Cheaper Alternative ESC for MM/8xl E-maxx??

[jhautz]

Well a feigao motor is going to get hot pretty much no matter what you do. Cheap and powerfull, but not really efficient.

I gree that 15/51 is rather conservative gearing already. How much does you maxx weigh? I dont really think the no fam thing would really matter from a heat standpoint, but what tires are you running? What is the diameter? Big heavy tires will make it heat up faster for sure.

Im not sure how much it weights, but it feels pretty heavy when I pick it up. Then again, I am more used to picking up a Rustler, so I dunno. Its not light, thats for sure.

The tires are whatever the stock traxxas Emaxx tires are. Kinda look like tractor tires.

[_paralyzed_]

try a 4s pack and see what happens, my weak link was the batteries and everything acted better when i got "real" batteries, how hot are your batteries when one running? if they are hot you need better batteries

For batteries I've been using two 7cell Tenergy packs. I know, Tenergy right. For some reason these two packs came from a VERY well manufactured batch. I've bought eight Tenergy packs since then and they are absolutely garbage. I've had these particular two 7cell packs now for over a year with close to 100 runs on each. They still pack soo much punch.

Anyway I could go on, but as for temps after a run, they are only warm to the touch. So I don't think my batteries were the problem. It turns out some of my MM settings were set for medium and not high. I've heard this results in a resistor being used to limit power and producing heat. Not sure if thats just a rumor but it makes sense theoretically.

Anyway I've got a MGM Compro 16018 on the way as well as two 3s packs, so, I should be in business!

[Hickoryhead]

Just a quick note. When I set up my EVO with a MM and a 1950 1800kv I found that when I plugged my 2 6000 mah 2s2p (ran in serious) into the MM with an RX pack just sitting the MM would heat up. Yes the MM BEC red wire was unpluged. I brushed my hand against is before I ever ran it. Hot to the touch. After I installed a UBEC no heat issue's what so ever. Just a thought.

That is very strange indeed to hear that the MM would heat up like that.

I'm sure with more tweaking, and possibly better batteries I could make the MM work for me without any problems. And a UBEC could be the cheapest way to get rid of my heat issues as well. In fact, with a new fan mounted on it, cooler temps outdoors, and higher settings programmed, the MM ESC now seems to be staying well within its normal temp range.

But I'm glad all this has resulted in me buying a whole new ESC for my E-Maxx. Even though it burned a hole in my wallet, I can now supply it with more power (6s lipo - I hope this isn't too much lol), and I can return the MM ESC back to my Rustler from which it was borrowed.

Originally Posted by BLRusty

For batteries I've been using two 7cell Tenergy packs. I know, Tenergy right. For some reason these two packs came from a VERY well manufactured batch. I've bought eight Tenergy packs since then and they are absolutely garbage. I've had these particular two 7cell packs now for over a year with close to 100 runs on each. They still pack soo much punch.....

Just an observation from someone who bought Tenergy before knowing any better (my 2 7 cell 4200mah packs are pitiful). I wonder if its just a time issue - as in the cells are sitting somewhere just for far too long? Mine acted like they had been sitting, after cycling at moderate chr/dish rates about a dozen time, they improved an improved and finally stabilized. The disappointment was how low an mah level they stabilized at, my 4200s turned out to be 3000s and they are slipping with less than 20 cycles.