PS: your 21-23 tooth pinion idea is far fetched. I run a 1717 size 1650 Castle motor with a 200 amp ESC and I still only run a 14 tooth pinion.
Just because the Kv is low doesn't mean that the motor and ESC won't get hot.
Using a low kv motor and a higher toothed pinion will simply increase the amp draw as opposed to higher voltage that a higher Kv motor pulls. Larger pinion = more amp draw.
TLDR: your low kv motor and higher tooth pinion will run hot anyways, because more amps means more heat.
That 160 amp ESC would COOK with those pinions, and likely cut out due to high current protection. You might get away with a 17 tooth pinion.
If your Kv is lower, but your motor can size is not larger, you're going to be heating it up just as much as a similarly sized, higher Kv motor if you use a larger pinion.
Don't make the mistake I did, and think you can jump up a bunch of pinion teeth simply because your Kv is lower by 650 kv or so. That's not how it works unless you're doing speed runs: one speed pass, cool down period, second pass, cool down, etc...
You're assuming WAY too much temperature and amp draw headroom from a Castle system, let alone a d@mn Surpass Hobby system.
What size pinion do you run RN anyway? And how long did your Torox ESC last ?
People seem to think that they can compensate low kv values with bigger pinions. That only works to a certain degree.
If you mount a similar size lower kv motor, the torque and power output remains virtually the same at the same voltage, only the rpm value changed. It's not like the lower kv motor magically has the power to go big pinions on it. Going up 1 or 2 teeth on the pinion may be ok, more will likely be too much. The motor kv should be chosen to get the car to the required speed at a chosen voltage and moderate gearing.
If you want more speed, you need more power. That means a bigger motor, which probably has lower kv, but more power to drive bigger pinions.
Also, i don't understand why people would go from 6s to 4s and then use bigger pinions to 'get it back up to speed'.
Then they're using less power to run a more demanding gearing.
That's counter intuitive.
You have more power and torque on 6s! That's where you can use bigger pinions.
If you are trying to reach the same speed on 4s, you will be drawing excessive Amps.
@Opua. That 4282 motor would probably run best with 15 - 17t pinions. 21 -23t is excessive. A 1717 motor would probably run this car best with 18 - 20t.
So
@Trucking in space: you can go up at least 4t without any noticeable loss in acceleration, with that 1717. You are under geared at 14t.
@Trucking in space
I missed your last questions.
My Muraco has the stock motor and a MMX6S in it, running a 13t and oversized wheels (Copperhead 2). I can not run a bigger pinion. The system will overheat.
I do however run
Max6 systems and 4985 1650kv motors in my Asugas. I tried 23/46t gearing and they ran fine and cool on 6s. On 4s however, the batteries were struggling, so i ended up with 21t pinions.
Bear in mind that your 1717 motor on 6s is putting out roughly twice the power of a stock 4074 motor on 6s. That means you gear way up with that setup.