Picked up a Stampede 4x4!! - Page 7 - RC-Monster Forums

J57ltr · 02.25.2011, 03:00 PM

Quote:

Originally Posted by lincpimp

1x2 should work. I think the vice will go at least 2". What is the 3rd dimension?

I have 1" in like 4' by 8' sheets, and tons of scrap in about the 12" X 12" size. Most of it is UHMW (Think cutting board material), but it should work fine for a jig. It's 1" thick so whatever dims you want I'll make for you. I'll just cut it up on the bandsaw then mill it flat so it's parallel, just let me know.

Jeff

lincpimp · 02.25.2011, 03:29 PM

Quote:

Originally Posted by J57ltr

I have 1" in like 4' by 8' sheets, and tons of scrap in about the 12" X 12" size. Most of it is UHMW (Think cutting board material), but it should work fine for a jig. It's 1" thick so whatever dims you want I'll make for you. I'll just cut it up on the bandsaw then mill it flat so it's parallel, just let me know.

Jeff

Ok, sounds good. I will measure the vice and let you know.

Bondonutz · 02.26.2011, 08:52 PM

Quote:

Originally Posted by lincpimp

OK, just got some parts in.

I have a pretty much off the shelf cvd option here. It does require bearings with a 6mm inner, so either go with a 6x11 as a drop in replacement, or enlarge the hub carrier to fit a 6x12.

Using these parts:

HPI 80853 70mm savvy center driveshaft (made by mip)
Mip 1488 tmaxx axle
Mip 1147 rebuild kit
stock hex drilled to 6mm inner or the tekno 12mm hex for 6mm axle?
stock tmaxx wheel drive pin trimmed slightly or a shorter pin?
revo diff outputs (drop in fit for the stampy diff, with 6mm outputs)
6mm bore drivecups, long length (will need some help identifying these)

So you end up with a seriously stong 1/8 scale size mip rear cvd setup, larger 6x12 bearings and 6mm outputs in the diff.

You are all welcome.

Pics to follow.

Where are these pic's Pimple ?

lincpimp · 03.02.2011, 05:47 PM

Quote:

Originally Posted by Bondonutz

Where are these pic's Pimple ?

Bite me. On second thought, keep your hands to yourself!!!

I will get some pics up when I have something pic worthy.

So I did try to open up the stock carrier with the 12mm end mill. Not easy to do without a mill, and some sort of contraption to hold the carrier.

So I ordered a set of the tekno rear hubs, cost about 10 bucks shipped. I got the .5 deg models as I really do not like alot of fixed toe in on my basher rides. I would rather they go a bit faster than turn in super tight.

The tekno carrier is big, beefy and looks really stout. Very well made part. It uses a 6x12x4 outer bearing, and a 15x10x4 inner bearing. Outer bearing size is just what we wnat to use the 6mm tmaxx axles. The inner bearing is too big, but it can be replaced with an off the shelf 6x15x5 bearing.

I did not order the bearings, as I was not sure if the maxx axle would be long enough with the 6x15x5 bearing installed, as it is 1mm longer than the bearing tekno specs. I did some measuring and we are good to go with the 6x15x5 bearing.

The tekno hub is about 12.75mm thick at the bearing area, measured from the face of the front bearing to the back of the carrier, imagine the same plane the axle rides in. Since the inner bearing is recessed into the carrier with the tekno spec-ed bearing you get about 11mm from 1 bearing face to the other. With the thicker 6x15x5 bearing in there we are looking at around 12mm. The tmaxx axle is a bit longer than that from the cvd area to the pin hole. So it looks like 1 traxxas 6mm id teflon washer will take up the slack. Perfect.

I will order the 6x15x5 bearings and some 6mm id washers.

This will increase bearing life and load holding alot, as the bearings are much bigger than the stock 5x11 turds. Traxxas really needed to step up to 6mm axles and larger sliders, the old rusty/pede stuff is way overtaxed in a heavier vehicle like this.

So total cost so far:

hpi cvd shafts $2 for a pair (super ebay sale)
tmaxx axles $8 for a pair
mip cvd parts (free)
tekno .5 deg rear hubs $10
long drive cups (free)
6x12x4 bearings (free)
6x15x5 bearis (tbd)
revo 6mm diff outputs (free)
assorted hardware (free)

So I have about 20 bucks in this, if you do not count the endmill ($7) and my time (priceless).

And I will end up with some super sturdy cvds/axles! Much bigger cvd joints and thicker shafts than the tekno or others. Hell, this stuff works on maxx and savvy trucks, should last forever on a pede 4x4, which likely weighs 4lbs less.

