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Old 01-23-2003, 09:10 PM   #1
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Default RC12L3 Help!!

OK..I just bought a 12 scale ...RC12L3 and just finish putting it together!! very nice car!! but..I have a few problems!!

1st. the kit give me 2 pairs of 10degrees front upper arm mount?? one set is bigger than the other set. and one seem to have more angele on it (small one) which one should I use?? (I install the small one instead)

2nd. It seem like I have to cut off the shock ball cup....to have the shock extend and work properly. This part was not explain in the manuel....I hope I did it right.

3. I try to fit my P2K2 stock motor in it. It fit ok ..and all but I can't use stock gearing. 75pionon w/26pinion. Because the motor placement was really close to the gear. What can I do?? Help.

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Old 01-23-2003, 10:43 PM   #2
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1. I've never seen a 12L3 come with two sets of angled upper arm mounts, could you take a picture by any chance?

2. The shock needs to be long enough that at full extension the rear pod droops just slightly below level. If your pod droops more than just a little bit, shortening one ball cup would be the solution. When the car is loaded and at rest, the pod should be level to the chassis, but when you lift the car, there needs to be that slight droop.

3. It's tough to get a stock motor geared correctly in the 12L. There isn't room enough to run the pinion you need. There are several solutions: Kimbrough makes a set of rear bearing holders that are offest to move the rear axle back a bit, creating more room for bigger pinions, and several companies (IRS comes to mind) offer replacement rear pod uprights that move the axle back a bit. The other solutions are to run a smaller spur gear, or to shave the TBar slightly to allow the motor to sit further forward.

I prefer the smaller spur solution, I don't care to shave my Tbars, and I feel that moving the axle back could adversely affect weight distribution.

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Old 01-23-2003, 11:34 PM   #3
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Ditch the 48 pitch spur and go 64 pitch, that is the only way to run 1/12th scale..... Start around 96 on the spur and 26-28 on the pinion with full height tires....

if you get 24-30 tooth pinions and 90,94, and 98 spurs you should be covered with almost any gearing change you need to compensate for tire wear.....
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Old 01-24-2003, 06:41 AM   #4
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10 degree and 0 degree front arm mounts are included. The angled ones are 10 degree. Start with them.
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