Help with hyper 7, 9xl gearing

[lydiasdad]

Originally Posted by sleebus.jones

Voltage shouldn't droop too much as those cells in a 1P configuration are supposed to be able to do 70A without a problem. The 9XL is a 74A "max" motor, so if it spikes above 74A, it's very brief.

So, if ya use higher turn, lower amp draw motors and then you can get away with 1P setups with the A123 cells.

Sleeb

Plus my buggy is under 8 pounds. That helps with the amp draw too. I am running the center diff locked for now also.
I just can't believe the torque it has. When I finished it Sunday night, I programed the speed control and set it down on the living room carpet for a test "run". I pegged the throttle and it did a violent wheelie, flipping back words, knocking every screw out of my parts box!:007: I will try to get a vid up.

[lydiasdad]

I wanted to post finished pics and report on the performance of this setup. As it sits now it is 8lbs 3oz. I charged by batteries and ran it very hard on concrete. I got 12-13 mins of runtime. Batteries were warm but motor was hot so I put some sinks on the motor. I also put a piece of foam rubber under the motor to support the rear.