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

Hello, I am new to brushless setups and I am looking for some insight on my current project which is going brushless with my summit. I have 2x 2s lipos already and want to run 2x 3s as well. Since all I do is bash I assume the 150a ezrun is the cheapest and most reliable setup? what I do not know is what kv I should get. does a higher number mean more torque? Also, what motors have the best reliablilty / warranty on them? Is the ezrun 4465 a good choice to run 4s and 6s vs a medusa or neu? Im not trying to break the bank but I do want something that will last and go through some bashing without overheating. Thanks

[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.

how do feigao motors compare to ezrun? imo a neu would be overkill and for the price it just doesn't make sense, but are the motors under a replacement plan at all?

here's a video to check out about the mmm, it goes against your opinion junkman so check it out and tell me what you think.

http://www.youtube.com/watch?v=rFCN8PSMej8

the summit is an e-revo so I don't see how its not meant for brushless. and there are not any better bashers imo. you could put spools in a mt but then your functionality would be limited. guess im just partial to the summit

so is the mamba 2200kv motor any good for the price?

[Nard Cox]

Originally Posted by liftedburban

and there are not any better bashers imo.

I would have to disagree with you on that one.

With the ERBE vs Summit I have to agree with junkman. There's a reason why Traxxas build two different cars. Imho the Summit isn't a 'great' basher because reasons mentioned earlier.

Anyway. I have a MMM combo in one of my trucks and I do recognize the stuttering and cogging at low speed, maybe it's my settings but it's definitely present at low speed, not that I care because I don't run low speed. The Tekin does have a real smooth start as can be seen from numerous of other vids on YouTube, like this one. So I do think that waiting for some more responses might be helpfull. Don't have any experience with the Tekin combo, heard that the Esc rules and the motor

[junkman]

In my opinion the hw motors are just as good a a feigao. I was comparing the mmm to the ezrun, which I thought was what you were planning to buy. I've never had a tekin setup. Just saying the mmm is smoother at low speed than the hw. I've never had problems like what they were showing in the video, but again I don't really do what they are doing in the vid, have 1 in a e-lst2, and one in an 8ight-t(mmm). and the hw stuff in a e-revo, and a 8ightb. The summit is based off the e-revo, yes, but stock for stock they are completely different animals. The e-revo is stripped down, no linkages running everywhere, locking diff mechanics, extra servos, extra trans gears, big heavy wheels hanging off it. Just 2 different animals.

yep and with that insight I believe I will go with the mmm 2200kv. gearing is the most critical with the summit but did some research and found a setup. mmm v1.2 i think is the best for crawling and for $50 more than the ezrun its worth it. you just don't get the fans. im still confused about speed, ive read 30mph in a mmm summit on 4s but basically with me running an mmm on erbe tires i would think it could be much more. and they are still almost identical. now I think ebay has an mmm for 247 which should be a good place to buy from, right?

hahah I love those people that say something isn't the best and then can't name one thing that is better. overall it might come down to setup. I could see the flux being a good basher but it has its limitations. for what I am doing there is absolutely nothing better than a summit thats all I said. to each his own you know

[Klausen]

Well I have a Summit, and it is a fine basher to me. I am running it stock, and it suits me perfect. Compared to my Mamba powered Aftershock, and my previous Mamba powered E-revo and Gorilla E-maxx, I think the Summit is quite fun to bash around compared to the others.

I heard about a guy running the Ezrun setup on his Summit, and it ran very well, untill he withched to 1st. gear at full power. Then it was over. Imo the Summit isn´t suitable for brushless power, but just fun to run in mud, snow and what other stuff I can throw at it.

[3905er]

I am currnetly running a MMM esc with a kb45 8xl . I am geared 24/62 with stock sized tires Proline Moab xl's . according to the calc good for 40mph with enough torque to throw the truck on it top literaly, all on 2 2s neu 5000mah packs . Using ver 1.20 software and no cogging and fast enough to get you in trouble. You can use both sets of batts with a gearing change you find a mmm for $150 and a kb45 for $50.00 .