modifying P2k2

[The Red Comet]

The P2k2 is a great motor so i decided to modify mine. I currently have low fritcion brushes and bearings and I think a triple single internal spinning thingy part (im kinda knew to this dont know the technical term). Along with low friction bushings and deans connectors on every elctronic for easy repair. its all wired to a tekin speed star and 7 sayno 2400 cells. its all crammed in my basically stock SST2000 with exception to the purple heatsink and aftermarket springs and shox. I love this car its easy to tune and everything and i timed it at about 45-50 mph it turns like its on rails and ilove parking lot racing with my friends, one has a TC3 and the other has a tamiya i think Tlo3 or 4, however iwant to try to modify it more and try to get either more run time and top end out of it any suggestions, i am using an old futaba magnum Am as the radio.

[The Red Comet]

hmm... since nobody has replied i will tell you how stupid i am. i took the original p2k2 armature and tried to rewind it bad hand just for the hell of it. Well i tput it all back together nad i was spinning VERY VERY fast. the noise hurt my ears it hink it was 10 or 11 winds. I put it back in and set it on the ground it started smoking after about 10 sec then sparks began flying out of the air ducts i quickly grabbed it and pulled out the connector for the battery. My base ment now smells like an electrical fire. I took the engine apart cleaned it and replace the other aperture from a Matrix modified i think 16 or 18 wind motor back in it put in some buggy blast and now its fine. please feel free to comment on my curiosity and stupidity.

[mpower7477]

lol thats funny. You turned your p2k2 into a 11 turn :D. I gotta try that with the motor that came with my tc3 RTR

[HYDRAMATIC99]

Umm.....sure ya did:rolleyes:


So do you have low friction bushings or bearings? Or do you have both? :rolleyes:

[AudiTT-Quattro]

Originally posted by HYDRAMATIC99
Umm.....sure ya did:rolleyes:


So do you have low friction bushings or bearings? Or do you have both? :rolleyes:

Agreed.

[rx78gp03s]

well its possible. to have both. low friction brushes, totally possible. the only friction induced by them are when the spring presses them against the armature, soo if u decrease spring pressure u would get less friction. (waiting on comment on here)

and as for lower friction bearing, you can use magnets as bearings. they are pretty much 0 friction bearings. but i highly doubt u'd be able to perfect it.

[crank throw wei]

I think audi TT and hydromatic need to reread that post.He said brushes,not bushings.:)

[AudiTT-Quattro]

Originally posted by rx78gp03s
well its possible. to have both. low friction brushes, totally possible. the only friction induced by them are when the spring presses them against the armature, soo if u decrease spring pressure u would get less friction. (waiting on comment on here)

and as for lower friction bearing, you can use magnets as bearings. they are pretty much 0 friction bearings. but i highly doubt u'd be able to perfect it.

Magnets as bearings? Zero friction? Theres no such thing as "absolute zero friction", at least to our knowledge. But in order for "Magnets as bearings to work. You'd have to somehow "float the shaft" in between 2 bearings on each axle (harder to do with 1) and also worry about the shaft moving back and forth, but thats where curved angular magnets come in.

Doing all that, you'd still have friction in other forms known as air resistance and stupid gravity from the earth and the moon.

[AudiTT-Quattro]

Originally posted by crank throw wei
I think audi TT and hydromatic need to reread that post.He said brushes,not bushings.:)

You be quiet and sit in the corner while mommy and daddy talk. :)

For all you know, I could have been agreeing with the other part of the message, but I wasn't. ;)

[rx78gp03s]

who said it was my motor? im' just guessing wut he did/used to modified it.

[biturbo15]

hmmm this sounds interesting. .. Modifying motors. I have a trinity speed gems 9t double.. is there any thing I can do to this motor to make it faster? bearingS? sprigns? brushes? I dont even know how to modify a motor, do I get a new armature? help a newb out!

[crank throw wei]

Originally posted by AudiTT-Quattro
You be quiet and sit in the corner while mommy and daddy talk. :)

For all you know, I could have been agreeing with the other part of the message, but I wasn't. ;)


I knew what you mean't.As far as being quiet,you'll have to do alot better than that son.:p

[AudiTT-Quattro]

Originally posted by biturbo15
hmmm this sounds interesting. .. Modifying motors. I have a trinity speed gems 9t double.. is there any thing I can do to this motor to make it faster? bearingS? sprigns? brushes? I dont even know how to modify a motor, do I get a new armature? help a newb out!

Switch in some cobalt magnets and the P-94 brush upgrade. It's not legal, but you'll have one smokin' motor (no pun intended). :)

[biturbo15]

what do u mean not legal? Can I race with it? Can I race if I only do the brush upgrade? is it hard to switch out the magnets?

[HYDRAMATIC99]

Originally posted by The Red Comet
. I currently have low fritcion brushes and bearings


Along with low friction bushings


crank throw wei, looks like you need to re-read the post.

