BL Xray M18!!! - RC-Monster Forums

lutach · **BL Xray M18!!! -** 09.22.2007, 08:05 PM

Hi all,

I'm having a little trouble with my M18's ball diff. I can't seem to set it to the right spot. I have a front one-way, Mamba 8K motor. The problem is when I apply some throttle it spins or swerves to one side. I'm trying to get it to work to try my new ESC that just rocks. This little ESC can handle up to 6S lipos or 7S A123 (or equivalent 3.6V cells) and it has an option for it too. This ESC seems to have the same MPU that the CC MM uses, but it has options for different timings. I will also test it with my Mini-LST after I get my ball diffs as I'm tired of buying and fixing my viscous. If anyone can lend a hand on how to set the Xray M18 ball diff, please let me know.

Regards.

09.22.2007, 10:32 PM

let me guess, is swerves to the right?

lutach · 09.22.2007, 10:40 PM

It was actually swerving to the right at first. I did some adjusting and now it swerves to the left.

VintageMA · 09.22.2007, 11:37 PM

I had that problem as well. Don't have the M18 anymore, but if you go to the xray forums they might be able to help you better.

lincpimp · 09.23.2007, 01:17 AM

Lutach, what is happening to the viscous diffs? Are you stripping the ring and pinion or the spiders? I fixed the spider issues in mine and good shimming helped the ring and pinion. A lossely set center ball diff, like the mip will help the diffs last lonnger. I had TLT wheels and tires on my mlst and I think that they had a hand in killing my diffs!

lutach · 09.23.2007, 09:23 AM

Quote:

Originally Posted by lincpimp

Lutach, what is happening to the viscous diffs? Are you stripping the ring and pinion or the spiders? I fixed the spider issues in mine and good shimming helped the ring and pinion. A lossely set center ball diff, like the mip will help the diffs last lonnger. I had TLT wheels and tires on my mlst and I think that they had a hand in killing my diffs!

The first set I stripped the ring and pinion and I had it shimmed. Now the second set the internal gears seems to be all garbage. The plastic is too soft. I'll try the ball diffs to see how they act. I think I got my M18 dialed again. I tried 6S lipos to see if the ESC could take it and it did. This ESC is just amazing. I might work on a mini to set a speed record.

tashpop · 09.23.2007, 12:52 PM

what esc are you using? i see you hyping it up, but no mention as to what it is. also 7cell a123 wow, thats bigger than your truck.

when i had the issues your having with my 18th, i had to tighten my diffs up. problem is its unloading more power to one side. next problem you'll have is reduced turning ability with tighter diffs, and they seem to strip out quicker when tightened down.

lutach · 09.23.2007, 01:52 PM

Quote:

Originally Posted by tashpop

what esc are you using? i see you hyping it up, but no mention as to what it is. also 7cell a123 wow, thats bigger than your truck.

when i had the issues your having with my 18th, i had to tighten my diffs up. problem is its unloading more power to one side. next problem you'll have is reduced turning ability with tighter diffs, and they seem to strip out quicker when tightened down.

I'm not hyping the ESC. Here are some picture. I might have the diff set up right.

lutach · 09.23.2007, 01:53 PM

More pictures.

lutach · 09.23.2007, 01:55 PM

Instructions pictures.

lutach · 09.23.2007, 01:56 PM

Some more LOL.

Thomas P · 09.24.2007, 06:58 AM

The composiste STOCK balldifs for the M18T is bulletproof if you take care ofthem, neer ever stripped out a diff like that, after 6 Xray cars, and only thoose diff+ org CVDs...Glue the "D" rings on he plastic outputs. shimm it well, not to tight,not to loose..then ya go!

lincpimp · 09.24.2007, 09:56 AM

Not try to step on anyones toes, but the stock 18t diffs will not stand up to high rpm use. If the truck lets one tire go and thre diff heats up, the stock plastic will melt. I found installing the steel diff outdrives cured this problem, as stell does not melt easily

Thomas P · 09.24.2007, 01:18 PM

They handled my 8000x11.1 and 14.8x8000. :) Havnt melted my diffs yet, but you are right about it, they will propably melt, but havnt that kind of problem. :)

VintageMA · 09.24.2007, 01:53 PM

Geeeze - I'm only running 2S with my LMT 1015 (6667kv) in my M18T with either a 12 or 14t pinion (not sure which right now) and it is screaming. I've been wanting to put my 3S TP 1320mAh pack in there, but I am scared.

BTW - a 8000kv motor with 4S would spin at 118,400 rpm. Castle rates them up to 80k rpm. I don't think you would even max out the speed on that without the motor literally destroying itself from the centripital forces on the internal magnets.

also - taking a closer look at those pics lutach it looks like those are 2/3A cells, not A123 - big difference.