ajg

Brushless motors run just as many rpms as my brushed motor, and most of them top out at 50,000 rpms, mine can go higher. Also, a volt is a volt. If you have a 7.2 volt 4/5 cell battery pack and a 7.2 volt lio poly or lithium ion cell battery pack, you will get the same speed (there will be a little difference because of weight, but not much). Unless some how 7.2 volts just became more than 7.2 volts, then it's going to be just as fast.

I am running a new Epic binary 2 motor, that has 4 magnets on the can instead of 2, so it has alot more rpms, that might be why "the other people", who probably aren't even running 540 motors, aren't getting as high of top speed.

One more thing, there is lots of people, no, not a couple, lots of people, who get up to 70+ mph with their micros. There is even a guy who got his micro up to 60 mph without a 540 motor and using 2/3 cells in a speed competition.

GundamWZero

iTrader: (4)

These "other people" are on your 1/18th board........I would think they run the same motor layout as you. I don't believe that being on that forum and racing a micro, they won't get the conversion kit and put in a 540 motor in to achieve 80+.

Ass soon as I get mines, I will be doing just that.

ajg

Here's a few top speeds of some other micro owners:
56 mph using a 19 turn motor
60 mph Using a 12 turn motor
56 mph Don't know what motor
48 mph using stock motor w/limited space
45 mph using stock motor and 4 cells
52 mph using a 19 turn motor
50 mph using stock motor
41 mph using stock motor and low gearing
45 mph using a 11 turn (crashed at that speed, but didn't break anything)

There is alot more guys who have gone faster, that is just a few that I found in a couple minutes.

GundamWZero

iTrader: (4)

and how many turns are you running?

Cardboard

Huh? I don't know squat about mods but i'm pretty sure none of them have more than 50,000 rpms. Also, the venom speed meter and all in-car speed meters SUCK. Not accurate. They don't even get close. If you want a true reading on speed, you need a radar gun. Try to get a bored cop to take a reading for you.
BTW, what turn of the binary are you using?

ajg

10 turn

Cardboard: Have you tried the venom speed meter? I get around the same speed doing the distance time thing, so unless both of those a wrong (which they aren't), then I'll try radar.

ajg

I'm running 48,003 rpms on 6 cells with a 10 turn. Go done to a 6 turn and 10 cells, it would be over 50,000.

Cardboard

I haven't tried it personally, but I haven't heard much about it besides complaints.
Where did you get those rpm numbers?Off a dyno with a load? Just wondering.

ajg

It was dynoed.

ajg

Some people have already made it to almost 100mph (that I know of) on there first run, without even being finished with their projects. I think some people are going to top 150 mph, faster than I want to go.

kufman

iTrader: (6)

Actually, voltage isn't everything. You need batteries that can push enough current to feed the motor. If you can't get enough current, you can't get the speed.

Brushless motors will turn higher rpm's for longer periods of time. Brushed motors will go out of balance very quickly at 50,000 rpm.

If you can't get atleast 15 amps out of the batteries you can't get the motors up to a descent rpm. Even with good batteries, brushed motors will not hit 50,000 rpm under load on 6 cells. Dyno results in car action only prove the unloaded rpm since those dynos are moment of inertia based and not real load based.

ajg

My cell can definately push enough current, I'm running the same cells as almost every other 540 micro owner.

Also, I doubt that brushless motors are dynoed any different, so they still have the same rpms is not more.

You guys think that brushless motors are better than they really are. Sorry, they're not that good.

Anyone know if I can go up a few pinion gears? More like a 30t, instead of a 28t (I'm running a 58t spur and a 28t pinion).

DOMOisCOOL

Depends what BL motor you're comparing to.

ajg

Is there any that can go over 50,00 rpms and are 540 size?

kufman

iTrader: (6)

If you think brushless motors aren't that good, you are sadly mistaken. True, novak's isn't that fast, but other companies do make brushless motors that will pretty much kick ANY brushed motor in the pants.

As for you question, I think you will have trouble getting any motor to maintain 50,000 rpm's while under load and only on 6 cells. The problem is the current draw to get the motor to produce that kind of power. Those little cells can't push out 30 amps continuously. Probably your best bet is to go higher is cells and higher in motor turns. That way you will draw less current to develope the same amount of power. Using a setup that has less weight would probably help too. A Mamba setup from Castle Creations would probably work far better than stuffing a .05 into a micro. Just my opnion, take it or leave it.