My Bl Mbx4
 

Hi guys

I just ran my BL mbx4 for the first time OMG:L: it's fast. I'm using a 9L on 12 matched gp 3300's 1.79's for voltage. The gear is a 46t spur and a 14 pinion with buggy tires. The pinion is regular steel it's already showing wear. The motor felt warm but okay the speedo was a little hotter than i like . My temp gun said speedo temp was 180 but my temp gun was off by 20 degress compaired to a excergin temp gun ( best temp gun you can buy). So it's acctually around 160. I think the gear is wrong any ideas ?.

good to hear you have it running. (and too bad it's not easy for you to post pics)

Hmm, controller was warm, but motor wasn't....do you have a smaller pinion??

(on my buggy, 9L on 14 cells, I thought about 51/10. But this may already be on the hot side)


I hope you can get it to run reliable. Just don't burn the ESC!
I thought about putting the smaller (slower) Lehner Basic XL 2400 in my buggy, but forgot to order a pinion.

BTW, I'm expecting my MBX5 any day now. Fingers are crossed.

Daf you would be proud :p this thing is fast . I'm using a sacrifisal pinion the smallest i have to spare is a 14t. I have a 12 but its on my DVO:D . Mike is going to case harden a pinion for me, he said i'll be the ginnie pig:eek: . He said the smallest he has in stock is a 14 . (What size do you suggest ?.) I wish we lived closer i would bring it over so you could drive it :L: .

Okay, I see.

What motor and spur is on the DVO again (sorry for not remembering all details :o ) It's a 51/12 on a 9L, right?

We're talking about Mod1, right?? I would try a 10t, if Mike can get one.

Ja man, if we lived closer together... imagine this.

My buggy has a 9L on 12 cells, 46t spur & 14 pinion speedo kinda hot.

My DVO is perfect 9L on 14 cells 51 spur & 12 t pinion great temps no problem at all.

Just did some math. Your buggy needs a smaller pinion, IMO.

I hope some other guys will post their opinion too.

Yes, smaller pinion, that's what i thought when i read thru this post!!

get a 10.. Mike has got them or can get them. the spur is plastic right?

Nah, the spur is steel, I guess. (that's why he's trying to case-harden the pinion)

If gearing becomes a problem, you can also "magic" an Ofna spur to a mugen center diff. (The 51t plastic) Same as Starscream did to his center diff.

No i'm using the mugen spur its metal. Mike is going to case harden a pinion for me to try.

Yeah, i would get a 51 tooth plastic spur.. The 10T pinion is not too good for a metal spur. Have you got room for this spur? perhaps some spacers are needed.. But try a 12T first.


One hint;

the gears on the traxxas emaxx input shaft (smallest is 13T) are hardened. perhaps you could test one of those. (it has a 5mm hole, only needs to be tappered. The diffs you're using, are they 43/13?

I have room for the ofna diff , but i would rather use the mugen diff if i can. Unless i can get the ofna diff to fit the mugen diff mounts .

You can keep the Mugen diff. You just have to grow a little disc, where you can attach the ofna spur. Kinda like a lid for the cup.

Put some spacers under the diff mount, and you're set.

I have adapted the HB diff to a plastic(delrin) spur gear by making a brass insert for the diff cup. Then, the spur gear goes over the cup and insert and it works like a charm. I could make an adapter for the Mugen diff quite easily as well, if I had one to size up(would take a little time, but not too hard to do). The 14 tooth will be less than ideal, while the 10-12 would work much better. The 12 pinion with a 51 spur would be quite nice, actually.

Hey Hippie, LMK when your going out to lake park sometime, we can run the electric 1/8ths.

I too run Bl 1/8 buggy..
 

I run a hacker master compettion esc with a feiago 9xl geared at 51t/14 and a small fan on esc. run 10minutes on full throttle . with macth 3300 12 cells. It's cool pretty fast..
my 1/8 buggy is a kyosho mp6 international.