MCD XR5 BRUSHLESS MODS: Or i should name it NO SPACE FOR MORE HOLES thread..

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Tony78

Tony78

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Hi everyone, first thread here but I 've been in the rc hobby for more than 40 years, starting with tamiya electric kits in th 90's, following with combustion engines in 1/10, racing in 1/8 onroads , following with small 1/28 miniz and 1/18 Hpi micro rs4, then 1/10 and 1/10 formula, rc crawlers etc.. my first 1/5 scale was RS5 Modellsport Touring full carbon fiber chasis with the petrol 25cc engine, but my passion with electric rc cars made me want to modify it to brushless motor( this was like 15 years ago) and in that time almost no one selling brushless convertion kits, so after all this years finally i found a perfect car for brushless conversion.
One of my first observation about the MCD XR5 brushless conversion kit is that the weight distribution isnt that right( i can undertand that the main design was always based for the petrol engines) but after long nights of researchs i cold figured out in my mind how to relocate the brushless motor and the batteries for better weight distribution..( i couldnt find anything on google but searching and looking videos on youutube one french guy comment about turning the engine forward and relocate the center diff..) so at the beginning, relocating the center diff means shorter front and rear center shafts, means maybe using the short chasis center shafts will works, but at the end, luckily the ones from the car works perfectly.
Second observation: motor mounts. Both engine mounts that come with the brushless conversion kit had to be modified.. also designed/relocated the new battery holders, servo tray, receiver comparment everything had to be modify, I also redesign a battery connector box where I relocated/hided all the wirings to keep it clean and no loose wires around... for the hydrax brakes i kept the original mounts( yes, i didnt modify it:LOL:) but printed some brackets to re-route the hidraulic lines(never liked the zip ties from factory) and etc.. so after long nights drawing and testing templates, it was time to begin the challenge, start drilling some holes(I honesty lost the count on how many HOLES i had to made to finish this project) ... so i didnt take pictures at the beginning, but the next picture made me think that maybe I have serius TOC problems...IMG_E0682.webp
 
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I like this a lot.

I had toyed with doing a similar thing to my XR5-Max, but every time I sat down to start doing the match, I would get distracted or decide to drive the car instead. The stock layout isn't actually that bad when driving, but you are correct that it seems like an electric motor crammed into a gas chassis instead of a ground-up electric design (which quick frankly is bang on correct).

I would be curious to see before and after weight distribution numbers, but that's probably not really realistic.

Are those the new MCD fenders/wheel wells that the MCD Australia guys came up with?

The car looks great... I'll be watching this one for sure!
 
Tony78 said:
By the way, i would love to see more electrics conversions, so don't be shy and post some of your conversions! :cool:
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@Tony78 .. your car looks sick.!! I did think the same thing, reposition everything but I've left mine as is for now, still work in progress..
All I've done so far is lower the esc position by cutting the box down by a third and the esc is screwed in place with a metal mount I made.

I'm also interested in those inner fenders..??

IMG_5079.webp
 
Hi guys, a new member here… Had to register as this seemed to be the place where the cool 5th scale guys hang out at.

I have an electric XR5 and @Tony78 ’s cool project here is what I would do with mine if I was actually able to do this sort of things without risking serious bodily injury or worse; alas, I am not, so I won’t. For something a bit more realistic for myself, I think placing the front-most battery where the servo battery box is on the rear-right, and the ESC in front of the motor hugging the centerline, would go ways towards remedying the balance issue. However, it seems not many share my vision, as I cannot find files for printing a battery tray for the rear-right location? There are at least a few for placing the esc where I’d like to place it, but it’s no good as long as that position is occupied by the standard battery tray.

MCD Australia’s inner fenders are apparently very good, and available also for the shorty chassis, so I’m tempted… The design on Cults3D only works with Max, or so I’ve been led to believe.
 
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