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Old 12-30-2013, 04:48 PM   #1
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Default 5T motor current draw

Hi all,

as per the title, what kind of current draw will a 5T motor be capable of? I am trying to make some calculations as to what benefit I will get by increasing cable size or installing double deans etc. I have 70C batteries but I cant see 70x5A getting through anything in my car. What have people measured perhaps?

Thank you
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Old 12-30-2013, 05:23 PM   #2
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Hmm, what kind of car are you running?
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Old 12-30-2013, 07:33 PM   #3
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Modified tc, 2s.
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Old 12-30-2013, 10:39 PM   #4
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Ok I have done a bit of digging....

LRP x12 5.5 has a nominal power (in or out I dont know, assume output for now) output of 486W so at 7.4V that means at the very least 65A (I would assume that to be continuous rating). Seesh, I will do some calcs on battery, wire and connectors resistance and see if there is anything to be had. Acutally, I think this would be only of interest to a stock racer where a higher voltage at the motor means more power output for the same current and therefore less heat......

Any imperical readings would be great if someone has done some dyno work.....
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Old 12-30-2013, 10:39 PM   #5
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Ok I have done a bit of digging....

LRP x12 5.5 has a nominal power (in or out I dont know, assume output for now) output of 486W so at 7.4V that means at the very least 65A (I would assume that to be continuous rating). Seesh, I will do some calcs on battery, wire and connectors resistance and see if there is anything to be had. Acutally, I think this would be only of interest to a stock racer where a higher voltage at the motor means more power output for the same current and therefore less heat......

Any imperical readings would be great if someone has done some dyno work.....
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Old 12-30-2013, 10:55 PM   #6
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You're uh... doing a lot of unnecessary calculations.

Use TQ 13ga wire for the motor and 12ga to the battery. The wires you use isn't going to miraculously increase the power delivery of a motor, at least nothing that's even noticeable. You're better off just using the time to throw down more laps rather than nitpicking with voltages and watts.

Also, I think the word is empirical.
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Old 12-30-2013, 10:56 PM   #7
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You're uh... doing a lot of unnecessary calculations.

Use TQ 13ga wire for the motor and 12ga to the battery. The wires you use isn't going to miraculously increase the power delivery of a motor, at least nothing that's even noticeable. You're better off just using the time to throw down more laps rather than nitpicking with voltages and watts.

Also, I think the word is empirical.
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