[AudiTT-Quattro]

Originally posted by crank throw wei
I knew what you mean't.As far as being quiet,you'll have to do alot better than that son.:p

Quiet now? Hehe. :)

[The Red Comet]

sry for the confusion i had a typo i have lowered the friction by replacing the gold bushings in the end bell and bottam half with bearings from a speed gems, and also put in two new p94 the ones with the dual shunts the guy told me the increase the conductivity but reduce friction on the comm. The armature is from some old modified called a matrix i think its a 12 turn i put that it and it runs really smoothe however i had to put some holes in the front air dam of my body to get better air flow.

[crank throw wei]

Originally posted by The Red Comet
sry for the confusion i had a typo i have lowered the friction by replacing the gold bushings in the end bell and bottam half with bearings from a speed gems, and also put in two new p94 the ones with the dual shunts the guy told me the increase the conductivity but reduce friction on the comm.

AudiTT :No!:p :D Like I said son,you'll have to do ALOT better than that!:rolleyes: It was quite evident(to me anyway) that it was a typo.No biggy.

[born2rc]

WOW, now that was creative thinking Red Comet. You really must have money to burn

[biturbo15]

how big of a difference do cobalt magnets make? what about brushes?

[rx78gp03s]

well i can tell u one thing about cobalt magnets.... they are out of drag racing motors. and they are balistically powerful compared to an average magnet out of a speed gem.

[biturbo15]

so lots more power.. yay. sounds good. DO they increase wear? do the magnets wear out?

[AudiTT-Quattro]

Cobalt magnets will de-stabalize in a couple hundred thousand years. (calculated with half-life) I don't think you should worry too much, :) .

[biturbo15]

Are there different types of cobalt magnets? what company's make them?

[masterblaster17]

I do not know much about the motors so ill try not to sound stupid, but what magnets do u switch with cobalt?

[rx78gp03s]

well first off, cobalt is a rare earth metal. so if u do get a chance to grab one, the price is very very expensive. sooooo good luck.
the magnets on your motor can.

[highroller]

Removing winds from a motor will break the insulation off the wires causing a short. Winding wire around it to make your own, will lead to the same thing. You'll need to obtain insulated electrical motor wire, a means of balancing the armature and shimming it.
Installing bearings doesn't increase power, just reduce friction but a properly prepped bushing can be as free. Putting a modified armature in a stock can, without changing gearing, spring tension defeats the purpose or any performance gains. It's like running a modified motor with 24 degrees of timing with a stock gear ratio. Runtime is shortened and motor gets hot due to over gearing.
Changing magnets, brush hoods (standup to laydown or larger brush like the P94). It may show an increase in Torque and decrease in RPM or vice versa while the actual HP may remain unchanged. Changing or improving the HP that a motor produces is the actual indicator of it's speed. Stronger magnets, larger brush face, heavier spring generally increase Torque, while less brush area, lighter springs, bearing (less friction) produce better RPM but actual HP will remain unchanged.
To see a total improvement the armature needs to be aligned in the center of the magnetic field of the magnet, bushing and armature shaft polished to reduce friction, armature needs to be shimmed/aligned to prevent excessive movement, comm trued to prevent irregular high spots, selecting brush cut and compound that produces the desired power, selecting right spring tension and finding the gearing to suit the power output of the motor.

[biturbo15]

so really what you are saying is motifying your motor is worthless? You said that doeing those mods increases rpm but reduces torque or vice versa. But they dont increase overall horse power... so there is no realy change in speed... I am ont sure if that is true. IF it was no one would buy springs or cobalt magnets...

[mobiusthegreat]

not true, if you omcrease rpm's you increased speed, if you increase torque you increase your acceleration. of course you will have to gear accordingly to you the increase power.

[biturbo15]

but he was saying that if u increase rpms u lose torque or vice versa. But as I now understand it. Silver brushes only increase RPM, Bearings rpm, a lower wind increases rpm but loses some torque, and cobalt magnets increase both RPM's and Torque but are very expensive and it is better to try hand wound before trying to switch out your magnets.. Do I have it right?

[crank throw wei]

That all sound right to me biturbo.1 thing though.adding bearings is a win-win.Increased rpms with no drop in torque.Just an improvement in efficiancy.BTW,congrats of getting your name in the latest issue of RCCA.:)

[biturbo15]

I got my name in RCAA?

[rx78gp03s]

lol

[biturbo15]

hold on did I? LOL? I get mine this week end.

[crank throw wei]

Your in the back where they give a little snapshot of the message board.:) It's on page 145,about unmatched vs matched packs.

[rx78gp03s]

did my name make it as well?

[crank throw wei]

Nope,sorry RX7.:( Don't feel bad,neither did I.

[biturbo15]

Sick! Thats awesome thank you.