellyo]

I recently purchased a FT T4 used on a forum to start racing with. Well, to make a long story short, I wanted a motor other than a Mamba Max or Feigao to use in it. I found a good deal on a GM-Racing 7.5T that I figured I would try. The motor is sensored, but is said to work well on sensored or sensorless ESC's, but I was still skeptical. To cut to the chase, here's my results with it:

Vehicle: FT T4 with Pro-Line Edge Front, Hole Shot Rears
Gearing: 19:87
Battery: Trakpower 4900mAH Lipo
ESC: Mamba Max
Motor: GM-Racing 7.5T https://shop.graupner.de/webuerp/servlet/AI?ARTN=97233
Motor Spec Chart:


I ran the truck in a field with really low grass (similar grass to a golf course fairway) and also on the infield of a baseball diamond that was dirt and grass. I ran it for almost 40 minutes and the temps never got to more then 134F on the motor and 121F on the ESC. Top speed with a fresh pack (verified by GPS) was 31.2mph. I was very happy with this setup as it ran pretty cool considering the temp that day was 88F. The runtime was excellent and the speed wasn't bad either, especially since it's really geared for off-road racing versus bashing. With the temps I saw, I have no doubt I could jump up 4-6mph with a gearing change and still be well within what I consider a safe operating temperature range. Also, cogging was a non-issue as I could nail the throttle and it would just take off.

FWIW, these GM-Racing motors are supposedly the same motors as the Team Orion Vortex and Peak Racing Vantage. I also have a GM-Racing 5.5T that I will be testing out soon in another T4. As another tidbit, these motors have a fan built onto the rotor and make a weird whirring sound when you're driving. It sounds like something in your drivetrain might be buggered up, but it's just the way it sounds with the fan on the rotor.

I just thought I'd toss out this info in case someone wants to look into a motor other than a MM or Feigao.