My take on JK (scx10)

builtrc

Member
Well,

It?s all started when I saw that China JK 2-door body and decided to use it in my build. At that time, I also had another project going with almost similar wheelbase and width, so I decided to make ?2 bodies on 1 chassis build? and use 1/10 MST CFX for both of them.

The concept was the following: front motor, CMS setup, battery at the rear under the body (mounted along the chassis, between frame rails). The JK itself should have been stockish look, with stock fenders and quite narrow wheel track.

At the beginning:
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Chassis:

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At the trail:

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And after that exact trail, stock spur (mod 0.6) decided to lose couple of tooth, so I converted it to trx-4 one (45t 0.8M/32dp)

Stock:
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Traxxas one:
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Also spent some time fabricating some sliders and rear bumper, first brazing experience:


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I liked the looks of the truck, but performance wasn?t as good as I expected. I decided to completely rebuild it. To do it, I took the JK body and my OG Honcho chassis and started to build new version of JK.
 

builtrc

Member
I decided to document the build and gain some new experience, that is why I started filming the progress and upload to Youtube, so I started my own channel:
https://www.youtube.com/channel/UCITctAZbq7F1v4O1_eRAe3w


With scx10 chassis, the concept itself remain almost unchanged.

Front motor mount, full interior, CMS, metal bumpers and sliders, inner cage, stock fenders, battery under the body.

After some minor mock ups, JK should look like this:

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Some chassis pics:

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I don?t have that much photos on that part of build, but have some footage:



More details on chassis itself:



It turned out, that film the build is easier from one side, but takes more time to share with other Rc Builders and Enthusiasts.
 

builtrc

Member
After initial chassis work and body mockup, it was time to do smth with headlights. I wanted to use some 1W LEDs, that requires different approach to lightbuckets and setup itself. I took some lenses, PVC plastic, hobby knife and CA glue..

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As you see, now I have one-piece front grill with headlights, I think its more convenient to use it like this. I can pull it off altogether if I need it.

More details on process:

 

builtrc

Member
As I had "battery under front seats" layout and wanted to have full interior, and didn't want the body to seat too high on chassis, I only had one option available: chop, trim, glue....

I chopped of lower inner seat sides, the center console itself. After it I glued some PVC pieces under handbrake ares, one sides of center console, painted it all, so now I have higher profile console. I also had to trim front part of it a little along with lower part of dashboard.

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And final result looks like this from underneath:

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More explained:

 

builtrc

Member
What's next?
Yes, front bumper. I wanted to fabricate smth that will protect the body in front, also allow good departure angle anw will look appropriate, and will be kinda easy to fabricate.

First was the ideal, then initial mockup. I used some 8 mm steel fuel line from LADA, bent it

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side view

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brazed (sorry for the focus)

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soldered flat piece

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and the result:

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More details explained here:

 

builtrc

Member
One step forward. Went ahead with the rollcage.

I took 3 mm welding electrode to fabricate inner rollcage to support the body.

I wanted the cage to stiffen body a bit, so I bent central piece to go on the bottom of door opening, so the cage use it as a stand.

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At the rear part, I used the same approach,

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As usual, more details in video below. I also filmed how to easely clean up brazed parts from oxides, slag and similar dirt.

 

builtrc

Member
On more thing. I fabricated new version of the front bumper.

I took 6 mm brake line, bent 2 pieces, flattened them a little, also took some sheet metal and soldered to it.

some pics:

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I went for trail with local guys,

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And the new story began....
 

builtrc

Member
Well, After that trail run I had 2 major issues.

First one - front axle went out of order. As I had scx10-2 c-hubs and knuckles on scx10 axle, one of them clocked against the axle housing and bent steering linkage a little ::awwcrap

to fix it, I went ahead with diy axle tubes setup and now it seems that problem is solved, more details in the video:


And yes - scx10-2 universals are plug-and-play for scx10 OG axle if you use scx10-2 c-hubs, knuckles and some axle tubes to reinforce the axle itself.


Second one - truck was awfully backflipping on steep uphills, so I needed to do smth with rear suspension geometry and overall components layout, so I decided to take a common way and rebuild all the chassis :laughing: One may ask, why should I do it? Well, I needed to raise rear upper link front mounting points a little, but battery trays didn't allow me to do it, so battery should be relocated. I had good place near the firewall, under the hood, but there was a tranny..... So one change requires another, and again and again. Any custom builder understands what I'm saying ;)

So I went ahead with tranny under the hood setup:

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And more explained:




 

builtrc

Member
After tranny was relocated, it wasa time to fabricate new servo mount and install it. During that journey, I tried numerous positions and was really jelous to those who just builds stock kits :laugh:

anyway, we are builders so that try-and-error approach will not stop us from our goal of having built custom truck ;)

some pics with servo in place:

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And video guide how I did it:




Also I raised rear upper links at the chassis:



So now we are a couple of steps closer to our target of complete JK.
 

builtrc

Member
Many issues with the chassis were sorted, it was high time to proceed with the body mounts.

For the front, I took piece of sheet metal and bent a bracket, attached it to stock body posts with some screws and to headlight buckets from the sides. from the chassis side, I used the same technic - piece of sheet metal, some screws and here we go - we have finished body mount. More details in the vid:


For the rear part, I just used the old one with some minor adjustments:

 

builtrc

Member
Next step is to place all necessary electronics under the body.
I took piece of 2mm PVC and cut a plate out of it to cover the body underneath, used couple of screws to hold it on chassis.
Then some common stuff: 2 sided tape, some zipties and all necessary components are in place in the front of the chassis.

 

builtrc

Member
Well,
I asked 3 top-tier testers (4yo, 5yo and 6 yo) to perform JK hardcore testrun :) Half an hour and here we go,
I decided to go with new setup for the truck. Previous version wasn't comfortable enough for maintenance purposes:

 

builtrc

Member
After tranny itself was quite ready, I moved to battery and esc positioning. It was the hardest part after tranny placement under the body. More details could be seen in the video:

 

builtrc

Member
When you build custom truck, it's always trial and error route. I had it with battery trays and ESC holder under the hood. It took me good couple of days in workshop to sort it out

First - mockup:


Second - battery plate adjustment


Third - ESC holder



Stay tuned, build is in progress ;)
 

builtrc

Member
Well, it turned out that top link axle mount at the front needs to be fabricated, the old one will not work.

 
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