just upgraded my slash 2wd brushed to the turn igy ********* 8.5t from HK;
Can Size: 540
Sensored: Yes (Standard 6 pin harness)
Max voltage: 7.4~11.1V (2~3S)
Max Current: 33A
Max Watts: 365w
No Load Current: 5.8A
Shaft Size: 3.175mm
Can Diameter: 36mm
Can Length: 51.5mm
and this ********* ESC on a 3s lipo
Cont. Current: 100A
Burst Current: 200A
Car Size: 1/10th
Battery: 2-3 Cell Lipo
L-BEC: 5.0V / 2A Output
Motor Type: Sensored or Sensorless Brushless
Size: 40.5 x 37.5 x 24mm
Battery Plug: Required
On/Off Switch: Yes
Thermal Overload Protection: Yes
Battery Terminals: 12AWG size
Motor Terminals: 12AWG size
Problem is that it's running pretyy hot with the stock gearing (19t pinion 90t spur). I went down 1 tooth on de pinion (18t) and it seems to get even hotter (could be me, don't have a temp gun).
I have now ordered a 16t pinion and a 92t spur which will hopefully make things better. But will it? I noticed that in some cases a larger pinion (let's say 20t) made the motor and esc cooler. I guess this would have to do with less rpm's? Then again it will also increase the load on the motor so I think I'm not understanding it fully.
I was running it (as a test) on the street and on some gravel but it should work offroad (there's a small track close to my house). After 10 minutes or so the thermal protection kicks in (which kind of s*cks as it also cuts power to the steering servo, not very nice when this happes while going pretty fast).
Anybody willing to shine a light on this? Am I turning into the wrong direction?
Last edited by Insane; 07-27-2012 at 05:11 AM.
The motor would be a lot cooler if you ran it on 2s lipo. 3s is fast and powerful, but also adds a lot of heat.
Regardless, you need to add an aluminum transmission case to help keep your temps down. At the very least, a heatsink on the motor will help. The motor looks pretty good on paper but I think the 3s is too much for it without gearing down and adding aluminum to cool.
My Black & Blue Rally is faster than your color...
A temp gun is a must to know how hot is too hot. I had the same feeling with a setup I was running, borrowed a good temp gun from an auto tech and learned that 135-165 can feel pretty darn hot. That temp gun will help a lot with gearing and also make you feel comfortable you are not about to harm your suped up motor!
20 tooth pinion 90 tooth spur. Use a 2 cell with high discharge rate like 35 c , something descent. You'll do good on the track. I use my 3 cell battery only to do speedd runs once in a great while , and to not damage it just being kept stored. I don't use my 3 cell on the track because every time i do , i break something , or strip my wheel hexes'.
Traxxas Slash 2wd and Thunder Tiger Tomahawk Vx