ZZMT Dually.

honda_s2000 · Post by **honda_s2000** » Mon Jan 22, 2007 9:54 pm

Hi all,

Well, thanks to a trade with ynad, I had a fresh ZZMT to start with on this project!

Thanks man.

Anyway, so it started as a stock MT, still in packaging...

About 10 mins after driving it just wasn't right leaving it stock...

So from an idea on http://www.gcrossett.com/zipzaps I decided to do dually wheels! I'm not going to make some big fenders, just because they would have to be way too wide.

So, I added a peice of brass rod to the stock axle, then basically just slipped the wheels on, and bonded them with a drop of CA glue.

Giving me this...

Dually baby!

Got track width ?

I don't know where I'm going with this one.. trailer pulling rig ? or maybe a weight puller... or possibly just a basher to kick up dirt.

honda_s2000 · Post by **honda_s2000** » Tue Jan 23, 2007 1:29 am

Allright... it just wasn't happening for me speed/power wise... so there's only one thing to sort that out...
Tri-cell baby!

And with my new soldering station, it was an absolute breeze, definatly my cleanest mod yet! I lost no screws, fucked nothing up, and it works!

Here's a couple of pics...

Wired up...

Installed....

You wouldn't even know it was a tri-cell.....

Until you open er' up!

Video soon.

So now it pulls wheelies from a standstill, it's time to weight the front wheels a little.

I'm not going to use a wheelie bar, because I'm using it more offroad bashing, so I don't want to hinder ground clearance in any way that's avoidable.

honda_s2000 · Post by **honda_s2000** » Tue Jan 23, 2007 3:34 am

Here's some video for ya'

[YouTube]http://www.youtube.com/watch?v=1vLZMcl8L48[/YouTube]

betty.k · Post by **betty.k** » Tue Jan 23, 2007 4:40 am

hehe, pussy action!

looks like a beast, gotta love it!

DarkTari · Post by **DarkTari** » Tue Jan 23, 2007 10:04 am

Now let's se ya fabricate some fenders to cover dem Billy's

Great work Pimp !

ynad · Post by **ynad** » Tue Jan 23, 2007 11:43 am

Cool

finaly those parts got new home and good use.
Mod on.

Maxximum Attack · Post by **Maxximum Attack** » Tue Jan 23, 2007 5:25 pm

pussy action

That thing is super clean Honda, great job

honda_s2000 · Post by **honda_s2000** » Tue Jan 23, 2007 8:28 pm

Wow, thanks for the comments guys...

Well, I had a late night last night, watching some of RRB's newer videos...and really wanted to get stuck in modding my MT into a crawler....but I held out until the morning, hoping I'd start on a fresh head and make a cleaner crawler than my others.

Well, here's the result...you decide...

Tri-cell
Extended Wheelbase
Tamiya mini4wd Tires.
ZZSE servo gearbox, motor unknown, torque'y though.
Time and effort.

I'm so glad I took my time on building this, and didn't just hack the shit out of it as per usual, I learnt allot by this build, one of the most important lesson's I've learnt...is that I MUST build another!

Seriously, though... there's zero slop, no gear slipping, nothing, the drive- shaft is brass hex, also from a mini4wd, sleeved in some brass tubing, perfect fit.

I might get some video of her in action soon, I'm pretty proud of this build, if you can't tell!

redrustbucket · Post by **redrustbucket** » Tue Jan 23, 2007 10:59 pm

That's the shit!! Mini 4wd tires huh? I gotta have some of those.

guerd87 · Post by **guerd87** » Tue Jan 23, 2007 11:07 pm

definatly the cleanest yet! thats whati was hopeing for on mine, being only the 2nd crawler ive built though there was still a few things i messed up, im trying to score another one and make it top shit though

good work on t extended wheelbase, looks similar to mine, offset tyres help a shit load too!

John

honda_s2000 · Post by **honda_s2000** » Wed Jan 24, 2007 1:14 am

Thanks guys, I'm getting pissed off at the fact that the SE box is too slow, so I'm working on a new gearbox, the rear end is shaved up a little, so it wont look quite as clean from behind, but it'll still be good. Hoping to get that little bit more speed, at the moment, I'm finding there's too much low end torque, so there's much too less traction.... I'll work it out.

betty.k · Post by **betty.k** » Wed Jan 24, 2007 4:47 am

those tyres are a nice find!

hue35 · Post by **hue35** » Wed Jan 24, 2007 10:28 am

Nice work, dude... it's super clean. Nice style, too. What are you gonna do for a shell?

A crawler is still at the top of my "shit I want to build" list, but I just haven't had the time. You've inspired me, though... I gotta get it done.

honda_s2000 · Post by **honda_s2000** » Wed Jan 24, 2007 3:24 pm

Wow, thanks for the compliments

The tires are very nice and soft, and the Mini4wd kits are only about $10US, and there's some worthy gears/parts in there, too.

As for a shell, that's kinda pending, I'm not sure what way I'm going to go, I've got this idea in my head of making a fully caged up crawler, but I need to get fully shot on my idea first of all.

OK, well a little update,. I've added 2 springs in-between the gap in the chassis, this has prevented the torque roll I've been getting by a fair amount, yet still giving me a great amount of flex. I've also ditched the SE servo, and am now using a servo gearbox from a RS Vette, modified to be powered by a red ZZMT motor.... not much speed difference, but at least half as quiet, because the noise of the SE servo can get very annoying fast. Oh and lastly I tried to weight the wheels, but it was awkward due to the way these tires fit, so I melted down the metre of fine solder I was going to use in each wheel, into a big blob, and sat it up front.

You can see the new gearbox here....

Here's the spring setup

Flex, and the weight.

redrustbucket · Post by **redrustbucket** » Wed Jan 24, 2007 10:14 pm

From the pic it looks like you could hack off the exposed inner lip on the wheels which would allow you to drop the gearbox lower. You could eliminate the stock transfer gear and run the gearbox direct to the final drive gear on the axle. Would give you more speed and still plenty of torque.

I ran mine this way with a se gearbox and it worked well. I had some issues with the pinion on the gearbox slipping once it had worn quite a
bit though.

Weighting the inside of the wheels will make it more stable by moving the weight outboard and slightly lower. If the wire solder won't fit inside the wheels you could try melting drops of solder into a cup of water to make tiny BBs and use those inside the tires for an even lower cog. BBs in the tire would also shift the cog rearward on steep climbs though. From the pics the tires look solid inside tho so that might not work.

Looks like you got the spring rate figured out pretty good to balance the torque twist vs. flex. This is always a struggle on my crawlers. What are those springs off of?

Your crawler is improving daily it looks like. Nice work.