Hyper1

The "F" brush will run a little hotter,you gotta gear down a few teeth with it,but it will fly when you hit the gear.Make sure you break it in good and file those edges down a tick,I've been running a fiberglass com stick over the face also to help with the mold release problem.

StewartFan20

iTrader: (4)

I hear someone say they will take a new motor and cut the comm down to a specific size.

Does anyone else do this? If so, why and what size? Also what what does this do to the life of the comm?

Thanks

nmt6789

I've heard that people just skim the comm with a new motor...........

berger

iTrader: (1)

If the motors from Trinity then yes ill put a light skim on it as they can be out of round from the factory. Just a very light one though.

Losi Will

Cutting the comm down to .275" from new will remove some of the armature's rotating weight and let it spool up slightly faster. I wouldn't bother with it unless you feel like replacing armatures every weekend.

StewartFan20

iTrader: (4)

Thanks. And that answers my next question....What does it do to the life of the arm?

Thanks again. I am new to this electric motor stuff and still learning.

dr_hfuhuhurr

iTrader: (95)

Rotating weight? how much does .015" of copper weigh? There's a different reason for doing that but I don't think weight is the real reason...someone else can give you the real reason. I think it has to do with brush wrap around the comm.

micros_rock

Smaller comms give more torque because the brush can come into contact with more copper. So the 3 comm segments are in contact with the brushes 100% of the time. You get more power, but lose efficiency because the comm shorts out a fraction of the time. I believe. this is correct.
.270 is the smallest you should cut your comm to.

StewartFan20

iTrader: (4)

So, once the comm is below .270, the arm should be replaced?

dr_hfuhuhurr

iTrader: (95)

My favorite Monster right now is still screaming at .265" Cut it till you can't anymore is my thinking.

Blake

crACkeD ChaSsiS

iTrader: (4)

ya thats wat i did with my p2k2 and man was it hauling!!

BSchorr

iTrader: (101)

Hey,i run p2k2 in my tc3, I dont know what tooth spur gear i have, and im not to sure what pinion i should run, right now i have a 24 tooth in it. i have Fusion 1.183 packs to back me up.


here is a pic of my track general weekly layout, would you consider this a speed track, or a torque track what motor would you recommend /pinion,spur,brushes and springs. lol i ask alot!


Here is a pic of the motor/spur

Lost Aggresiva

iTrader: (2)

Don't hold me to it, but I believe that every 0.010" off the comm is supposed to be like advancing the timing by a degree or so. Or something to that extent.

micros_rock

Kinda hard to gear your motor if you don't know what your spur is, isn't it?
Figure out how many teeth are on the spur, it should say on it. With that motor and track, you'll probably want a final ratio of about 6.8.

crACkeD ChaSsiS

iTrader: (4)

bschorr-looks like u would want more torque than rpm. the track looks little on the technical side. but looks like youre running the right motor for torque. but u can also may want to try a monster stock. my 2cents