Originally Posted by zackS30
Sand puts a rather large load bcuz the tires sink in and spin a lot, grass is thick and makes extra drag.
I really don't think that using a 8.4v NiMH will hurt it. I used a 2s lipo on my rs10 and it was fine. That ESC didn't have low voltage cut off or anything necessary for lipo use.
What kind of terrain r u driving on fortune?
there is a sticker on all EPX models that states 7.2v which is no greater than 3000mah. They don't even want you using a battery that would extend runtimes as that will cause more heat buildup. a 5000mah 7.2v nimh would be fine tho, IMO. But a 2s lipo or a 8.4v nimh will kill the esc.
The reason you can run a 2s lipo on the RS10 is because those extremely high turn motors pull very few amps. In fact, I have run 3 RS10 motors off of a single 27t brushed redcat esc (basically the same one from the epx) and it did not even get warm!
The lower the number of turns, the higher the amp draw. Those 70turn 390 size rs10 motors don't use much juice. that is also the reason you can get an hour of runtime off a 5000mah battery, when it would only last 15-20 minutes in a EPX model.
So, basically the rs10 ESC doesn't need a high amp capacity. And if yours ever dies, you can run both motors off of most any 27t capable esc. Something like a traxxas xl5 could likely handle 4 rs10 motors at the same time (since it is 15t capable at 8.4v)
Jang did a review of the sandstorm. He ran it stock first. then, and he mentions the warning sticker, he ran a 2s lipo. The esc died in like 5 minutes. The redcat 27t brushed esc's are as cheap as a esc can be. fine if used stock, but not capable of upgrading the motor or battery.
The epx pro models I think are well worth the extra $80 or so. The brushless system is many times better than the brushed. the speed of the epx might be fine for beginners, but the desire for more speed usually comes quickly. After years in the hobby, I can hardly enjoy running any model that isn't capable of at least 35mph...lol.