Lehner 1930/8 in 1/8th buggy, first impressions (#%*@! rain)
 

1/8th buggy used: My Sportwerks Mayhem Pro here

Other motors used in buggy: 7XL geared 14/46 (40 mph), 8XL geared 14/46 (35 mph)

First off, this motor isn't much to look at. When I got my first XL, I remember how heavy the box was that it shipped in, and it was the only thing in the box. Then opening it up and saying,"now that's a motor". When I got the 1930/8, the box seemed pretty light, and I had a couple gears and connectors with it. I opened it up, and it was nicely packaged. But, this thing is not much bigger than a Mamba motor, and not much heavier either.

Needless to say, looks can be deceiving! I geared this at 12/46 (37 mph) since it is a higher kv than the XL motors I was running. I only got to run it for about 15 min just before dark, but I am impressed! Speed seems about the same as the 7XL and the acceleration seems about the same as the 8XL! In fact, this is the first time that the acceleration seemed "out of control" (like MM 5700 on 3s in my MT2). It was even starting to lift the front end up under hard acceleration (never did that before). That could also have to do with the lighter weight or the Road Rages breaking in, as well as the motor. I did hard speed runs and full throttle starts (hard braking too) for the 15 min, and temps were 150 for motor (no heatsink) and 150 for Mamba (no fan). Of course it is too soon to get a feel for "real temps" without more running, but the XL motors would be about 170 - 180 under same hard running (with Monster heatsink). And Mamba would be about 160 - 170. Even low speeds were great, with excellent throttle control throughout the range. I could always go about walking pace or a bit slower with the XL motors, but this motor can even go at about a snails pace. And of course, not a spec of cogging!

All in all, this motor may prove to be more well balanced with the Mamba Max and the 5000 mah lipo (lipo also ran cooler). I am also hoping to see more run time; I was getting 20 min with the 7XL. Guess I should save the rest for when the #%*@! rain quits and I actually get some run time on it!

Is it amazing what a high-quality motor can do? The Feigao/Wanderers are no slouches, but there is a reason why they are a fraction of the cost...

Bruce, I know what you mean. I recently got a Neu motor. I got the 1512 and when I first got it, my first impression was that it was short. Very short. I wired it up anyway and at first was disappointed with the performance, but it turned out that I have a mislabeled motor. Once I geared it for a ratio proper for what the motor actually was, the power was unbelieveable. It is amazing what a quality motor can do.

As for picking the front wheels up off of the ground, what settings are you using with the MM? I'm running no punch control with the highest start power setting and the lowest timing. When I ran the Neu in my buggy, I could pull the front wheels off of the ground just about at will. Getting the truck to pull the front wheels off of the ground was just as easy.

BTW, you should check out zeropointbug's thread about his fried Quark. The thread went off on a tangent and we began talking about experimenting with adding capacitors to our speed controllers. I added four caps to my MM and no matter how hard I run it (I am running a 1" fan) it doesn't get over 140 or so; and when I run it, it's on a track for 20 and 30 minutes at a time.

Good going with the Lehner. I'm going to have to pick one up to run with my MM escs. I'd really like a 1940, as a few have said that the 1930 runs hot in a truck.

Well, it's starting to look like the MM is very well suited to the Lehner's, great combo. And with those temps and what you have said how it performs, it looks like it is a better combo than the Quark/Neu, for cheaper, and no esc modifications needed at all. :eek:

Yeah, modding an ESC is what kept me away from the quark/neu combo.

And I did want a 1940, but couldn't find one, this may however work out better in the end.

I went back and forth for a long time debating over the Lehner/mm or Neu/Quark decision. I would have gone for the Lehner and MM, but by the time I knew what I needed and was ready to buy, the Lehners became very scarce.

Since I have 5 MM escs, I may just sell my Quark/Neu combo for the price of a Lehner 1940. I'm am now on my third Quark, and I had to do the cooling mod on it. I also have six additional caps on it and am running it with a 1/4" thick heatsink that is attached to my chassis. Even with all of this, it still doesn't run as cool as my MM does, which is just servo taped to a mount.

OK, I'm getting off on a tangent here.

I'm glad to here that the Lehner is running so well for you. You lucked out getting that.

Yeah, the small motors are spinning up like nothing else; rather weird; i am impressed by the small motors. they seem to accelerate like nothing else if geared properly.

Viruss managed to get his 1930/8 run 50mph on 4S in his buggy.

It was the last one Mike had, figured I better get it and give a try. Hope I get a break in the rain tomorrow to get some running in.

I may try the caps on the MM if it runs too hot (be nice to stay away from fans). You not using a fan on yours?

