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motor amp questions

Old 12-13-2012, 05:02 PM
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will using a smaller pinion cause my motor to call for less amps?
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Old 12-14-2012, 08:07 AM
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If your motor is drawing too many amps for your ESC and it's shutting down or overheating or it wants to much from low C batteries and you are cogging as a result, gearing down generally won't help enough, it's a hardware issue that is best fixed with different hardware.

If your question was meant to be phrased more along the line of using amps as a synonym for temperature then the answer is yes and no. A smaller pinion will make your motor run cooler until you go so small that you're driving at full throttle all the time and then the heat will actually increase.
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Old 12-14-2012, 12:39 PM
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thank you i was trying to figure out a new brushless system for my mini 8ght and can get at best 45amp batteries without modifying the tray. however the motors i am looking at call for 41 amps is a 4amp gap sufficcient?
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Old 12-15-2012, 11:26 AM
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How many amps a battery can put out is generally expressed in it's C rating, that is amps=C rating*mah so for example, a 40C*3000mah pack should be able to produce a constant 120 amps. Double check the ratings on the packs you're looking at, even for the low mah ratings common to 1/18th car packs, that seems to very lowly rated. Also, check the burst rate. It's usually double the constant rate, whereas a motor is usually rated at it's max amp draw. A motor that is said to draw 41 amps will do so only under max load but a 45amp pack should be able to burst to 90amps - more than enough of a gap to work Ok.
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Old 12-19-2012, 03:07 PM
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ok thanks, the battery is an 1800mah 25c,50c burst for my losi mini 8ight i know that peolple use the velineon 380 which can call for more than 41 idk the exact amps, but, they all mod the battery tray to fit 2200mah 25c and i could never cut up my poor little losi
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