Which Lehner

glassdoctor,

I don't know how old you are, but do you remember and movie with Robin Williams called "Good Morning Vietnam?" That part where he's doing his radio bit and making jokes about how hot it is. I could have sworn he was talking about the weather down here. It gets hot. In fact, I got to a point that I was running my nitro engines at 280 because I got tired of loosing the performance from having to run them so rich to keep them cool. I'd break 'em in to run hot and just kept bearings on hand.

Anyway, what do you think about the Hacker motors. If they are a good motor, I'd pick up an 11L (if it's better than the Feigao) and see how that runs. For the price, it can't be beat. Here I go again, talking in circles.

I think I'm trying to hard to make sure that I get the right motor. I'm making the switch to electric in the buggy because it's supposed to make my like easier. I don't want to wind up with a bench with a dozen motors on it because I couldn't find the right one. I just sold six nitro engines and threw six or so away.

Now you see this. This is how brain fried I am over this motor thing. Now I'm looking at the Hacker L can. If I go that route, I might as well get the 1512. Really, the whole cogging thing has me a bit worried. The Hackers are two poles and should run well with the MM. I'm just not confident that Castle has this issue on the front burner. Months ago, when I first got my Mamba Max 7700 system, they told me that they were working on a software rev limiter. That's why I got the 7700 to run on 3S Lipo. I thought, great...I can get insane and protect the motor with the software. Well, it's been a while and still no rev limiter. I could take quite a while for the "fix" on the cogging issue to come out.

The oddest thing about the cogging issue is that I emailed Castle about doing an emaxx build, before I decided on the buggy. They told me that none of their motors would work, and recommended that I use a Neu motor with their controller. I think it was the 1512. He said it was what he had in his emaxx. If he does, he should be more than aware of the problem.

Have you tried programming your MM on the 'puter? Did you play around with the timing settings, in conjunction the startup power and punch control settings? Since four pole motors are more sensitive to timing, I'm wondering if tweaking the MM could at least minimize the problem.

What settings are you running on your MM?

[jhautz]

Ive talked to CC a bunch of times about this. They are aware of the issue and at this time dont recomend running anything other than their motor with the MM. They also told me that 2 pole motors would be better and that 4 pole would be worse. I confirmed this for myself with my own testing.

The 4 pole cogging issues are not a secret and if you talk to someone there who knows whats up they will tell you too. They wouldnt be working on an update if there wasnt a problem.

It is weird though. I had a guy from CC at the iHobby show tell me that the Neu would be a good match for the MM also. He probably wasnt really up to speed.

Unless I'm mistaken, I think it was Shawn Palmer that told me that. I've found that they really open up with the info once they get the idea that you at least have some sort of a clue and that you understand that what you are doing is out of spec and not covered by warranty.

I don't know. Perhaps a "wait and see" posture would be in order at this point.

In fact, for the price of the Neu, I could get a rediculous L can motor for short speed runs at the parking lot, an high turn XL motor for tight tracks where I won't need more that 30 mph or so, and run the 7XL as a goto for all around running; and not have to deal with the cogging issues. After running a few different motors, I'll have an idea of what I'm looking for and what to buy. I'll then sell them off at half price and just get the Neu. At that point, I'll just have to hope that Castle has solved the problem.

Oh, I meant to ask. My motor came with this REALLY crappy wiring. I mean, ugly stuff. The wires seems as if someone went nuts tinning them. I can hardly bend them. The strands are really thick too. Is there anyway that I can get in there and rewire the motor?

[BrianG]

Those thick strands are probably the direct coil wires. Usually, they wind the coils with fairly thick gauge varnish-covered (for insulation) wire and simply bring the ends out to hook up the wires. Then, they apply some type of solvent to the end to remove the insulating layer and tin them. They are stiff because the wires are thick and are solid (rather than stranded like noodle wire). It might seem like a hack job, but has less resistance than attaching looser wires internally; one less connection.

They will bend, but since they are solid, I would try to bend them only once. If you bend them back and forth the wire will eventually break.

[glassdoctor]

Good movie.. I'm class of 91...

The stiff wires are normal.... some companies make them a littel more "pretty" but it's just the way it is. Even the Neus have the stiff wire, but it's neater and has black shrink instead of fat rainbow colored shrink.

The Hacker are a little better than the Feigaos but very similar. I think the biggest difference is quality control... tighter mfg tolerances. Right now I would pass on Hacker and just run the Feigao knock-offs... unless you get a killer deal on them. How much are these Hackers???

