Dasupacat1

iTrader: (25)

How small is too small when cutting your comms? Is .270 the limit for regular comms? What about large comms like on a Reedy?

sportpak

iTrader: (26)

Word up Dave.. I've heard .260/.265. I have one at .268 and seems to run pretty decent still. I'm not a motor-head, but it runs pretty good. Trust the seat of your pants. Ask big Phil on Tuesday. He's an old wiley veteran at motor tuning.

Marcos.J

iTrader: (217)

.264

o.s. power

iTrader: (14)

I've noticed many stock motors can start to suck past .270, losing lots of torque and efficiency.

UN4RACING

iTrader: (22)

Whats wrong with you guys. True that baby til it peels off.

PitCrew

When you go much past .270, you risk peeling the comm off. No big deal if you don't mind blowing up your diamond bit and getting hit in the face with an armature.

Also, when you are down that small try narrowing your brushes a bit. The increased surface area of the brush wrap increases the dead area that is shorted.

Try this. Comm diameter divided by 2. So, a .270 comm you should narrow your brushes to .135. Then you will have perfect wrap with no shorting.

trf_racer

Can someone tell me what it is in mm?

Thanks.

PitCrew

.270 / .03937

6.86

Dasupacat1

iTrader: (25)

What about big comms?