Efficiency?

[crazyjr]

Is it possible that the batteries are responsible for the efficiency? The poster is running turningy 5200 30c 6s and his friend has a Thunderpower 3850 65c, and the poster says the cells in his are getting puffy. I think it could be the higher c rating and the higher quality packs used adding to the efficiency. Looking at the c rating alone, I see it as sort of a resistance to discharge, as well as a show of handling of the load. higher c rating, to me, means to some extent longer runtime per mah, 156 amps(30c) verses 250.25 (65c) shows me the 3850 should run longer than the 5200 anyways

[brijar]

I know it seems wrong, but he runs less punch control than I do. I have mine set to 75% and I think his is closer to 30%, if any. I do like to go fast, and with the 25t pinion, I cannot reach full throttle without a very long and flat street.

I remember that my packs wouldn't change temperature at all when they were new, but now they are warm to the touch after a run. Maybe 80F, depending on how hard I drove.

I know his is geared crazy high, but since he uses 1st gear a lot, it isn't awful. Somehow his motor has put up with it. My ideal speed is 60mph on 6s, so I geared it to hit about 70 on paper. Not sure if that is unreasonable or not.
My friend is always going on about how he can put his radio to 120% and actually make it go faster. I'm quite sure that he is only changing the endpoint and that simply makes him reach full throttle faster which makes the last 1/16th inch of throttle travel useless.

Lately we have taken to playing tag with the trucks, so we tend to travel about the same distance.

All the factors point to him having a shorter runtime, but I guess I just have a heavier finger. I do think that my batteries have something to do with it. How could I go about measuring the IR of them? Find a big resistor? We have fancy oscilloscopes and other meters here at school, but I don't think we have any ESR meters.