mbx5r - next project

[Semi Pro]

just get some 500k diff lock, is should only set you back $5

Originally Posted by Semi Pro

just get some 500k diff lock, is should only set you back $5

That is what is in there.. it is not holding.

from page 1:

Originally Posted by DickyT

I took a few test runs tonight and rebuild the CD 4 times. I started with 10k and I have 500k in there now and it still unloads to the front when I get on it hard. hmmmm.

[skellyo]

I'm not sure why you're having a problem with it. Your center diff may have some issues if it unloads with 500k in it.

The diff is in good shape, the gears are solid, not worn, it spins very smoothly, no gaps or grinding. I have a feeling it is a combination of my heavy finger and the massive torque of the 1515. I wish I had a 1512 or medusa 60mm can to try.

The engineers at my job have some rubber putty stuff that we will fill it with tomorrow should the saran wrap idea to bind it not work.

[skellyo]

Before putting something non-removable in the diff, I'd head to the thread on rctech about 1/8th conversions and ask there. I know some of those guys have run 1515's in buggies and I don't think they're unloading that badly.

http://www.rctech.net/forum/electric...sion-kits.html

I would never put anything non removable in. This putty goo stuff the engineers have is rubber. it could be cut back out :) I'll check that out though thx.

It looks like Kyosho Center Differential Assembly MP-777 p/n IF344 will fit, that will give me the quieter plastic spur!

I will check my LHS for it after work. I'll take the muggin with me to verify sizes.. I have to rip the MM out anyway since my v3 showed up today.

[BrianG]

Huh? 500k not enough? I have 100k and the front end wants to come up. Any thicker and wheelies will become a problem I would think.

Might be better off getting a spool...

Looks good. Glad it finally came. Now all we need is a little video footage

I stopped by Toy's r Us, got silly putty, and the lhs that carries kyosho and mugen. I picked up stiffer springs front and rear, a kyosho mp 777 center diff which is a direct fit, and a jconcepts illusion body. Mike was out of plastic spurs so I ordered the plastic kyosho spurs from amain. By next weekend it will be silent! and not as HoovHartid described sound like it's dragging chains down the road. Time to get wrenching!

[macr0w]

I run 10k in the center on mine and it works great.

[lincpimp]

Originally Posted by DickyT

I stopped by Toy's r Us, got silly putty, and the lhs that carries kyosho and mugen. I picked up stiffer springs front and rear, a kyosho mp 777 center diff which is a direct fit, and a jconcepts illusion body. Mike was out of plastic spurs so I ordered the plastic kyosho spurs from amain. By next weekend it will be silent! and not as HoovHartid described sound like it's dragging chains down the road. Time to get wrenching!

I hate the sound of steel on steel gears... I run plastic spurs on everything, and do not have any issues...

[MetalMan]

My SH Z-Car is somehow as quiet or quieter using its stock steel spur with a Robinson pinion than a Kyosho spur on the same pinion.

I agree with others, if your front end is unloading with 500k something is wrong. Perhaps the company that makes the oil measures it differently? I have seen some brands will multiply their # by 10, so 1000wt. they say is 10000wt. If that's the case you would have 50k, which should still be pretty stiff for a buggy. I dunno.

My truggy is running 30k in the center, and likes to wheelie.

the 500k is ofna and very thick. idk. I have silly putty in there now :) It feels as it will hold just fine :)

Last night I got the MMM put in, swaped the springs and shock oil, silly puttied the CD, found out the kyosho diff needs .5 mm more clearance in the mounts (I'll work on this later). It drives MUCH better!

I still need to change the front and rear diff fluids, according to the setup sheet that came with the buggy it has 5k front and 2k rear. I want to put 7k front and 5k rear.

I also need to move the battery tray just a bit further forward, and find some rx box to squeeze in behind it, clean up the wires and paint the new body! I'll take more pictures when I get the rx box figured out :)

edit: I brought it to work today, I just came in from a run outside. it wheelies on surfaces with traction. none in the dirt or grass, but on coarse asphalt it pulls the front end right up if I peg it hard. anything less than just pegging it and it digs in and accelerates like a rocket.