I like the smaller motors too. They are almost like driving a hopped up small block, because they rev so quickly and are very responsive. I had forgotten how they feel because I went to the XL motors to try to get away from some of the heat that the L can motors generated.

Now that I got to run the Neu 1512, I'm reminded of how nice they are. My only concern is how well they will hold up during long races in terms of heat. When I was running my Neu (I believe it was a 1400kv motor) on 4S geared 16/44, I was able to get the temps up to 160 in a short period of time. That surprised and worried my. I had initially ordered a 1900kv motor and am waiting for Neu to correct the situation. When I get the 1900kv motor in, I'm going to give it a try and what happens.

Aangel; you got confirmed from Neu that the KV of that neu you had wasn't what it should be?

I am running a fan on mine, but...the last time I was out on the track, I was running the MM with four caps attached to it running a 9XL geared 14/46 in my 8ight truggy on 4S lipo. At some point during my running on the track, the fan on the esc got bashed in and it wasn't working. After running for 30 minutes, the motor temped at just over 200 and the esc was at 150. When just playing around the esc will get to about 135 without the fan. With the fan, it gets to less than 120. When running the fan and on the track (30 minute practice sessions) the temps get to about 135-140.

I don't know if my results will be typical, but for me adding the caps made a difference. I believe that others have had similar results, but your mileage may vary.

Serum, I still don't know. I may have misspoke in my post above. I should have made it clear that getting a mislabeled motor is what I suspected. Considering that the motor was running so well, it was the only conclusion that I could come to.

When I initially called Neu about it, I asked what the possibility was that I got a mislabed motor and the guy I spoke with responded with, "it's a possibility." Their labeling process consists of the guy who built the motor marking one of the motor leads with a marker. On my motor, it was marked 1512/1.5Y in very small writing. This first labeling is what is used to make the labels for the endbell and the box. If it is mismarked after being wound, the mistake will not be caught, except by the end user.

I was under the impression that Neu had some sort of QC in place that would catch this, but apparently they don't.

In any case, it was a nice motor. On the other hand, perhaps the high temps that I was getting was due to a defective motor. I am just patiently awaiting my Neu to come back so that I can try it out. I'm still leaning toward sticking with the MM and getting a Lehner, if I can find one.

Yeah, at your side of the sea the lehner motors are getting rare..

I wonder how long Neu needs to come up with a solution.. Thanks for being the test dummy..

Yeah, dummy is right. If I had any brains, I would have put all of this stuff aside long ago.

Yeah, we all should..

It would have released our lovely ladies from some stress.. :005:

Oh, I don't even want to start on what my wife thinks of all of this. Not too long ago, she was going through the bank statements for my personal account to do the taxes. She thought it would be funny to let me know how much I had spent at my LHS last year. The total came to over $8000. I could have stood not to have known that, but I didn't tell her that the total didn't reflect my cash purchases and purchases on line. She kept asking me what all of the paypal charges were for. If she ever gets into my paypal account records, I'll be a dead man.

LOL!

yeah, i get these things from time to time.. some meaningless sums, pointless numbers i don't even remember.. Buy flowers, and you should be fine.. Our house is known as the greenest one around..

My wife likes plants. It works well for me too. She kills everything she touches, so buying her plants never gets old.

LOL

If she ever gets mad... pause, then pretend she is a puppy dog, ooshy booshy, you so cute...!

You two are a match from heaven.. Ever realized how much you have in common?

Hey, I don't kill everything that I touch. It's just a run of bad luck that I've had lately. Her killing plants has been going on for years.

What my wife and I do have in common is a love of fine food and good wine.

Or at least kept them from putting the stress on us, lol.

Philosophical..but a valid point...

Well, I got another 20 min run before the #%*@! rain came back. Just more hard street running. Motor did get up to 175, guess it is time to pull the pretty sticker off and put a heatsink on there. Mamba was 155, no fan, so thats not bad. Lipo was just over 100, very nice, this combo sure isn't pulling the amps like the XL's did. In fact, after 20 min (my old run time with XL's), the 5000 mah battery pack still had some left (I'll find out how much when I recharge it). I was hoping to find out what my new run time is going to be, but with rain starting again and temp up to 175 without a heatsink, I figured it was time to quit. Need to get a heatsink before going for run time.

Bruce, I know that 175 is higher than you'd like, but it's still not bad after 20 minutes of what I guess was WOT runs and a lot of pulling wheelies. If that had been on the track, it probably wouldn't have gone over 150. All in all, I'd say it was a successful setup and run.

How was the power?

Power is great, I couldn't get the front end up with the XL's and now I can. The same "punishnment" with my XL and monster heatsink, would have had the motor at critical mass. Yeah, normal running would be cooler, And I had no heatsink on it at the time. I'm still gonna get a heatsink on it to keep it cool!

