10mm shorter in length and smaller shaft (3.175mm vs 4mm on the 1950) according to the LMT website...

Thanks Brian.

Another question.........

I would like an ESC that behaves like the EVX did. Forward, Backward, and brakes. Nothing funky, no wierd delays, etc. My truck is not race only at this time and I like to use reverse sometimes to get out of a jam.

What ESC offers the best "trouble free" user friendly operation?

I'd rather spend more on the ESC & have to settle for a Feigao "XL" and have a reliable easy to use system then something tempermental, quirky, and ragged edge.

So which one(s) are the best? Quark, MGM? (no one ever seems to talk about them......), BK?

How is the BK software?

Thanks for entertaining the large number of questions I have!

BK is about the easiest you can use IMO. Easy programing, a lot like the evx. You could get the 9920 and be good on 5s. I have ran my 9920 on 5s 10xl and it's good to go!

Is it smooth? Are there wierd delays going from forward to reverse? Anything unusual with the brakes?

Anyone have the software I could look at????

There are no weird delays. The nice thing about them, is the soft brake, so it just don't slam into reverse when you hit the reverse, it brakes nicely, then goes into reverse. You will need an LVC, but that's easy to put in, just connect it to your UBEC plug and you're good to go. Get the Li Savaer Mike has, it's for cars.

I assume that the LVC is not needed until I move to Li-Po correct?

Also, in you opinion would it be worth the additional $75 to get the 12020 given that it's on a MAXX that will weight 9-10 pounds?

Correct. The 12020 would be a nice addition, but the 9920 is up to the task. How many cells are going to run?
My maxx used to weight 12.5 lbs with the 9920.

12, 14, or 16 NiMh GP3300's for the near future. Specifically i was planning on 16 but could easily back it down to 14 if the motor or ESC would perform batter as a result.

My weight estimate may be off. Maybe it will be 11-12 lbs. Still not together enough to weight it!

I used to run the 9920 on 5s and 16 cells, no probs.

The shaft on a 1940 is 4mm. Other than that its a little shorter than the 1950. The 1940 is PLENTY of motor for a maxx. I really love mine in my maxx. Its actually my favorite maxx motor right now. If you can swing it go for the Lehner 1940. Totally worth it IMO.

The BK controllers have a great braking/reverse setup. But the quark is the smoothest. Not a huge difference though. I have not tryed a MGM... (still on the to do list someday) so Im not sure how that compares

The 9920 will handle 20 cell or 6s Lipo. The Quark is rated for 6s, but doesnt really do well with it IMO. 17cells or 5s is about its limit. It starts to get weird cogging issues at 6s. Not an issue if you are looking at 16cells or 5s max.

The MGMs with the newest software are supposed to be great. They runn the 4 poll Neus just like Quark from what I hear. They also had that weird braking blip fixxed.

I would not push the 9920 to 6s! Nor would I push it to 20 cells. Mine ran warm on 16 and the 5s, it would definately run hot on anything more. Unless you geared your system down. If you were going to run more cells, then go for the 12020. Why push the esc to the limitations? :032:

I thought someone here said that the Quark had a wierd delay or other quirk with the reverse or brake action? Am I mistaken?


Where would I get a copy ofthe MGM or BK software to check out.

For the BK software, just go to the bk website. Also, the Quark does have a delay. ou may be able to find that on the Sky tech website, not sure though. I'm bad with references! Sorry man! Looking for a rear skid are ya? LOL

Yeah, the Quark doesn't have a brake in reverse. So, if you are moving in reverse and then throttle to brake, the controller will simply go forward without stopping. A little hard on the drivetrain.

However, there is a setting that does help a little - I think it's adding some drag brake, but don't hold me to that.

@Jhautz: I wonder when LMT started putting a 4mm shaft on the 1940's. According to the LMT site, the 1940 and below have 3017mm axle diameter, while the 1950 has a 5mm axle (I apparently was mistaken before about the 1950).

Not really, but I have new 3mm Ti skids from GA and they are heavier than I thought so i f I can snag a deal on some 2mm Ti skids that would be cool. No need for the additional weight really.