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Mugen MBX8 Eco

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Old 06-20-2018, 11:49 AM
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[QUOTE=slackinoff;15248927]
Originally Posted by symmetricon View Post


Well shame on me, I see what you meant. I didn't even think about the hub side.

Rm
No worries dude. The kit setup wasn't horrible, but I'm sure with time the setups will come in and the car will get even better.
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Old 06-22-2018, 04:03 AM
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Hello from Slovenia!
I'm a new member on RC Tech.

Im testing my MBX8 Eco for the past three days. I started with stock setup which was too lose on the back, so I did some changes. Most of the changes are based on MBX7r Eco
which I have been driving for the past three and a half years.
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Old 06-22-2018, 06:57 AM
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Originally Posted by buggyRC View Post
Hello from Slovenia!
I'm a new member on RC Tech.

Im testing my MBX8 Eco for the past three days. I started with stock setup which was too lose on the back, so I did some changes. Most of the changes are based on MBX7r Eco
which I have been driving for the past three and a half years.
Congratulations, what kind of setup changes did you do? I have been testing my new MBX8 Eco since last Sunday, tomorrow will be the kit's first race! I am excited.

Rm
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Old 06-23-2018, 12:31 PM
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I changed shock oil from 550cst to 450cst in the back. Went from 2,7 to 2,6 sway bar, longer camber link, higher roll center on the back tower, moved the battery pack to the rear position, put on 20g heavier wing.
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Old 06-24-2018, 08:43 AM
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My only gripe with this kit is the rear wing stay mount, the plastic piece that holds the 4 nuts for mounting the wing. The plastic is so flimsy that all four of the nuts spun inside the plastic before they are fully snug. I eventually just ditched that piece and just washers and nuts.
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Old 06-25-2018, 10:30 AM
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Has anyone tried to fit the radio tray, motor mount, and battery tray from the MBX8 onto the 7r? I would prefer to have the ability to move the battery further forward if possible. If the newer motor mount works, I would rather have that as the other mounts have been discontinued. Also the radio tray was slightly updated as well.

Thx!
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Old 06-26-2018, 08:24 AM
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Originally Posted by buggyRC View Post
Hello from Slovenia!
I'm a new member on RC Tech.

Im testing my MBX8 Eco for the past three days. I started with stock setup which was too lose on the back, so I did some changes. Most of the changes are based on MBX7r Eco
which I have been driving for the past three and a half years.
what chages did you do to make the rear more stable.

The car has amazing steering and suspension. Just a little squirrelly going on power into the straight.
I know. Itís me and definitely not the car.
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Old 06-26-2018, 09:00 AM
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Originally Posted by RCSteveH View Post


what chages did you do to make the rear more stable.

The car has amazing steering and suspension. Just a little squirrelly going on power into the straight.
I know. Itís me and definitely not the car.
He said he did this.

Originally Posted by buggyRC View Post
I changed shock oil from 550cst to 450cst in the back. Went from 2,7 to 2,6 sway bar, longer camber link, higher roll center on the back tower, moved the battery pack to the rear position, put on 20g heavier wing.
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Old 06-27-2018, 06:48 AM
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I wrote this in another thread but I wanted to share here.


1st race report: The buggy is quiet, very smooth in steering and driveline, and precise. ( My only other experience is with a nitro 8ight, so hard to compare). Kit setup, pro-line calibers when track was damp and loamy, then a switch to aka doubledown as the track became more grooved and polished. I was mucking around checking my ride height noticing something was being difficult ( dramatic change after runs, collar adjustments not doing much ). I first thought it was my shocks getting pumped up or something, but it was actually a bind in the front suspension. The pillow balls became a touch tight, causing some bind. I backed off the caps on the uprights a small amount until the got free again, that fixed it right up. Checking rideheight is an easy way to get a barometer on your car. I did forget to put an upper shock nut on for my first main....so that was a disaster, but it happens. I learned a lot and had a great time.


I have been disassembling the buggy when I have time this week so I can check over everything. This is a pleasure!, what a joy to work on this buggy. The design and fit is so nice, all the bearings fit perfect, yet still come out without a big fuss. I want to check on the diff fluid and see if the initial running produced any "break in" contamination. . I am really enjoying the buggy.

Last edited by slackinoff; 06-28-2018 at 07:42 AM.
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Old 06-27-2018, 01:20 PM
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One question...
How did you guys build diffs? Did you build it as Drake suggests?
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Old 06-27-2018, 04:54 PM
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Originally Posted by buggyRC View Post
One question...
How did you guys build diffs? Did you build it as Drake suggests?
Yes, I'm running 5/7/3 on mine.
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Old 06-28-2018, 12:35 AM
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I was thinking about the shimming.
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Old 06-28-2018, 06:04 AM
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Originally Posted by buggyRC View Post
I was thinking about the shimming.
Well, you didn't specify shimming.

I built my diffs per Drake's video and within that video, followed his recommendation on how to shim.
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Old 06-28-2018, 07:38 AM
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Originally Posted by buggyRC View Post
One question...
How did you guys build diffs? Did you build it as Drake suggests?
I built mine to his video, regarding the shimming of the internal gearset.

Now on the gear housing shimming, I was only able to use one shim when installing the diff into the housing on both the front and rear. Meaning, I put one shim on the ring gear side and none shim on the other side. I think in his video he puts one shim on both sides for a total of two.
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Old 06-28-2018, 07:47 AM
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Continuing on my disassembly and inspection, I found another small bind. This one was in the rear. I tracked it down to one single pill not seating all the way into the hinge pin holder. A bit of flashing was keeping it from seating all the way. This caused the arm to be tight and not be totally free. It was free on first inspection, but taking the shocks off revealed it was not as free as it should be.

I bet the buggy feels way different next time I go out. I have alleviated several binding spots front and rear that were my fault during initial assembly.
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