Motor's I have tried in the Ground Pounder

This list will grow with time.

Below are a few tables showing the Spec's of the Mabuchi equivalents of the stock motor and a few others that may be of interest .  When looking at the chart's the last 2 digits of the part number denote how many turns the motor is . 

MODEL		VOLTAGE		NO LOAD		AT MAXIMUM EFFICIENCY					STALL
		OPERATING RANGE	NOMINAL	SPEED	CURRENT	SPEED	CURRENT	TORQUE		OUTPUT	TORQUE		CURRENT
			V	r/min	A	r/min	A	mN·m	g·cm	W	mN·m	g·cm	A
RS-540SH	7520(*1)	4.8 - 7.2	7.2	23400	2.40	19740	13.0	30.6	312	63.2	196	1998	70.0
	6527(*1)	4.8 - 9.6	9.6	23400	1.60	20040	9.55	31.0	316	64.9	216	2202	57.0

MODEL		VOLTAGE		NO LOAD		AT MAXIMUM EFFICIENCY					STALL
		OPERATING RANGE	NOMINAL	SPEED	CURRENT	SPEED	CURRENT	TORQUE		OUTPUT	TORQUE		CURRENT
			V	r/min	A	r/min	A	mN·m	g·cm	W	mN·m	g·cm	A
RS-550PC	8019(*1)	6.0 - 9.6	7.2	15300	1.40	13540	10.8	41.7	425	59.1	363	3700	83.0
RS-550VC	7525(*1)	6.0 - 14.4	12	17600	1.20	15730	10.1	58.3	594	95.9	549	5596	85.0

Stock 20 turn  540 motor 

On flat ground it has a reasonable amount of speed but has unsatisfactory torque and high temperatures with the stock 23 tooth pinion. Installing a 17 tooth pinion improved things but still wasn't to a level I felt was appropriate .


Pinion Tooth Count: 23
Total Voltage: 8.4
Motor KV: 3216
Top Speed (MPH): 25.73


Pinion Tooth Count: 17
Total Voltage: 8.4
Motor KV: 3216
Top Speed (MPH): 19.02


27 turn 540 Mabuchi  

With a 17 tooth pinion temperatures where good top speed was mild but enjoyable . The boost in torque was noticeable.


Pinion Tooth Count: 23
Total Voltage: 8.4
Motor KV: 2437
Top Speed (MPH): 19.49



Pinion Tooth Count: 17
Total Voltage: 8.4
Motor KV: 2437
Top Speed (MPH): 14.41


550 19 turn Redcat Racing part # 28446

Don't ask me why the motor is listed as a 19 turn when the code on the can states its a 20 turn all I can say is close enough.

This motor to me is a good first mild upgrade if you can find it on Ebay or such for less than $15 bucks. If its over $20 there are other options out there that can get you essentially the same motor or better for the same cash.

To be honest this is the motor that should have shipped with the Ground Pounder from the factor as it provides a reasonable top speed " but slower than stock" and plenty of torque with the included 23 tooth pinion . If you want a bit more speed you could easily install a bigger pinion and sacrifice a bit of torque for more speed. Or you up the voltage which would be what I would do .


Pinion Tooth Count: 23
Total Voltage: 8.4
Motor KV: 2125
Top Speed (MPH): 17

Pinion Tooth Count: 33
Total Voltage: 8.4
Motor KV: 2125
Top Speed (MPH): 24.39

Pinion Tooth Count: 23
Total Voltage: 12.60
Motor KV: 2125
Top Speed (MPH): 25.5

Leopard LBP3650/3.5D 3900KV 4-Poles Inrunner Brushless Motor RTR

Pulled this motor and the ESC from the Redcat Twister I am No longer running . All I can say is wow complete over kill Currently Running this with a 10 tooth Mod 1 pinion and the 43 tooth Mod 1 spur gear . After twisting  2 driveshafts I have lowered the punch level of the HobbyWing / Lansu ESC to 2 and am now lowering the timing to make it more drivable and to help safeguard the fresh shafts till upgraded ones are installed . 

Spec's

	Max Amps	Max Voltage	Max Power	KV (RPM/V)	Resistance		Dia. x Length (mm)		Length of Extend Shaft	Shaft Dia.	Weight
	86A	15V	1300W	3900KV	0.0075		Φ36.0×50		16mm	5mm	185g

Pinion Tooth Count: 10
Spur gear tooth count: 43
Total Voltage: 8.4
Motor KV: 3900
Top Speed (MPH): 25.55

(Not attempted yet )
Pinion Tooth Count: 10
Spur gear tooth count: 43
Total Voltage: 12.6
Motor KV: 3900
Top Speed (MPH): 38.33