Yellowdatsuns mid-motor conversion, on the cheap!

General discussion, builds/restorations, etc...

Moderators: scr8p, klavy69

User avatar
yellowdatsun
Approved Member
Posts: 844
Joined: Mon Jul 20, 2015 1:15 pm
Location: Phx, AZ

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by yellowdatsun »

There's almost no flex, I tried bending and twisting it. There's about 1 inch in the center where there's no support rod, but it seems to be fine. I'm taking it to the track tonight, we'll see what happens!

If this experiment fails, I'll go back to an aluminum chassis, because that really was great. I have a tig welder, but welding up holes on a thin RC10 chassis would be difficult.

Image

User avatar
yellowdatsun
Approved Member
Posts: 844
Joined: Mon Jul 20, 2015 1:15 pm
Location: Phx, AZ

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by yellowdatsun »

Well, at the track the motor and GT tranny worked awesome. The GT tranny is quieter than my stealth. Makes me wonder why more people don't use the GT tranny. I got lucky and the gearing is nearly perfect. So close that I won't be changing it at the moment. I believe it's 84/25. The steering was all over the place though, I need to back off the drive and speed, and try it again.

On the plus side, nothing broke! The chassis took a couple of nasty hits, and is fine.

I also got a new Hobbywing esc last night, because the Castle one was just too big and hanging off the side of the chassis a bit.

I plan on hitting the track again today, to test the steering and new esc.

User avatar
yellowdatsun
Approved Member
Posts: 844
Joined: Mon Jul 20, 2015 1:15 pm
Location: Phx, AZ

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by yellowdatsun »

The new esc and steering changes REALLY woke this car up. I haven't been able to get the braking dialed yet, but man, this thing really goes around the track. Easily as good as my B4.2 was, and getting close to my B5M. The long suspension arms really soak up the bumps, I can see them working from up in the 2nd story drivers stand.

What I thought was a broken transmission,was actually the head of the diff bolt breaking off. Luckily I was able to fix that without taking it all apart. That was the only casualty today.

User avatar
yellowdatsun
Approved Member
Posts: 844
Joined: Mon Jul 20, 2015 1:15 pm
Location: Phx, AZ

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by yellowdatsun »

On my previous RC10T buggy build, and on this one, I've had issues with the larger bellcrank. So I took some of the left over G10 and made myself what I had been trying to find. It may not be perfect, but it works fine, and does exactly what I want.

Image


In the right of the pic you can see a Robinson racing gear tag. I found a metal GT diff gear in a box of "old" parts at my local hobby shop. I may build a second tranny for this car, since I also found a GT tranny case set in that same box. Always nice to have a spare transmission.

User avatar
yellowdatsun
Approved Member
Posts: 844
Joined: Mon Jul 20, 2015 1:15 pm
Location: Phx, AZ

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by yellowdatsun »

I didn't notice this until right now, days after the car was run at the track............

but I didn't have any issues with traction-rolling in corners. This is usually a huge issue at this high grip moist clay track. The car wasn't run for too terribly long, but still, even my B5M has issues with it.



Image

User avatar
yellowdatsun
Approved Member
Posts: 844
Joined: Mon Jul 20, 2015 1:15 pm
Location: Phx, AZ

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by yellowdatsun »

Made new nose supports out of leftover fiberglass. Looks way better than the previous Traxxas turnbuckles, works better, and fits better.

Image

Image

So on monday evening I ran it at the track. My best lap with my B5M is 29.5 seconds, and I ran a 31.5 with this, and the track was not in the best shape (too wet clay, makes for a slippery track). Curious to see if I can equal the B5M's time when the track is better, and I have more time on the car.

The track got worse as the evening wore on, they just kept watering it too often. As a result we all kept breaking parts. The nose on this car got bent, a few times, one of the nose braces pulled out a screw where it connects to the G10 chassis.

On fault of my own, I realized I had the wrong diff lube in the car, and it slipped, a lot. Making my best time even more surprising. I pulled the tranny apart, cleaned the diff parts, installed a Robinson metal diff gear that I had, and re-assembled it all.

I also removed the 10T bumper, and added an nos RPM car style bumper, which should help keep the nose in better shape from impacts. The 10T bumper was acting as leverage and tweaking the aluminum badly. I need to find a new/old aluminum nose for the car, but the ebay ones are too pricey.

