ReVtech 17.5 Motor help PLEASE!
#1
ReVtech 17.5 Motor help PLEASE!
Hello,
Just bought a revtech 17.5 motor on here and finally had a chance to try it out. Im running it in my Sc10 with tekin rs pro in blinky mode. I started at 30/78 with 2 clicks over on the motor timing, and after 6-8 min the motor got to about 160 degrees. That wasn't right so I went down 2 teeth on the pinion and still the same result after letting the motor cool off completely.
What could be the problem with this premature heating? Anyone have any gearing suggestions? Am I over gearing? I used to run 28/78 on my D3 17.5 and it was fine with no problems. Is something wrong with the motor itself? Thanks
Just bought a revtech 17.5 motor on here and finally had a chance to try it out. Im running it in my Sc10 with tekin rs pro in blinky mode. I started at 30/78 with 2 clicks over on the motor timing, and after 6-8 min the motor got to about 160 degrees. That wasn't right so I went down 2 teeth on the pinion and still the same result after letting the motor cool off completely.
What could be the problem with this premature heating? Anyone have any gearing suggestions? Am I over gearing? I used to run 28/78 on my D3 17.5 and it was fine with no problems. Is something wrong with the motor itself? Thanks
#2
Hello,
Just bought a revtech 17.5 motor on here and finally had a chance to try it out. Im running it in my Sc10 with tekin rs pro in blinky mode. I started at 30/78 with 2 clicks over on the motor timing, and after 6-8 min the motor got to about 160 degrees. That wasn't right so I went down 2 teeth on the pinion and still the same result after letting the motor cool off completely.
What could be the problem with this premature heating? Anyone have any gearing suggestions? Am I over gearing? I used to run 28/78 on my D3 17.5 and it was fine with no problems. Is something wrong with the motor itself? Thanks
Just bought a revtech 17.5 motor on here and finally had a chance to try it out. Im running it in my Sc10 with tekin rs pro in blinky mode. I started at 30/78 with 2 clicks over on the motor timing, and after 6-8 min the motor got to about 160 degrees. That wasn't right so I went down 2 teeth on the pinion and still the same result after letting the motor cool off completely.
What could be the problem with this premature heating? Anyone have any gearing suggestions? Am I over gearing? I used to run 28/78 on my D3 17.5 and it was fine with no problems. Is something wrong with the motor itself? Thanks
#3
Based on what I have run my Revtech at, you're significantly under-geared. My motor does have the HT rotor, but I run a 72 spur with pinions in the 27-29 range. The HT rotor seems to be good for 2-3 more teeth on your pinion over the standard rotor, so if yours is standard adjust your gearing accordingly. I haven't found it to be worthwhile adding endbell timing at all in an SC10 with this motor- just builds heat IMO.
#4
Tech Regular
iTrader: (12)
I would put timing back to zero and start your gearing at 28/78. Then check the temps get the gearing right for your track before you add timing then add a little timing and keep checking temps. Also make sure bearings are good in motor and everythin is good with your tranny.
#5
So i took my spur assembly apart and found that I was actually using a 75T, not a 78T. So I was in the same range as you. Is this a motor problem itself then?
#6
What's your track surface? How much does your slipper slip? Is your driving style smooth or aggressive? In stock class these are all important factors. I gear my motors to run around 150 after a 6 min race- running 8 min can lead to excessive heat. There's also a big temp difference- 15-20 degrees - between driving smooth or aggressive. Drop down to 26/75 and do a timed run that is as long as you race for. (Even better if you can check every two mins) If still hot, go down a tooth. If not, go up a tooth and re-check. It's very important to establish a baseline gearing for your truck/track to work off of.
#7
What's your track surface? How much does your slipper slip? Is your driving style smooth or aggressive? In stock class these are all important factors. I gear my motors to run around 150 after a 6 min race- running 8 min can lead to excessive heat. There's also a big temp difference- 15-20 degrees - between driving smooth or aggressive. Drop down to 26/75 and do a timed run that is as long as you race for. (Even better if you can check every two mins) If still hot, go down a tooth. If not, go up a tooth and re-check. It's very important to establish a baseline gearing for your truck/track to work off of.
#9
Are these motors prone to heating up that high that quick?
#11
I think you are over geared. I run the d3 17.5 in my Kyosho with a 78-24 pinion with no timing on can and almost nothing for boost. After a 10 minute main I'm at 116 in a 86 degree day. I don't even get to max it out down the straight at all so I may even take the little boost it has or gear down more.
What's esc do you have? My friend kept thermaling his in 5 minutes and his esc was not getting enough air flow and had drag brake, etc etc. don't forget to check you motor bearings often. Since my x-12 motor is open slotted they would get dirty raising the temps by almost 20 degrees
What's esc do you have? My friend kept thermaling his in 5 minutes and his esc was not getting enough air flow and had drag brake, etc etc. don't forget to check you motor bearings often. Since my x-12 motor is open slotted they would get dirty raising the temps by almost 20 degrees
#12
Mine d3 does not but then I bought it new. The used lrp motor I got from here used had really gritty bearings and my temps were higher than my liking. When buying used always tear it down and clean everything, better safe than sorry. After clean motor and beari gs my temps have dropped 10+- degrees