Mamba 6900 on ZX-5

6900kv seems like a lot for 1/10th 4wd. perhaps a 5700 would be better suited to the task ?

[jefierro]

Originally Posted by 83gt

6900kv seems like a lot for 1/10th 4wd. perhaps a 5700 would be better suited to the task ?

Could you elaborate further on that statement? I don't quite understand, is it out revolving the motor?

Originally Posted by jefierro

Could you elaborate further on that statement? I don't quite understand, is it out revolving the motor?

Not technically. On 2s you'd be within the motors stated limits, but I found the 6900 and 7700 CM36 motors to run very hot even in a lightweight setup. In my 1/10th 4wd buggy, I was able to move from 7700 to 5700, gear it up a a bit to compensate for the lost top end, and I ended up with a setup just as fast, but with much more manageable temps. As a bonus, the runtimes were much better as well :).

Basically i would only use the 6900 or 7700 series in lightweight onroad cars. When you start putting more load on them, they just heat up too much.

[DRIFT_BUGGY]

Originally Posted by 83gt

6900kv seems like a lot for 1/10th 4wd. perhaps a 5700 would be better suited to the task ?

I was running a 6900KV in my XXX4 G+ & BJ4 but that was only a 6 cell nimh. RC411/Xtreme RC ran the 6900KV motor and Peak 3200 Carbon Lipo when they did the review on the SP5 in May 08'. They had it geared at 17/78 and hit 42.0mph @ 191ft