Question about a Neu motor

[ssspconcepts]

Here is some info from Brian's motor selector program...I wasn't sure what diff gear ratios are in the 8ight so I used 43/13. I also assumed you'd be running 4S and want to be in the 45mph range. I input values using a 15T pinion and 47T spur. You may want to go a little smaller on the pinion. Ideally you want the motor rpm to stay at or under 40K...I guess it doesn't hurt to push it a little over that every now and then.


Vehicle Weight (approx): 10
Desired top speed in MPH: 45
Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Additional Ratio: 1
Spur Tooth Count: 47
Pinion Tooth Count: 15
Battery Voltage: 14.8
Tire Diameter (inches): 4.1
Total Ratio: 10.3641 : 1
Tire Circumference: 12.881 inches (327.165 mm)
Required Motor RPM: 38236.172 RPM
Required Motor KV: 2583.525 RPM/V
Good Motor Choices: 7 XL (kv=2382)
6 XL (kv=2779)

Better Motor Choices: No motors of this class fit the parameters you entered.
Best Motor Choices: 1515 1.5d (kv=2700)
1515 1y (kv=2200)
1512 1y (kv=2750)
1512 2d (kv=2550)
LMT 1940/7 (kv=2239)
LMT 1940/6 (kv=2613)
1521 1d (kv=2900)

[ssspconcepts]

Here is more info on the Neu 15XX motors:

http://www.castlecreations.com/produ...rs/nm1500.html

BTW...Neil is right...if you run 4S on the 1512 1.5D that comes out to 48,840 RPMs, which most of the folks on here say that it is best to stay under 40,000 RPMS. If you look in the data I printed below...it looks like the 1515 1.5D or 1515 1Y are good choices.

I actually run in the mid to 40K range on one of my road cars and I manage t keep the temps low...but it probably isn't the best for the motor. One thing is for sure...I wouldn't push the motor to spec limits given the cost of those little gems.