SlotForum banner
1 - 4 of 4 Posts

·
Registered
Joined
·
2,378 Posts
Discussion Starter · #1 ·
I recently picked up a couple of Ninco belt drive transmissions, primarily to install one into an SCX rally car which is no longer 4wd because I installed a standard motor with no forward drive shaft. I didn't really expect to return any advantage to the car, it just seemed like it should be 4wd.

Well, it wouldn't fit easily because the rear magnet mount was in the way. I didn't feel like cutting the car up just to make it 4wd again, so I installed it into a Ninco Seat that I had. I figured it should work since they make the same model with 4wd. Pretty easy install, just had to remove a couple plastic nubs from the chassis and press on the pulleys. Being an NC-1 car, I really didn't expect any improvement in lap times, in fact I kind of expected the opposite due to increased drag. It dropped .2 seconds!?! Hmmmmm??? It also seemed easier to drive, not as likely to fishtail badly.

I had to explore this further. I looked at some of my other Nincos to see if the wheelbases were right for the belt length. The older Porsche 911 GT1 was just slightly longer than the Seat. Install was no problem. This car has an NC-2 motor now and had always seemed a little looser than the McLaren GTR or Mercedes. I assumed this was due to older, harder tires and shorter wheelbase. Result, .2 seconds quicker than before. And once again, seemingly easier to drive, less likely to get loose. By the way, all of these are with no magnets on a fairly twisty Sport layout. At this point, I have to assume the 4wd helps hook up acceleration just a bit. The belt drive doesn't transfer very much torque, it slips easily, but maybe just enough to help? Anybody else ever try this?
 

·
Registered
Joined
·
2,378 Posts
Discussion Starter · #8 ·
Interesting comments guys, you may be right about the lap times being in my mind, but it's fun to tinker anyway. I have another pair of cars which have often made me ponder this same question. I have an SCX F40 and an SCX Audi 90 Quatro, both from the American IMSA GTO series. The Ferrari is a standard 2wd and the Audi has the rally 4wd dual shaft system, but with large slicks on all four corners. The F40 seems to have a little more snap out of the turns and maybe a bit more top end, but the Audi runs virtually identical lap times (one of my favorite pairs!). I had previously thought that the advantage of the 4wd seemed to be mostly under braking, the Audi can go very deep into the end of the straight before braking. But now I think that maybe there is a bit of acceleration traction assist as well? I have a couple more Ninco belt systems on the way, so I will report back my findings on future 4wd project.....Hmmmmm.....I wonder if I can put one on that Fly truck?......
 

·
Registered
Joined
·
2,378 Posts
Discussion Starter · #12 ·
QUOTE (TSRF @ 28 Sep 2004, 16:41)Customer's delusions greatly help Ninco sales.

Film at Eleven.


Well at least my delusions are helping someone, for once!?!


RMM, I know the belt doesn't transfer much power, but I haven't really noticed much loss. Are you saying it would create more drag if tight enough to traqnfer more power to the front? The Lambo Diablo and Murcies transfer only small amounts of power, about 10% I believe, but it seems to be enough to give a control advantage. I agree that with a magnet, it is probably not. I will do some back to back to back tests and see what I find.
 

·
Registered
Joined
·
2,378 Posts
Discussion Starter · #14 ·
Max, you're running magnets, right? It could only be an advantage when you can spin the tires well out of the turns.
 
1 - 4 of 4 Posts
Top