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

Redcat Racing Gound Pounder Quality .

Well at this time I still like the Ground Pounder but I do have a few words of warning .

Construction quality of 1 I received and the one my step father have has proven to be vastly different.

Examples :

Several screws on my  truck are longer than they need to be .None of these are in places were they are a issue but it seems like they ran out of the right length screws and substituted what ever would work from what they had.

My step dads trucks shocks has had a mild amount of sticktion where the shocks hangup after not being cycled for a bit .

My shocks were horrible after a lot of work the rears are smooth as butter and the fronts are waiting there turn ( expect a post with pictures showing a tear down when I do the fronts ) .

His motor has 30-40 packs minimum through it and despite a hiccup its still chugging along my motor is junk after 5 packs . The arm that holds and applies tension to the brush broke off.

So am I mad NO I bough this RC to modify to my taste.



 

Redcat Racing Ground Pounder spec's

Redcat list some of the spec's for the Ground Pounder but it seems a few  are looking for more detailed information . More will be added as I have time.

Wheel Base 317 mm
Width          336 mm
Axle width  11'' inches hex to hex

Motor 20 turn 540 

ESC waterproof Hobby wing WP-1040

Rim size is 3.2 inch and uses a 12mm hex . Basically Common rims that fit the E-Maxx and T-Maxx will fit if you use 14mm or 17mm wheel  hex's there are lots of options . Most recommend the 3/4 inch stable maxx offset for additional tire clearance.

Tires are 3.2 inch inner diameter and 6.25 on there outer diameter.  

Stock setup doesn't feature foam inserts in the tires

Transmission ratio's and possible wheel speed stock.

Differential Ratio: 3.30
Transmission Ratio: 1.68
Other Ratio: 1
Spur Tooth Count: 81
Pinion Tooth Count: 23
Total Voltage: 8.40
Motor KV: 3216
Tire Diameter (inches): 6.25
Top Speed (MPH): 25.73

Pinion and spur Pitch is standard 48 pitch and not mod.6 as stated on the stock replacement pinion.

The smallest pinion that can be use with the stock spur gear and without altering the stock adjustment channel is a 17 tooth pinion.  

What pitch Is the Redcat Racing Ground Pounder Pinion and spur.

So what did I learn to day .

That Redcat Racing's part's Number BS701-019 is miss labeled . There website states : Pinion Gear 23T (.6 Mod), M3 Screw ~ . This is partially in correct it is a 23 tooth pinion but it not mod .6 / metric 48 pitch it is in fact imperial 48 pitch go figure . So don't waste your money if your looking to gear your Ground Pounder down  on .6 modual pinions as you will burn through a spur in no time.





P.S. if your new to the hobby the best deals on 48 pitch pinion gears is the Robinson Racing Six pack starter set Part # 1050 / 1055 .   
Part #1050 comes with a 16T 18T 20T 22T 24T 26T steel pinions Part # 1055 comes with 15T 17T 19T 21T 23T 25T steel pinion . There a heck of a deal at as each set normally sels for less than $16.00 .