kyosho buggy 7xl gear

[steveo]

i am about ready to chose some pinion gears and i dont know off hand what size the center diff is, could some body offer a good base line and i have read to gear for 45mph for suffient load on the motor, the buggy will be raced how fast should i gear for that 40 mph

[bdebde]

40 mph seams to work well for most people for racing (me included). Center diff is most likely 46 teeth.

[steveo]

do you know what size pinion that would be about, i never can get that speed calculator to work for me

[bdebde]

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 14
Total Voltage: 14.8
Motor KV: 2382
Tire Diameter (inches): 4.1
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.0056
Spur/Pinion Ratio: 3.29 : 1
Total Ratio: 10.86813 : 1
Tire Circumference (inches): 12.88 inches (327.17 mm)
Total Motor Speed: 35253.6 RPM
Vehicle Speed: 39.57 mph (63.56 km/h)
Effective KV Value: 2382
KT constant: 0.57 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

[steveo]

wow thanks, i'll buy a 13,14,15 to start