T-maxx Converted

[DustyfX4]

Ok like the title says i converted my T-maxx extended chassis to electric, i am running the Toro SC120 esc (which is awesome) and an Orion 3750kv brushless motor, (which is the quesiton) after about 5 mins of running on my 2s lipo the motor is pretty warm havent taken a temp but prob close to 180 or 200! like i said pretty warm. I was wondering how to get away from this, should i go to a lower kv motor or what? Any Input will be greatly appreciated!

Thanks

[M1tch]

Is the esc temperature ok?. Try a bigger pinion if you can.

[DustyfX4]

Yes the esc temps are great, really cool to the touch, love this esc for the money! so you think a bigger pinion will kepe the motor heat down! Just makin sure thats what you meant because when i used to run crawlers with brushed motors the bigger the pinion the hotter the motor would run! I will try a larger pinion if i can find one(i think im running a 24t 32p pinion) thanks

[dkf]

A bigger pinion will just make the motor hotter. You wan to go smaller vs bigger. If you are running a 24t drop down to around an 18t just to see if the motor temps drop, which they probably will.

[DustyfX4]

Thats what i was thinking! Going smaller will also down my speed right! I like the speed it has now and the bottom end torque is great. Do you think maybe running a longer can motor with a lower kv would help or would i want to run a higher kv?

[rangercat23]

Originally Posted by dkf

A bigger pinion will just make the motor hotter. You wan to go smaller vs bigger. If you are running a 24t drop down to around an 18t just to see if the motor temps drop, which they probably will.

X2

[dkf]

The T-maxx is a decent sized heavy truck so a lower KV would be better. Something designed for an 1/8 scale. I am no brushless expert but if I wanted speed and torque I would be looking at a 1/8 scale under 3000 kv motor and run it on at least 3s. Gear down, volt up.

[DustyfX4]

well im gonna try that, and ill prob be running 4s when i get a new motor! got my new lipos on order now! hopefully find a motor to stick on this thing soon!

[dkf]

Found this.

SKYRC TORO SC120 120A ESC & 4600KV Brushless Motor for 1/10 Car with Program Card
Specifications:
- Model: TORO S3663 4 Poles KV4600 Brushless Motor
- Rotational Speed: 4600 KV
- Motor Dimensions (Diameter x Length): 36mm x 63.4mm
- Shaft Dimensions (Diameter x Length): 5mm x 15mm
- Input Battery Types: NiCd/ Nimh/ Li-po Battery
- Recommend Model: RC Model Car
- ESC Specifications
- Model: SC120
- Dimensions (Length x Width x Height): 55 x 37.6 x 38.4mm (2.17 x 1.47 x 1.5in.)
- Continuous / Burst Current: 120Amp / 760Amp
- BEC Output: 6V 5Amp
- Resistance: 0.0004Ohms
- Controls: Rev/Brk or Fwd/Fwd
- Status LED: 1 with 3 color (Red, Green & Orange)
- Thermal Overload Protection: Yes
- Weight (without wires) 87g (3.07oz)
Motor Limits:
- Brushless KV<=6000: Up to 2S (8.4Volt), idel for 1/10 short course
- Brushless KV<=4000: Up to 3S (12.6Volt), for 1/10 buggies and short course
- Brushless KV<=3000: Up to 4S (16.8Volt), idel for 1/8 buggies

With a <3000 kv motor on 4s that truck should be stupid fast. Invest in a wheelie bar.

[maxxa87]

I'm running 4s and a Dewalt 14v motor on my converted 3.3 T-maxx. Speed isn't like a brushless E-maxx or anything but the torque is ridiculous.

[DustyfX4]

Thanks alot dkf! Ill try and find a motor here soon and get some video up! might try it as an Foff! Not sure but we will see! Thanks alot everyone for the help!