Originally Posted by Gibsoneb
If you want to go fast, like they do at the TCS races, you need to find a old silver can motor that they do not make anymore, it has 4 slots in the can around the circumference on the end, close to the brushes. Todays motors only have 2 big slots. This motor is equivilant to the the Sport Tuned Black Can 540 that Tamiya offers now. I believe it was made by Johnson, It is hard to find because it came in older kits. TCS lets you run it even though it blows away the current kit silver can motors. As long as it looks like a silver can, your OK.
Equivalent to a black can sport tuned (23T)... I don't think so. The early silver 4 vent can was manufactured by Mabuchi and did have a slightly softer brush. The newer 2 vent can you see as OEM on the currently released Tamiya kits is manufactured by Johnson. Both of these motors are 27T, 0' timing.
The motors provided at the TCS Nationals last year were Johnson's. They can be quick if broken in correctly (very hard brushes)