Tekno Help

[lincpimp]

Ok, your neu motor on 4s is turning avout 25k rpm, a bit low but you can gear it up.

Go with the smallest spur: http://www3.towerhobbies.com/cgi-bin...?&I=LXRJN2&P=7

And the largest clutch bell: http://www3.towerhobbies.com/cgi-bin...?&I=LXPWF4&P=7

This will get you about 38 mph with the std tranny gearing. You can get more speed with the wide ratio gear set.

This is the cheapest way to go faster, or you can find some taller tires, but new rims and tires can get over 100, while spur and pinion will be about 30 bucks. The wide ratio gearset is about 15 bucks IIRC.

Heres the calc info:

Differential Ratio: 2.8461538461538462
Transmission Ratio: 2.2941176470588233
Other Ratio: 1
Spur Tooth Count: 34
Pinion Tooth Count: 20
Total Voltage: 14.8
Motor KV: 1700
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.012
Spur/Pinion Ratio: 1.7 : 1
Total Ratio: 11.1 : 1
Tire Circumference (inches): 18.06 inches (458.83 mm)
Total Motor Speed: 25160 RPM
Vehicle Speed: 38.77 mph (62.28 km/h)
Effective Speed Rate: 2.62 mph/V (4.21 kmh/V)
Estimated Adjusted Speed: 37 mph (59 km/h) - 5% loss
Effective KV Value: 1700