I will say that the front driveshafts have not worn at all. (only had about 3 packs thru it) I will leave them in untill they crap out and see if my rear solution will work in the front. I will buy the tekno hubs as it makes fitting bearings alot easier with limited machine tools.

lincpimp · 03.02.2011, 06:08 PM

Ok, went with these bearings: http://www.avidrc.com/product/8/metr...-bearings.html

Little less than 2 bucks each shipped, when I bought 4. So I am up to 24 bucks for this mod. If starting from scratch and buying everything you may get close to the cost of the tekno kit at 50-55 bucks, but this has to be stronger.

lincpimp · 03.02.2011, 11:45 PM

Ok, so no one cares... I guess the lack of pictures turned everyone off.

So I will pose a cvd ?:

Would like to get some other cvd options. What other mfgs make or made a maxx cvd to fit the old 2.5?

Also, if anyone is aware of a 7-74mm cvd bone let me know. It would be nice if the mfg also made a maxx cvd, but not a requirement.

I also considered drilling a new pin hole in the lst axle so I could use it w/o the spacer. But they have hardened this axle, and I doubt it would be easy.I could grind flats and use a setscrew reatined hex. Not sure if those exist as I would like to use them. Maybe someone knows of a 12mm hex that is thick and made of steel or al?

03.02.2011, 11:58 PM

Sorry, I went with Tekno's so my interest in them has twindled. I will say this, you might want to get started on some front shafts. I totally snapped a stocker off, and I know you have more torque, then mine.

lincpimp · 03.03.2011, 12:01 AM

Quote:

Originally Posted by asheck

Sorry, I went with Tekno's so my interest in them has twindled. I will say this, you might want to get started on some front shafts. I totally snapped a stocker off, and I know you have more torque, then mine.

Yeah, you are right. I am thinking some tekno ft hubs, and the bearings are coming that will fit those as well as the rears. Might give the modded lst shafts a try, as the front will see less load than the rears, and I would like to use the pede wheels I have, which means the electric 2wd rears will end up on the front of the 4x4.

I will also be working on a setup for the 2wd pede. I have a big 7th scale 2wd pede based buggy thaty I run a 9l feigao on 3s. It eats driveshafts for lunch.

J57ltr · 03.03.2011, 12:07 AM

Sorry I wasn't able to get by and drop off the material, I'll send it when I get back. We ran into some major problems on the customers part today and didn't get out of there till 8 tonight. and we are driving back to H'town in the afternoon.

Jeff

_paralyzed_ · 03.03.2011, 12:17 AM

Hey pimple- I'm pretty sure I have a pack of 4 12mm hexes with a set screw. PM me if you want them.

Have you even looked at this? (look) http://www.fastlanemachine.net/prodd...LM26333&cat=31

lincpimp · 03.03.2011, 12:26 AM

Quote:

Originally Posted by J57ltr

Sorry I wasn't able to get by and drop off the material, I'll send it when I get back. We ran into some major problems on the customers part today and didn't get out of there till 8 tonight. and we are driving back to H'town in the afternoon.

Jeff

No prob Jeff, I had a rough day as well. Just let me know what I will owe ya for shipping. Had a good time when we were chatting, we will have to catch up someday.

Quote:

Originally Posted by _paralyzed_

Hey pimple- I'm pretty sure I have a pack of 4 12mm hexes with a set screw. PM me if you want them.

Have you even looked at this? (look) http://www.fastlanemachine.net/prodd...LM26333&cat=31

I did see that, but I did not really have any isses with the axle, I was ripping the inner plastic axle piece that attaches to the diff outputs.

I just picked up a set of the tekno 12mm hexes and some more m6 hubs to play with the front of this truck and the rear of the 2wd pede.

I was just drilling out the srock plastic 12mm hexes. Seemed to work fine.

lincpimp · 03.04.2011, 12:32 PM

Here are some pics of the tekno carrier vs the stocker:

Waiting on inner bearings and this project should be done. About time, huh...

Bondonutz · 03.04.2011, 01:17 PM

WOW, hadn't realized how Deisel the Tekno carriers were !
I will be buying a set for my Stampy rather than mucking with the PE parts or trying somthing else..

lincpimp · 03.04.2011, 02:31 PM

Quote:

Originally Posted by Bondonutz

WOW, hadn't realized how Deisel the Tekno carriers were !
I will be buying a set for my Stampy rather than mucking with the PE parts or trying somthing else..

I was very impressed. After seeing them I decided they were a much better idea than fooling with the stock carriers. I figured a few comparison pics would help others decide!

lincpimp · 03.06.2011, 02:51 PM

Here are a few pics with everything installed.

The 6x15x5 bearings fit the carrier perfectly and require 3 of the the traxxas 6mm id teflon washers to space the tmaxx axle. I put 2 on the inside of the axle and 1 on the outside.

The hpi dogbone and long cvd cup work, would be nice to have a 73-74mm long shaft and use a med length cup but this is the best I can do with off the shelf parts.

Will get the other side done and post up some results.