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Shonen
RC-Monster Carbon Fiber
 
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Posts: 130
Join Date: Feb 2010
Location: Hilo, Hawaii
12.20.2010, 04:21 PM

I stuck one in my E-Revo.





It was rather difficult to fit. It required shaving a lot off the rear shock mount, and I also had to shim the transmission up with washers on the chassis so the 23t pinion could mesh with the 38t spur...the 36t spur causes more problems than it's worth, if you have a 25 or 26t pinion it will probably be ok. I also lapped the motor mount face to improve heat transfer but also move the motor as forward as possible, even if it was a miniscule amount.

Having ran my 1515 on 4s, the 1717's lower Kv makes the E-Revo a lot slower than I was used to, but much much more torquey, with less startup cogging (usually none). The 40mm fan on the motor mount keeps the temps way down...I doubt this motor ever saw higher than 120F. After most of our bashing/jumping sessions, it's barely over 100F. Currently running it on twin 4s 4500mAh Nano-Techs.

Quote:
Differential Ratio: 3.3076923076923075
Transmission Ratio: 1.8333333333333333
Other Ratio: 1
Spur Tooth Count: 38
Pinion Tooth Count: 23
Total Voltage: 14.80
Motor KV: 1580
Tire Diameter (inches): 6.1
Tire Ballooning (inches): 0
Motor Current Draw: 120
Motor Coil Resistance: 0.005
Spur/Pinion Ratio: 1.65 : 1
Total Ratio: 10.01895 : 1
Tire Circumference (inches): 19.16 inches (486.76 mm)
Rollout: 1.91:1
Total Motor Speed: 22436 RPM
Vehicle Speed: 40.64 mph (65.28 km/h)
Effective KV Value: 1515.95
KT constant: 0.86 oz-in/A
Motor Torque: 0.53 ft-lbs
Final Torque: 5.36 ft-lbs
Final Power: 1776 watts (2.4 HP)
Great videos guys!
   
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