I Need Motor Help!!!

[satttheman]

iight guys im doin a muggy conversion and i was goin to just do a 10xl but my original plan was for a 1521/1y. but now im confused decisions, decisions, decisions. well anyway i need some help im goin to run 6s no hv setup for me not yet. but my motor choices r the 10xl, a 1521/1.5d, a 1521/1y, or the 1527/1d( i kno its a high kv motor its like 2100kv and will prolly draw crazy amps but it should still be a torque monster) have a neu 4900 25c that will be in the truck and it a decent battery so it needs a good motor. coming guys help me out here.

[suicideneil]

Racing or bashing?
6s esc limits your options to a handful of controllers- Quark, MGM, Jazz maybe, or the MMM, unless you can live with a forwards only + mech brake setup = airplane escs at your disposal.

I think a lower kv like about 1500-1700 for 6s, then with those larger Neu 1521 motors you will have greater torque for higher gearing, and speeds easily in excess of 40mph+, with cooler temps and longer runtimes to boot.

The battery you have is a 6s item I take it?

[tashpop]

i really don't know why there would be a toss-up between the nue motors or a feigao. seems like an easy decision if you're willing to spend the money.

[satttheman]

well at first it was easy at first just get the neu and then i became hard when child support hit me for almost 330 a week but im thinkin since im goin to do it do it right but im thinkin the neu 1521/1.5d the 1860kv do u think this would be a good 6s motor or should i go with the 1521/1y that mike sells

[bdebde]

I think either motor would be great, it may boil down to what you can find in stock.

[satttheman]

ordered the 1521/1y i hope i like it i wanted to 1521/1.5d so ill see how it is

[satttheman]

muggy mounts are available

[satttheman]

i think the 1521/1y was a great choice check out the vid

[xcntrk]

Great vid!

I’m curious how that crazy torque in your vid translates on paper (using BrianG’s calc)? What’s your muggy’s front/rear diff gearing and tranny gear ratio? I’m interested to see what your calculated mph and ft-lbs torque equal versus what was seen in your vid…

~Thanks…

[satttheman]

the muggy diff ratio is 4.09
the pinion was 22
the spur is 46

[bdebde]

Hard to believe it is 22/46 (according to vid) gearing!

Differential Ratio: 4.09
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 22
Total Voltage: 22.2
Motor KV: 1577
Tire Diameter (inches): 5.7
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.008
Spur/Pinion Ratio: 2.09 : 1
Total Ratio: 8.55182 : 1
Tire Circumference (inches): 17.91 inches (454.84 mm)
Total Motor Speed: 35009.4 RPM
Vehicle Speed: 69.42 mph (111.51 km/h)
Effective Speed Rate: 3.13 mph/V (5.02 kmh/V)
Estimated Adjusted Speed: 63 mph (101 km/h) - 10% loss
Effective KV Value: 1577
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified.

[xcntrk]

Strange, that doesn’t seem to add up…

At max voltage the 1521/1y is rated to draw 75amps. With your configuration (at least according to BrianG’s calc) that’s only 2.86ft-lbs torque with a crazy top speed of 63mph. The smaller torque number is what’s strange. Your vid clearly didn’t look like only 2.8ft-lbs torque as you were easily pulling the front-end a decent speed.

???

[bdebde]

max amps = watts/your voltage; more like 135 amps

[xcntrk]

^not this again. Nobody can seem to explain this to me. Sorry for the noob lack-of-understanding here; but how can you calculate your watts without having an amperage figure?

Where is the 2997w figure coming from?

[bdebde]

Max watts of motor is 3000, But to be accurate you would need an eagle tree or other accurate amp reading.