Too bad we missed you, there were only five 4x4's on Sunday. 18 seconds I wish, I turned a 19.2 in the 1st heat running the SC10 4x4, which was 0.5 seconds faster than when I ran the Tekno in the 2nd heat. I hope to get that down to an 18 sec lap, both trucks need shock tuning big time, I didn't have time to mess with the shocks because I had four trucks to work on that day. They are supposed to be changing up the layout this week.

This may have been covered here before, but I couldn't find it...

Has anyone tried to do a lightweight e-buggy conversion with one of these? I've seen the Mugen and Tekno versions, but haven't heard of an SC10 4x4 conversion. If so, please point me in the proper direction. Thanks.

Still a lot
They need to change the layout.

You drive my Tekno setup and I'll drive your lite You'll find the elusive 18

Shark,

A gas wrench and 6010 are more my style then a lathe, but I may have to sneak into the machine shop next go around on night shift... Cool work.

I'd be very interested in a kit to do that mod, along with the new c-diff when it's ready .

After a weekend of practice/racing I got a chance to tear the 4 gear tranny a part to inspect for wear. There was a light dusting of metal that I assume was from the metal pinion/idler gears. The wear on the gears was not bad and with an application of dry lube should not be a problem. I may need to look at using a larger idler gear for more surface area and better wear. But I need to do a lot more testing before I decide if the wear is excessive. I am not too concerned with the pinion/idler gears, but more so about the spur to idler mesh. As the idler wears I have no way of adjusting mesh, and the softer plastic spur needs a good mesh to prevent stripping. I considered drilling the spindle hole slightly off center so it could be rotated and this would provide some mesh adjustment, I may need to revisit this in my next prototype.


Metal dust. Hopefully once the gears seat and I apply some dry lube excessive wear will not be a problem.

And I am a big believer in doing things "Smarter not Harder". Since my 4 gear motor is now held by two screws along the bottom of the motor plate I was concerned with the motor sagging on big G outs and messing up the gear mesh. At first the plan was to make a derlin wedge that would fit under the motor can and provide support between the end of the can and the chassis. But after measuring the space I found that I could use a simple tie wrap. After searching for the right size/thickness I just wrapped it around the motor can and it now provides support for the end of motor and reduces motor sag.

Really good work Shark.

WaftyCrank, thanks. How are the SC10 4x4's doing over on the other side of the pond?

Here are some close up shots of the idler after one weekend of practice and racing (about 6 packs). I was a little concerned about the metal on metal wear of the pinion on the idler, seems to be ok, but I will need to do more testing to see if the system will hold up.


Close up of idler gear.


Another shot of the idler, you can see some rounding of the edges of the teeth.


For comparison here is a picture of a relatively new pinion gear.

yeah, now i dont feel so bad there is something going on for sure. thats a of of wear for such short time. I wonder why? it has to be coming from the motor pinion but it may just get to a certain spot and then be OK.

You know what the cure for this is.........BELT drive!! Much simpler, can use the same motor plate and would only require a custom spur gear. i think i can buy pinion size idlers!! AAAAWWWWW SNAP!

Yeah I need to do a lot more testing and get more mileage on the system. I am not as concerned with the wear on the pinion/idler, metal is pretty strong and will not strip even when the teeth show a lot of wear, but the plastic spur on the other hand needs to be nice and tight (especially 32p gears). I think the Traxxas clutch bell may not be hardened as much as the pinion. And yes I hope the gears will set in and the wear will be a lot less going forward. Belt drive?????? Cain and I talked about belt drives and CVT transmissions.


New bearings, dry lube and everything back together.

Over on the RCSC forum someone started a thread asking if the SC10 4x4 will be discontinued. His reasoning is many of the larger retailers (Tower, AMain) either show a reduction in the models available, show some models as discontinued or on back order. Speculation is there is a new model in the works. Since this forum gets a lot more traffic I thought I would ask here and welcome your thoughts, comments, etc. I really like my SC10 4x4, but I guess a new and improved model would be a good thing (center diff, 4 gear, stronger arms, easier diff/servo access, better droop adjustment, etc).

based on what i am seeing the more industrious members doing like you shark, the vehicle has tons of potential. I hope the ideas you and others have been working on come out in a new vehicle.

Scoop up your sc10 4x4s now, prices could shoot back up!

New to SC10 4x4. Just got a FT from a fellow racer and running it on an asphalt oval. Really like it.

Running a Castle 3800 and MMP ESC. Still learning throttle control.

No real tricks other than battery on the left and restricted shock travel.

I've seen reference to Center Diff's in this thread. What does this refer to and what advantage do they offer?