Help what Motor/ESC For XLB

[fuzzy2133]

Ok I can use all the advice you can give.

I want to convert a XTM XLB 1/7 scale buggy to a Brushless system. I need your input on a Brushless Motor and an ESC for this thing.

Thank you to everyone for the help.

[tcolesen]

There are a couple of ways to go about this, the expensive route and the more budget-friendly route. Is there a particular budget that you wish to not exceed?

[fuzzy2133]

lets go budget friendly and then the expensive route. I would like to hear both sides. Thank you.

[tcolesen]

Here's what I think for the cheap route:
-Feigao 540C 9XL ($90)
-BK Warrior 9920 ($200)
-14-16 cells (or 5s Lipo)
A higher turn motor could be used if more cells were to be used.

Expensive route:
-Neu 1515 2.5D ($280)
-Quark Monster Pro 125B ($280) or MGM Compro 160amp 16cell ($265)
-5s Lipo (my guess is minimum 70amps continuous)

Naturally the more expensive route would perform better and run cooler due to increased efficiency, but the cost is almost two times greater.

[glassdoctor]

6s lipo and a big (low kv of course) motor would be really nice with this big vehicle.

So I would go with a controller that can do 6s.

MGM 24/160 and 6s 8000mah maxamps batteries.

Motor choice comes down to budget... the Neu are great, but a Wanderer/Feigao XL would get the job done for a fraction of the cost. You can always upgrade the motor too.

A 10XL (1500kv) would be a good motor on 5-6s.

MGM24/160 + Wanderer 10XL = @$350
Maxamps 6s 8000= @$300
6s 6000= @$200

Edit: Just realised the 24/160 is $100 more than the 16/160 I was thinking of... the 16cell is only good for 5s.

I still like the 6s better but it costs a lot. So.... if $365 is too pricy then I would go with the 125B and 5s lipo and maybe a 9XL instead of the 10XL.

[fuzzy2133]

OK so it is sounding like I should definitely get the MGM 24/160 ESC and the 6s Batteries with at least 6000mah.

Then the motor could be the Neu 1515 2.5d or Feigao 10XL.

will the MGM 24/160 be good for upgrading the motor later if I go with the 10XL?

[glassdoctor]

Yes... The Neu motors are more efficient than the cheap chinese motors so the controller will have no problem working with a Neu.

The Lehners and Plettys are supposed to be efficient as well.

If you go 6s you might want to drop the kv of the motor depending on what kind of running you want. Don't get me wrong... the 2.5D will scream on 6s and might be just what you need. I'm running a 2.5D in my Jammin truggy on 4s and I like it for what I'm doing... racing, not trying to go ballistic. But if I dropped in a 6s pack... wow.

We need to look at the gear ratio and tires that will be used too to get a good idea what to do.

[fuzzy2133]

so maybe start with a 5s pack.

I was thinking of using the stock 2 speed ratios and stock tires.

however if the motor will perform better on a single ratio then I'll switch to a slipper or center diff.

I know the tire diameter is slightly larger than 1/8 buggy (might be the same as 40 series tires) I can get a measurment once I am home tonight.

Diff Ratio = 3.30
1st gear = 4.64
2nd gear = 3.15

Final Drive for 1st = 15.31
Final Drive for 2nd = 10.39

[glassdoctor]

I didn't realize it had a 2 speed. Have you figured out how to fit the pinions to the motor?

The tires are basicly standard maxx size right?

With those ratios I think you are right on with 6s and 1700kv.

My truggy has the same tires basicly, and it does 30mph when geared 13:1 on 4s lipo with the 1700kv motor. So 6s would "in theory" bump it to 45mph which is a nice speed imo. And with your two speed that would mean "in theory" about 35mph/52mph in 1st/2nd in a rough comparison.

Edit: note that I can gear up to go faster (30mph isn't really fast enough for a speed junkie, but it works on the track) and the motor can definitely pull a taller gear no problem. But with your gear ratios I think my 13:1 is a good basis to compare with your XLB. I have geared it at 11.6:1 on the track and I really liked that... it was very impressive and started to make the nitro truggies look silly.

I would use that as a tool to pick what motor you want based on what kind of top speed you want. Personally I wouldn't want a setup any faster than that unless I was jsut out to see how fast I could go. 50mph is really fast and things can go wrong in a hurry....

[fuzzy2133]

I have a sherline lathe and mill so I can modify the clutch bell or make something for the pinion gears.

The tires are a standard max size.

glassdoctor what motor are you running? With the XLB being so big I think I will aim for 30mph and go from there.

[glassdoctor]

I'm running a 1515 2.5D in my Jammin CRT and a 1512 1.5Y in a 777, both on 4s lipos.

30mph will be no problem at all... but it's important to know what will be enough. If you really only want 30, then you have to gear down or pick a slower motor, or just go with 4s lipo. If you ran the same exact setup I have in my truck you would get 30mph... (something like 25mph in 1st and 35-40mph in 2nd) Then you could go with 5-6s for more insane speed.

The XLB has a larger footprint, but it shouldn't be much heavier than a truggy.. and probably lighter than many super-modded emaxx monsters. (some are 14-16 lbs)

My CRT is 11.5 lbs with a 12000mah 4s pack.

[fuzzy2133]

Ok sounds good thanks for all your help and wisdom. I was totally lost and now it is clear.

Fuzzy