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Hi guys,

I see many people saying scx motors are lacking..... Give them amps and they come alive. wallwarts dont quite do it for scx motors. You may have wallwarts pushing out upto 18v's, they are going to rev higher, but its the time it takes to get to full rpm thats making them sluggish on acceleration. Try running a car off a 12v car battery and see the difference of how much quicker it gets to peak rpm.

I discovered this when i built a few scx motors of my own (rewiring the arms). the hotter the wind, the worse it got. At the club where i race (not a member so i am allowed to run what i want as i am not chasing title points) the guys are trying to discover what i am doing to my scx motors, they started turning down the amps, and my cars suddenly got sluggish out of corners, so i compensated by going higher gear ratios (which helps a bit) so i still get peak rpm on the long straights. The std scx's have me out the corners but half way down the straight i fly past them like a Ninco NC6 with nitrous oxide. LOL
I have RX42B's and RX41's PUMPING out in the region of 30k-35k and it is clearly audible down the straights. If they turn the amps back up to what it was, i will be taking on Ninco NC 6's and NC 10's for breakfast from the drop of the flag.

Just give them scx motors AMPS!!!!! That is what they want. 5 amps at the least.


Cheers,
Tony
 

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QUOTE Just give them scx motors AMPS!!!!! That is what they want. 5 amps at the least.

and a rewind?
 

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I started out by buying 2 carrera evolution sets and used the 2 provided power supplies, and the scaley's and nincos made the scx's look like a good joke. I then opened them up and bridged the 2 outlets of each power supply to make 1. That upped the voltage by 1 volt, but took the amperage up to double (close to an amp) and the scx's doubled in acceleration and kept up to the scaley's and nc5's. No noticable difference was visible on the scaley's and ninco's as they require like only 300 milliamps to run efficiently. i then hooked up a car battery to run my 16D and super 16D's, and then the scx's came alive. The scx's i build (motors), pull 2.4 amps under load while riding on track. That is not far off the 16D motors. A scx prospeed has +- 3.9 ohms across the poles on the com, and the 1's i build average between 1.9 and 2.4 ohms.

On my dyno,

Blue printed RX42B : 4.50v (10-27) gear ratio
Blue printed prospeed: 4.87v (10-27) gear ratio
Blue printed RX4H : 4.98v (10-27) gear ratio
Rx42B Rebuilt by me : 5.22v (9-30) gear ratio
Rx41 Rebuilt by me : 5.70v (9-30) gear ratio
Rx42B with 16D arm : 6.27v (9-27 ) gear ratio

As you will notice, the difference between the scx motors is minimal on my dyno, but there is a huge difference on the track, so just imagine the performance of my rebuilt scx's if it has such a big jump on my dyno. (note: Torque is Higher too
)

I have a page on FB if you guys want to visit and check out some cool slot cars and scratch builds. Just search " Slot Cars" and look for a profile pic of a metalic black/gold 1968 pontiac GTO with "shriek racing" above it. Thats my site.

Cheers,
Tony
 
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