SCX 1970 Cuda HELP!

[davek]

I run magless @ 10.5 volts. All cars are happy, but this car! Needs tires, that's ok.any motors for this car to keep up with the scaleys? :flags-waveusa: Thank You in advance :flags-waveusa:









you in

[Nor Cal Mike]

One of the Scaley Cuda's. the blue and white one, came with an RK41 motor. From what I have heard, this motor is the best for running at lowered voltages against Scaleys. If you go to Ebay, you can get one of them already mounted in a 2 pin pod for $15 bucks. It should snap right into your car so it is plug and play.

[arroldn]

I have heard in the past that switching to a 10T pinion would help. I've also heard and witnessed that SCX motors generally like a little more volts. Can you bump up to 12V ? Not sure which motor is in the Cuda but the 42B & runs pretty good against stock Scaleys and the Pro Motor is competitive with Slot.it 21.5 motors. Just turn up the volts.

Arrold

[Dangermouse]

SCX motor tuning

http://www.slotcarouthouse.com/viewtopic.php?f=8&t=229

this works - the chap who wrote has some quick SCX cars :) he is a good driver but the cars are quick - I tried this on an SCX Alfa with RX42 motor and gained 1500 rpm @12v

David

[Dangermouse]

Have you tested the RK-42?
cheers
David

[dr fabio]

You don't say whether the rules you race under dictate that you can or can not change motors? Change motors if you are allowed. If not then make the best of it. Do you have the RX42B? This motor can be make to be competitive. Change to a 10T pinion as the motor has a lot of torque compared to a Scaley. You can squeeze 21K out of a RX42B without opening the can, depends how brave you want to be. This will turn it into a Scaly beater as the motor has a lot more torque compared to a Scaly, just lacks RPM.

Remove brushes from motor. Note which brush came out of which side and the orientation!! Mark them with a scriber to make sure they go back in the same way. Place brush on the tip of a soldering iron. Smoke will come off the brush. Remove once no more smoke is emitted from the brush.

Motors run too much spring tension. Bend the springs so that the legs make a 90 angle.

Move the magnets in the can so that the armature is not hard pressed against either the can or endbell bearing. Moving the magnets towards the endbell is easy. Use a soft tool like an icecream stick. Do not use a hard tool as you make crack the magnets. Moving the magnets towards the can end is also possible. Use a small diameter rod and poke it down the hollow spring post.
The motor needs to run a more advanced timing. Looking at the endbell the motor turns anticlockwise. Move (bend) the LHS brush holder up. The RHS brush holder move (bend) down.

How brave are you? The magnet/armature air gap is too tight on these motors. If you can remove the armature its a lot easier but it can be done with the armature in place. Remove the armature and measure the diameter of the stack. Remove about 0.1mm off the diameter. Place armature in a drill press. Get some wet rub emery paper, about 180 grit and glue to an icecream stick or similar. start the drill press and apply the emery paper to the stack. Sand off about 0.1mm. BE CAREFULL. If you can not remove the armature it is possible to do this with the armature in the can. BE CAREFULL.

[OctagonSpirit]

Another option would be Slot-It PN #SISP08, which is an adaptor that allows you to put an FC130 style Mabuchi motor (like the one Scaley uses in their Trans-Am cars) into an SCX car with an RX style motor. I've used them before in SCX LMP cars to run them among Slot-It's.