Shawn P has told me before that the Hackers are not impressive in efficiency etc compared to a Neu or Pletty.. and that the Lehners were somewhere in the middle.

Yes Shawn recomended the Neu... they still think the Neu are incredible motors, that nothing out there is better, more efficient. But I think they really didn't have a lot of actual bashing experience with them... more "lab" time... and #'s.

And I recall not having much problem with cogging when I first ran my buggy... didn't happen very often. It seems worse now. That's actually something I'm a bit concerned about... do the MM slowly crap out? Caps get toasted?

I would still reomend a Neu... but I can't blame you for waiting until the cogging is fixed. Why not just run the 7XL for now... get a feel for it and then you might know better where to go from there.

[glassdoctor]

Oh... as for those wires... I have taken pliers and a dremel to them to make them fit the 4mm gold connectors I use.

have any of u guys tried this..

go to the throttle curve and pull it tward the bottm right and top right corner?? when i did this with my mm 5700kv in my pede it stopped cogging, i put a point at 30 and pulled it twards the botton right hand corner a lil, and put my puch controll at 50% wth start up timing at low middle or high, and its coggless

mayby something to try idk..

[glassdoctor]

That should have the same effect as a more gentle throttle finger, or negative exp on the radio. I haven't done it with the MM software, no. But if it somehow helps, I will do it for sure.

BTW, I have never seen cogging with the MM motors... only with the Neu.

[BrianG]

Originally Posted by E-MAXX Rock's

have any of u guys tried this..

go to the throttle curve and pull it tward the bottm right and top right corner?? when i did this with my mm 5700kv in my pede it stopped cogging, i put a point at 30 and pulled it twards the botton right hand corner a lil, and put my puch controll at 50% wth start up timing at low middle or high, and its coggless

mayby something to try idk..

You know, you can save those settings to a file. Then open the file in a text editor, and post it here. Then, anyone who wants to try it can simply paste the text into their file and import it into the MM. The file does say not to edit by hand, but this does work since I've tried it. :)

thats cool!!! but idk, its on my moms computer because the stupid internet is a pita and my dad doesn want to fik it lol but i dont care...

but i will have to try that sometime

glassdoctor,

After what you said about the Hackers, they weren't such a deal after all. If you are interested, I mentioned the prices in my last post. They are on Hacker's site under "clearance."

I got my buggy running. I don't have any 4S lipos yet. I don't know what's up with Maxamps. Second order in a row that didn't ship in 48 hours as advertised. Anyway, I ran it on 3S with the 7XL. If there is better out there, I'd rather not know about it right now so that I can enjoy my blissful ignorance. It's a killer setup. I'm running a 14T pinion. It isn't really fast, but man does it take off. I can't wait to get it on the track.

I also picked up an 8L. I know it's going to run hot and I know I won't be able to run races with it. I just got it for the parking lot stuff. Nothing but short sprints and then a break. It should do nicely for that sort of stuff.

Thanks again for all of the help.

Oh, class of '83 here. Boy do I feel old. LOL.

[Patrick]

If I was you I would just run the 7XL on 4s for a while and see how it goes before spending another $280 on a motor. Unless you know you'll get end up getting a neu and can't wait or you want to sell the 7XL as hardly used.
I have one in an E-maxx (7XL), it's pretty fast and does rolling wheel stands easily in second gear.
Heat might be an issue with it in 15 minute races on a hot day, I'm not sure.
I've only had mine a month and it's been 90 degrees plus every time I've used it, the hottest it got was 155 with 12 cells and 51/13 gearing (I think it might be under geared by a tooth or 2 though), with the Rc-monster heatsink and no fan, running for 8-10 minutes. So with a lighter car, smaller/lighter wheels,correct gearing and fan it might be ok.
7XL shoud be fast enough to do 35-40mph in a buggie IMO. Heat after 15 minutes on a hot day would be my only concern, but then I don't have batteries that will last 15 minutes so I couldn't say for sure.

[jhautz]

I agree w/ Patrik. Run what you got for while and get a feel for what you like and dont like about the current setup. then you can make a more educated decision as to what you want in your permanent high end motor. And by then who knows... CC my even have the MM software update out and the cogging isseus fixed.



BTW: This is POST #1000 :)

[neweuser]

Originally Posted by AAngel

I got my buggy running. I don't have any 4S lipos yet. I don't know what's up with Maxamps. Second order in a row that didn't ship in 48 hours as advertised. Anyway, I ran it on 3S with the 7XL.

I would just shoot Austin an email. I'm sure he has a reason.