This set was sitting on my shelf for a while, but the time has come for some RC upgrades :) First of all I had to swap the original engine with a V8, it was a perfect fit. Installing the 2 buggy motors was not that difficult either. I tried to get the drive from the buggy motors to the fake engine but that didn't work due to some space constraints, so another M motor was added to power the V8. Tested first with one BuWizz unit, but the stress was too high on rough terrain so I added another unit to independently power the 2 buggy motors. This caused some issues with the weight distribution - the car is not easy to navigate as the back is much heavier - but it can start with a moderate wheelie now :)

List of modifications:

- Engine swap

- Body panels adjusted, frame modified to fit the M motor and the Servo, added roll cage to support & protect the BuWizz units

- added front grille

- Added 2 buggy motors, M motor, Servo, PF lights, 2 BuWizz units

Edited September 11, 20177 yr by kbalage

Saw the teaser on Instagram- this is awesome, great job

I was wondering when you would upgrade this set... And you certainly didn't disappoint!

I like that you put a Technic figure in it, those guys are way underused.

Great work, and I can't wait to see what you BuWizz-a-fy next!

Just curious why you used two BuWizz units?  I believe one can support two Buggy motors and M motor.

52 minutes ago, technic_addict said:

Just curious why you used two BuWizz units?  I believe one can support two Buggy motors and M motor.

5 hours ago, kbalage said:

Tested first with one BuWizz unit, but the stress was too high on rough terrain so I added another unit to independently power the 2 buggy motors.

More power!!!

Edited September 7, 20177 yr by mocbuild101

Wow. That is awesome! I upgraded my 42037 with one buggy motor, but I don't have an S-Brick or BuWizz, so the performance was nothing like this. I do like the addition of the V-8 engine, it's a big improvement in appearance.

Thank you everyone for the kind words :)

@mocbuild101 I really like the Technic guys as well, try to involve them in all of my videos :) About the next set to "BuWizz-a-fy" (will put this in my signature probably, love it), there'll be more than one - small scale + big power - pure fun ;)

@technic_addict as it was mentioned I added the second unit because the single BuWizz + 2 buggy motors combination did work only indoors, not on gravel or dirt. When the motors were stressed the protection of the BuWizz unit kicked in. 

@Leonardo da Bricki if you have a second buggy motor you can try with 2 AAA battery boxes. Will be somewhat heavier and you won't get the maximum performace of the motors but worth a try. The IR receivers will probably take the place of the seat though..

@kbalage If I only had two...  You can check out my mod here if you want. And I need to buy one of those as soon as I have the funds... AA battery box is all I have.

7 minutes ago, Leonardo da Bricki said:

@kbalage If I only had two...  You can check out my mod here if you want. And I need to buy one of those as soon as I have the funds... AA battery box is all I have.

I like the colour scheme of your mod, looks cool! Did you manage to take a video of it? It'd be interesting to see the speed difference.

23 minutes ago, kbalage said:

I like the colour scheme of your mod, looks cool! Did you manage to take a video of it? It'd be interesting to see the speed difference.

Thanks! No, I don't have a video. Maybe in the future I could make one. It had ok performance, but it started slow and had to gradually build up speed due to the weight, gear ratio, etc. So it was not what I was hoping for in performance, though I was happy with the appearance of it. It is much slower than yours, that I know for sure. Probably could reach about 2/3 your buggy's speed.

Edited September 7, 20177 yr by Leonardo da Bricki
Curse of Misspelling was cast

Nice mod, but what put me down a bit, is the fact that you needed two buwizz to get it running .

I'm currently using two AA battery cases in the B model of the 42065 with two SBricks and two RC motors and was hoping to replace the two battery boxes and SBricks with a buwizz but as it seems one still seems to struggle if two RC motors get under stress.

How did you geared the RC more toward the wheels? Did you use the inner or the outer RC Shaft hole?

@tamahandy - It runs ok indoors with a single BuWizz if you don't try to start from 0 with 100% acceleration in high mode. I added the second one to be able to run in fast mode on rough terrain and to perform these fast accelerations and stops. There's no gearing, direct drive from the outer (slower) output. I'll post some pictures soon with closer details.

Here are some pictures of the changes and the inner structure:

And some examples of the damage you can see after some moderate offroading - Lego is clearly not made for this:

More images in my blogpost: 

http://racingbrick.com/2017/09/lego-technic-42037-formula-off-roader-rc-mod-detailed-images/