Image



I'll be going back again after work today, we'll see how she does.

User avatar
jwscab
Super Member
Posts: 6479
Joined: Wed Jan 28, 2009 9:42 am
Location: Chalfont, PA
Has thanked: 10 times
Been thanked: 434 times

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by jwscab »

so you are using truck arms all the way around? Wouldn't that make the car pretty wide?

User avatar
yellowdatsun
Approved Member
Posts: 844
Joined: Mon Jul 20, 2015 1:15 pm
Location: Phx, AZ

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by yellowdatsun »

jwscab wrote:so you are using truck arms all the way around? Wouldn't that make the car pretty wide?
It started as an RC10T, with a buggy body, so yep, long arms all around. It does make the car a bit wide, but the flat faced wheels help bring it in a bit. Not nearly as wide as an RC10T with the truck wheels/tires.

Jimbo302
Approved Member
Posts: 355
Joined: Sun May 15, 2016 6:05 pm
Location: Micronesia
Has thanked: 14 times
Been thanked: 5 times

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by Jimbo302 »

I really dig this. Keep it up , man.

User avatar
yellowdatsun
Approved Member
Posts: 844
Joined: Mon Jul 20, 2015 1:15 pm
Location: Phx, AZ

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by yellowdatsun »

Took some blue aluminum nose brace mounts from another car I had, and put the on here. Also ordered a set of blue aluminum bellcranks, and installed them. These have no servo saver on them, which is something I've wanted for a while, hence the hokey bellcranks I had cut out myself. These are WAY better.

Took the nose plate off since it was bent, and hammered it back into shape. I didn't realize just HOW bent it was, until I went to put the nose braces back on, and they were 1/4" off!


Image


I apologize if the car is a bit dirty in all my pics, it actually gets used weekly.

RS Chris
Approved Member
Posts: 149
Joined: Mon Apr 18, 2016 7:31 pm
Location: Pasadena, TX
Has thanked: 1 time
Been thanked: 19 times

Re: Yellowdatsuns mid-motor conversion, on the cheap!

Post by RS Chris »

Never apologize for racing a race car. It looks good.
Current:RC10T, T3 FT, GT Blue Tub, GT FT, GT2 FT, GT5, RC28, SC28, Micro RS4.

Previous:B2, B3, B3 FT, 10T pink chassis, GT FT, TC3, TC3 FT, RS4MT
Tamiya TA02, Thunder Tiger TS4N pro, Kyosho VoneR, Emaxx, MX4, MP 7.5, 7.5 Kanai.

Post Reply

Create an account or sign in to join the discussion

You need to be a member in order to post a reply

Create an account

Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute

Register

Sign in

  • Similar Topics
    Replies
    Views
    Last post
  • Mid motor conversion for the Ultima?
    by Hcp22 » » in Kyosho Forum
    9 Replies
    1936 Views
    Last post by Sparbolt
  • Graphite Mid Motor Conversion
    by Chewbacca » » in RC10 Buggy Forum
    10 Replies
    1102 Views
    Last post by Chewbacca
  • JRX-T mid motor conversion
    by aconsola » » in Losi Forum
    10 Replies
    1680 Views
    Last post by aconsola
  • B1M RC10 Mid Motor Conversion
    by NomadRacer » » in RC10 Buggy Forum
    106 Replies
    8966 Views
    Last post by DaveM
  • Has Anyone done a tekin Mid Motor Truck Conversion????
    by tecnica2001 » » in RC10 Truck Forum
    8 Replies
    1456 Views
    Last post by Delorean
  • B1M-4, bolt in mid motor 4WD conversion
    by mk-Zero » » in RC10 Buggy Forum
    15 Replies
    2041 Views
    Last post by mk-Zero
  • B1M bolt-in mid motor conversion kits NOW AVAILABLE
    by mk-Zero » » in Conklin Performance Designs
    22 Replies
    6661 Views
    Last post by GoMachV
  • RC10 Andy's Mid Motor Onroad Conversion
    by dahlelama » » in Associated On-Road Forum
    5 Replies
    1340 Views
    Last post by D Nozzle

Return to “RC10 Buggy Forum”

Who is online

Users browsing this forum: No registered users and 33 guests