What kv motor to match with an ezrun for a summit?

[suicideneil]

Higher kv simply means higher RPMs per volt- torque is determined by the actual motor size and construction design ( multiple poles, slotted stator etc etc).

The summit isnt really my idea of a basher, there are far too many delicate linkages and the locking diffs that dont like being used whilst the motor is spinning (lest they explode into dust...), plus the high CoG- its a trail truck for light-duty crawling really, but anyway...


Keeping that in mind, a ~2000kv motor on 4s, or ~1600kv on 6s would be ideal for a top speed in the 30-40mph range in second gear.

The Ezrun systems are about the cheapest option, though I wouldnt say the most reliable- that would be the MMM systems that are only a little more $ with Castle's excellent customer service behind them. HobbyWing (Ezrun) customer service is existant, but not the best- as is the nature of Chinese based firms quite often.

Since Medusa went out of business its impossible to find a suitable motor for something this size, meaning your next best option would be either a Neu of some description (CastleNeu, a real neu, or an ImpaktRC neu); the hobbywing motors dont seem to be the best quality from what I've seen & are prone to running hot, like all feigao-esque motors pretty much.

I would recommend a Castleneu 2200kv motor for 4s lipo, or a Neu 1515 2.5D perhaps for 4-6s lipo; the 2200kv motor on 6s will be hella fast and too much for the Summit's diffs to handle for terribly long.

Keeping that in mind, a ~2000kv motor on 4s, or ~1600kv on 6s would be ideal for a top speed in the 30-40mph range in second gear.

- the hobbywing setup claims 50mph, the summit has the same overall gear ratio as an e-revo so 40 is all it would go on 6s? I was really looking for 50 mph on 6s that way it could still be geared a bit lower and stay cooler. If I am going to run 4s for bashing and 6s for use with talons, would a 2000kv perform well with both setups?


-From what I have seen online and read, the mamba setup is horrible because of cogging. It useless under 2mph as said by someone who did a side by side comparison of the tekin vs mamba. If I were to run a neu, would cogging be a bad?

- do I need to worry about 4 pole vs 2?

[junkman]

I have a couple hw setups, and a couple mmm setups. For a crawling aspect the mmm is def smoother from get go, and would be much more suited for low speed crawling. The hw isn't really coggy, it is more less "jumpy" getting started, or trying to hold it at a steady slow speed, it just kind of pulses. I've never had a tekin so can't comment on that one. I have a summit as well, and honestly, I have just left it alone. It breaks as it is bone stock, so I could only imagine cartwheeling it at 50 or so, there is just too much gadgetry and it's just not really made for it. The long travel suspension and tires, (the talons would probably help) I just can't see doing it with that truck. If you are dead set on brushless, I'd pic up a mmm, and try to find a used medusa 1600 or something.