I have a question- what pinion are you running with the 42t? spur gear- I think I saw an 11t item back along?
Running the numbers through the calculator, it says:
Quote:
Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 42
Pinion Tooth Count: 11
Total Voltage: 18.5
Motor KV: 2300
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.002
Spur/Pinion Ratio: 3.82 : 1
Total Ratio: 12.62937 : 1
Tire Circumference (inches): 18.22 inches (462.82 mm)
Total Motor Speed: 42550 RPM
Vehicle Speed: 58.13 mph (93.38 km/h)
Estimated Adjusted Speed: 54 mph (86 km/h) - 8% loss
Effective KV Value: 2300
KT constant: 0.59 oz-in/A
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Something isnt right. At a guess I would say either some esc setting sneed severe tweakage, or the motor is just too huge and cant spool up or something. Do you have a smaller 1515 or XL sized motor you can try with 1600-2300kv?