1:10 or 1:12 scale project wanted...

Alright guys, I talked to a friend that is really into brushless to see if he had any motors he wanted to sell. He has a FDM 10L and a Lehner basic XL 3100. He actually gave them to me to try out. If I want them he said $50 for each, $100 for the pair. One has 5min runtime on it, the other one has 6min runtime on it, so they are practically brand new! Should I just get them both? I have no way of testing them now though. What do you all think?

Thanks

Bye:018:

[Procharged5.0]

I'd say if you trust him, buy them. The price is right!

I might even buy one off you if you didn't want it.

Originally Posted by Procharged5.0

I'd say if you trust him, buy them. The price is right!

I might even buy one off you if you didn't want it.

I trust him, he's cool, so I guess I'll get both. Also the basic XL is pretty short, the same size as the MM motor, I thought it would be bigger(and that's not what she said):005:...

Bye:018:

[BrianG]

Well, I got a pack's worth of runtime at the track this afternoon. Wow, it's fast! I geared down to 12T and it was still too fast for the small track in town here. Temp of the ESC was still kinda high, but it was 92*F outside and in direct sunlight. So, I'm thinking of getting a 6 or 7L motor, or equivalent longer motor with ~3500-4000kv.

[skellyo]

Which motor are you running? I can't remember and 25 pages is too much to look back through. :)

[BrianG]

The 4600. Motor temps were ok, but the ESC was quite warm, which means overgeared. And I'd like to run the larger 2.2" wheels so that will just heat it up more. The track I was running on requires a lot of quick acceleration because it is kinda tight with jumps right after turns. So, I'm thinking an L size motor would be better for the added torque. I wish Mike has more options for those Lehner basics. I was thinking about using a 1920, but will probably have the same issue as I do with the current setup.

[skellyo]

I can't believe that it was overgeared with a 12T pinion on the 4600. This is on 2S right? Have you thought about swapping the 4600 from your Jato into it to see if it performs the same? I've seen quite a number of people lately on various forums with problematic MM motors. I'd be willing to bet that a better motor would run the truck with ease.

[BrianG]

Truthfully, I'm surprised too. I have a 5700 I could try which would be easier to do. Like you pointed out, the Jato is heavier but runs just as fast with the same exact setup. However, the CRT hooks up much better which would present a heavier load on the system. Still, it's a head scratcher all right. I may look at a 1920, but it's kind of expensive if it's not going to work any better.

Brian, I'm really liking both the 10L and Basic XL 3100. My motor mount, pinion, and other stuff should be here by Friday-Saturday and I should have it going by this weekend. So, I'll let you know how everything runs.(temps and such)

Bye:018:

EDIT - Oh yeah, I'll be running a MM esc too...

[BrianG]

I would bet the Basic XL would be the best bet since it is a better quality motor. I was going to look into one of those, but Mike doesn't carry them anymore apparently.

[jhautz]

Email him. He might have some still sitting around. I dont think they were fast movers for him.

[BrianG]

I think I will at some point.

[pullstarter]

You guys with all your CRT talk, i'm gonna have to get one now!! Oh well what a pity nevermind!! :018:

Hey Brian, I finally got my CRT.5 running! Temps with the 10L geared 20/46 on 3s were as follows: Motor 125f, Lipo 100f, ESC 110f. This was after about 30min of runtime in 85f+ heat. What CD oil are you running? I found that the stock oil was to light. I'm running 80% 50k, 10% 10k, and 10% 120k. It's a little thick (almost wheelies at any speed), I'm thinking of 100% 30k in there...
Also, do you think this is over geared with a Lehner Basic XL 3100?

Differential Ratio: 3.25
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 20
Total Voltage: 11.1
Motor KV: 3100
Tire Diameter (inches): 3.6
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0
Spur/Pinion Ratio: 2.3 : 1
Total Ratio: 7.475 : 1
Tire Circumference (inches): 11.31 inches (287.27mm)
Total Motor Speed: 34410 RPM
Vehicle Speed: 49.3 MPH (79.2km/h)
Effective Speed Rate: 4.44mph/V (7.13kmh/V)
Effective KV Value: 3100

BTW I'll post up a thread on it later today or tomorrow...

Bye:018:

[BrianG]

Those temps are really good for that speed and runtime! I would keep it right where it is. Makes me want to dump the MM motor for an XL basic, or maybe a 1920/7 (but may be a tad too small). I'd really like to go with a Basic XL 4200 or 3600. I guess I'm gonna have to call Mike and beg him to get one. :)

I'm running 50k in the center. It can wheelie but I have enough weight pushed forwards that it's not a real problem unless I really get on it.