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lincpimp · 05.13.2009, 12:57 AM

If you plan to keep the gearing for 55 I would go with a motor that will top out over 40k rpms, and be as long as possible. On 6s that would be about 1800kv-2000kv. The muggy does not have that much gear reduction anyways, so gearing it up for the speed will not be very difficult. I am not too familiar with the big tekin motors, but the truggy length models look like the ones to use. Not sure if your 20c? lipos will hold up. 12 lbs trying to do 55mph will be putting some load. I would use a lipo good for 150amps cont on 6s, so a 5000 30c.

Looking at the tekin motors and the speed calc, I think the 2000kv 4038 t8 motor looks to be the best bet. With 6s motor rpm will be around 45k, and you can use a 14t pinion to get 55mph. Keep in mind that you will not be able to gear much lower than a 12t, which will get you down to 45mph. Not too bad, but that is as low as you can go on 6s. You could swap to 5s and lower motor rpm if you wanted to gear slower.

Will this run cool? I have no idea. The tekin setup is new, so who knows if it is any good? Just throwing that out. I would be interested to see your results, especially with those lipos, as I think you will work them hard.

Heres the speed calc with the setup I proposed.

Differential Ratio: 4.090909090909091
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 14
Total Voltage: 22.2
Motor KV: 2000
Tire Diameter (inches): 5.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 3.29 : 1
Total Ratio: 13.44156 : 1
Tire Circumference (inches): 17.28 inches (438.88 mm)
Total Motor Speed: 44400 RPM
Vehicle Speed: 54.05 mph

	(#3)
lincpimp Check out my huge box! Offline Posts: 11,935 Join Date: Aug 2007 Location: Slidell, LA	05.13.2009, 12:57 AM If you plan to keep the gearing for 55 I would go with a motor that will top out over 40k rpms, and be as long as possible. On 6s that would be about 1800kv-2000kv. The muggy does not have that much gear reduction anyways, so gearing it up for the speed will not be very difficult. I am not too familiar with the big tekin motors, but the truggy length models look like the ones to use. Not sure if your 20c? lipos will hold up. 12 lbs trying to do 55mph will be putting some load. I would use a lipo good for 150amps cont on 6s, so a 5000 30c. Looking at the tekin motors and the speed calc, I think the 2000kv 4038 t8 motor looks to be the best bet. With 6s motor rpm will be around 45k, and you can use a 14t pinion to get 55mph. Keep in mind that you will not be able to gear much lower than a 12t, which will get you down to 45mph. Not too bad, but that is as low as you can go on 6s. You could swap to 5s and lower motor rpm if you wanted to gear slower. Will this run cool? I have no idea. The tekin setup is new, so who knows if it is any good? Just throwing that out. I would be interested to see your results, especially with those lipos, as I think you will work them hard. Heres the speed calc with the setup I proposed. Differential Ratio: 4.090909090909091 Transmission Ratio: 1 Other Ratio: 1 Spur Tooth Count: 46 Pinion Tooth Count: 14 Total Voltage: 22.2 Motor KV: 2000 Tire Diameter (inches): 5.5 Tire Ballooning (inches): 0 Motor Current Draw: 0 Motor coil Ω: 0 Spur/Pinion Ratio: 3.29 : 1 Total Ratio: 13.44156 : 1 Tire Circumference (inches): 17.28 inches (438.88 mm) Total Motor Speed: 44400 RPM Vehicle Speed: 54.05 mph Alot of Savage parts for sale!!!