Gearing question

[Scx10usmc]

So I'm using holmeshobbies new waterproof brushless esc, paired to their BL pro 3100kv trail master brushless motor. I'm running a 32 pitch, 56tooth spur, with a 12 tooth pinion. The esc, motor are getting really hot within 5 minutes of running. The battery I'm using is a 2250 3s 65C lipo. And even the battery gets kinda warm. Now this is the first time this has happened. I used to run a 88 tooth 48 pitch spur with a 14 tooth pinion and never had this issue. Only that holmeshobbies motor ate 48 pitch gears for lunch. That's why I switched to 32 pitch. There is nothing causing resistance on the motor. Any info would be greatly appreciated. Also I don't know if this would cause anything, but I filled my receiver up with dielectric grease to keep from corroding, could that be causing everything to over heat??? Thanks guys!

 

[Eric0424]

You're over-geared. You need a 9 tooth pinion with your 56 spur to get the ratio close (6.22:1) to what it was with the 88/14 (6.28:1). Right now you're at 4.00:1 on your spur/pinion ratio.

 

[Scx10usmc]

You need a 9 tooth pinion with your 56 spur to get the ratio close (6.22:1) to what it was with the 88/14 (6.28:1). Right now you're at 4.00:1 on your spur/pinion ratio.

Ok. Is that a good ratio to be at?

 

[Eric0424]

If it was running cool at 6.28:1, then it was fine. You may be able to gear a little higher (56/10 or 58/10) if you want or need a little more speed, but if you liked the way it was running on 88/14 then I would run the 56/9.

 

[Scx10usmc]

If it was running cool at 6.28:1, then it was fine. You may be able to gear a little higher (56/10 or 58/10) if you want or need a little more speed, but if you liked the way it was running on 88/14 then I would run the 56/9.

Ok another newbie question. How do I figure out the ratio

 

[Eric0424]

Spur divided by the pinion. 56 ÷ 9 = 6.2222 or 88 ÷ 14 = 6.2857. That symbol ( ÷ ) probably looks like a plus sign, but it's actually division.