Also looks like I put about 2/3 of a charge back in to lipo, I may be able to get 30 min run times with 5000mah!

bdebde,

I have been playing with a 1930/10 on 5s in my buggy lately and I have to say I'm really liking it too. The thing really ripps. I switched from a 1512/2.5d and quark 80B to the 1930/10 and MM and I feel like it has MORE power. It ran very reasonable temps and I was able to wheelie the buggy which never happened on the old setup. I have run a bunch of different setups in this buggy over the last 5-6 months and this is one feels the best (at least so far). I havent gotten much run time on it yet cuz I had some problems the first time I ran it with a poor soldering job I did and then I was just out basically beating it see If I could make my resodering job fail and then I have been traveling alot the last couple weeks.

I really like the 1930 for a buggy so far. So its all in one place, I'll pick up on this post and post my observations with the setup once I get some more run time on it.

I think if Mike will not be carrying the Lehners anymore, we'll be in some trouble for sure.

I hear he sould be getting "some" soon.

Oh, Mamba settings were at defaults for all these runs (except lipo cutoff), motor timing normal. I wonder if going to low or lowest on the motor timing would bring temps down further?

I LOVE THIS MOTOR!!! I got to run a full pack through it, start to finish. I wouldn't want to run a 30 min main with my 5000mah pack, it dumped right at 30 min. (was getting 20 min with XL motors). I did put a small Integy clip on heatsink on it. It looks like this motor runs at 175. After 15 min I had the temp up to 175, checked it a bit later and it was down to 165. Temps throughout the remainder of the run were from 160 to 175, never got any hotter. Mamba temp at the end of the run was 165, and battery was 120. I think we have a winner! Just wish I never spent the money on the two XL motors, trying to save some $. Now I have to retune the suspension as the buggy is so much lighter now, but I can live with that, lol.

It sounds like you have hit gold. Those temps might be considered to be a bit high by some, but they are within acceptable range.

I am very anxious to try out my Neu 1512. I hope that my temps in my truggy are about like yours.

The 1930 and the 1512 are roughly the same size right? rotor?

I remember Serum talking about the 1930 being a very quick and responsive motor in a lighter truck, I didn't really believe it could be though. I can see why now...

AAngel: Let us know how your Neu motor performs once you get it back?

I was a bit sceptical that the 1930 would be enough motor. But it has no problem running the light weight buggy.

I need a little input on battery selection now. The 5000 mah maxamps runs right at 30 min so I will need a 6000 to go for a 30 min main. Only thing is, all the tracks around here seem to run 15 min mains. I am leaning towards the Flightpower 3700's to further reduce the weight. They will put me under 7.5 lbs and make left/right balance nearly perfect. The discharge rate at 25C is nearly that of the maxamps 5000 at 20C. I think someone here is running Flightpower 3700's, I'd like to know how they work out. Or I could get the 4500's at 30C but they are pretty spendy! Any other thoughts on batteries for this motor and light buggy appreciated.

Great to hear you are happy with it. As for the battery question, I dont run the flightpower packs but I run packs that use the same cells in the 4350mah size and they are great Never even break a sweat. I would imagine that with this smaller 1930 motor setup you wont have an issue with overloading them. Plus the RTR weight will be down even more so you should draw even less current.

I think you are on the right track with getting the 3700 packs for the 15 min races and then just running 2 paralell 3700 packs stacked for the long 30min mains. Might be hard to fit 2 of the 3700 packs under the lid though.

I run 6s Evo20 3700mah packs and with the 1950/10 in my all metall SuperMaxx with a slipperential and 20/36 gearing, the thing almost makes wheelies if you give it enough throttle. If it weren't for the duct taped tires, I think the truck would have flipped, easily.

Also, the 5000mah FPs are lighter than the MaxAmps. AND WAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAY stronger>>>>>>>

Does anyone have any idea of what cells are used in the Neu packs? I was on the Diversity web site and the 20C Neu packs on on sale.

Although I haven't gotten my motor back from Neu yet, I'm already anticipating having to rethink my whole setup. I've been running the 8Ah packs, but with the 1512, I should be able to start running smaller, lighter packs and still get the runtime that I need.

No, and I doubt Steve will divulge that. There was a bit of a ruckus over at rcgroups when his packs were tested against some of the popular packs available and came out on top.

The point of contention was the fact that the test was conducted by Steve and then allowed to be published in a magazine.

Yeah, by the looks of the discharge graphs, they seem to be very potent cells they use, flightpower equivalent.

I think the Neu cells are Enerland cells, which are the ones used in Flightpower.