MGM compro + feigao 6s + TC4

[RC-Monster Mike]

I haven't used mine on more than a 3 cell Lipo. Are the cells good quality? 12 cells is a bit much for the 6s motor, so I am sure it is drawing some serious current. The 6s on 12 cells will definately draw more than 80 amps on hard acceleration (motor isn't meant for this high cell count- 6-8 cells is a better place to be on this motor).

[MikeyLikesItSI]

:mad: thats no fun..... so less batteries or a higher wind motor?

[RC-Monster Mike]

You got it! I run 11.1 lipo on the basic 4200 in my tc3. The 4200 could take 12 cells as well, but I would probably go with a basic 3600 or 3100 even on 12 cells. The 6s on 12 cells would be over 80000 rpms! Yikes! On 8 cells, the 6s is still pushing in the mid 50k rpm range, which is pretty fast.

[MikeyLikesItSI]

pretty fast? since when is pretty fast, fast enough?! i figured that 80K+ too, but lets face it, all the resistance on the drive train at 60+ MPH i think would restrict it to less then its 60K recomendation

[RC-Monster Mike]

Well, the batteries would drop in voltage as well, so it likely won't hit the 80k rpm mark. I would assume it will probably exceed 60k rpms if you have good cells. The bigger issue is the amp draw, though. Are you using full size cells? How about gearing? Also, let me rephrase - the 6s on 8 cells will be VERY fast!

[MikeyLikesItSI]

6s on 8 cells = not fast enough ;-) i cut the pack down and made it 8 cells (they are just generic 3300mah cells), i changed acceleration to .26 seconds, and it seems to be pretty happy with that. i have the gearing pretty tall too. 26/72, i think i'm gonna pick up a 30 tooth pinion just for ha-ha's.

BTW, if i can still control it, its not fast enough :-)

[RC-Monster Mike]

A simple upgrade in cells will provide more performance as well.

[MikeyLikesItSI]

What would you recommend mike? How about in the lipo field? i'm interested in owning a pack or two. can i get them through you? how bout NIMH?

[SpEEdyBL]

My experience with the 6S on 7 gp3300 cells in a losi xxx4 geared 21/94 = not fast enough. My novak geared 23/94 is almost as fast and accelarates just as quickly. Maybe I'm doing something wrong. I've tried "automatic 5*, 10* and 15* timing and higher gearing. Nothing seemed to work. Very quiet and efficient motor though. And I still get 7-8min of runitime on 2600mah charge.

[MikeyLikesItSI]

Speedy, 21/94 gearing is a pretty high ratio, 4.47:1. Maybe try 24 tooth pinion? I can't say i've had problems with this motor not having enough power, my problem seems to be GIVING this motor all the power it needs!

[RC-Monster Mike]

The 6s motor should very easily beat the Novak. It shouldn't even be close! Perhaps your batteries can't deliver the needed power to capitalize on what the motor can deliver.

For cells(mikey), a decent set of nice voltage gp cells will spice it up a bit. The 6s can draw some serious power, so if your cells can deliver the power, you will have a beast on your hands. I can supply the nimh, but I don't currently offer Lipos or Lipo chargers.

[MikeyLikesItSI]

ok, but on the contrary, before when i had it on 12 cells, apparently i was applying all it needed, in fact, more then it needed because the controller was activating its protection (what a wonderful little circuit). so some spicier cells produce the same results? (figuring the voltage drop wouldn't be as severe)

[SpEEdyBL]

The cells that I'm using are gp 3300s that were once matched. They are pretty old though. I know what I'll do, I'll put muy two 7 cell packs in parallel and see what happens. That should be able to supply twice as many amps.

[SpEEdyBL]

...Ok I just tried my two 7 cell packs in a series. All I can say is W0W what a difference!!! I actually got to the point where my car was unstable at top speed. It looked as though the balloonaing of the tires raised the ride hight about an inch. Must have been 50mph. maybe more. And the motor was barely warm. For those of you that want to run higher voltage and a lower kv motor, you can acheive the same with a higher kv motor and more cells in parallel so you don't have to buy a new motor.

[RC-Monster Mike]

Sounds like fun! I had my old RC10T2 about 65mph with a 6s on 8 cells! Too fast, if you ask me, but it was fun for the time! Great for showing off as well!