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Old 16-04-2009
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Marvin Marvin is offline
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Join Date: Jun 2008
Location: Maidstone
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It all depends on the voltage and gearing used. A lower kV (like the 1700), with a high voltage (say 5S or 6S) and the right gearing is just as fast as a higher kV (like the 2100), with a low voltage (say 4S) and the right gearing (if you are aiming for a certain speed (40mph ish is about right for most tracks)) then the differences will be minimal. Only thing is the higher voltage, lower kV set-up will tend to run slightly cooler as the current is reduced over the other set-up.

To give you an example, I'm using a 2000kV motor with 4S, a 15T pinion and stock spur/internal ratio. This gets me enough speed to keep up with the nitros on the straights (perhaps just beating them), but thrash them out of the corners.

The Losi ESC has a BEC circuit which jumps the voltage down from whatever the input voltage is, to about 5.88V for the receiver and servos.

To work out what motor, pinion, voltage etc would be best for you this site is soooo useful
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