Originally Posted by bdebde (Post 194849)

I always thought the Pletts were 4 pole, they even have P4 (poles 4?) in the part number. After running my big maxx on the MGM controller and looking at the peak rpm (when set for 4 pole), I get a max rpm of 78,000 on 6s (22.2 volts) in the software. If you convert that over for 6 pole, it would be 52,000 rpm. The big max is supposed to be 2300 kv, so 22.2 x 2300 = 51,060 rpm, which makes more sense and leads me to believe it IS actually a 6 pole motor.

Originally Posted by lutach (Post 194726)

Now days I'm getting more and more confusing as some companies say to run low timing to keep temps down. I always go mid or 5 degrees of timing for 4 pole motors and high or 10+ degrees for 6 pole motors.

Originally Posted by Bernie Wolfard

All Castle Creations speed controllers provide dynamic timing advance. This means the advance setting changes with speed and load on the motor to maximize the efficiency of the motor as all speeds. Changing the timing advance setting lowers or raises the range in which timing advance moves. The advance settings actually overlap quite a bit.

Generally, outrunner motors work best with high timing advance. However, one of the motor characteristics CC ESCS compensate for is motor inductance. The high inductance of outrunners pulls timing advance up. This means that for most medium to small outrunners 'Standard' timing advance works well. With these the only reason to lower timing is if the motor is running too hot or if it starts making noise above half throttle. The noise means the ESC is loosing sync with the motor.

With larger outrunners we recommend 'Low' timing advance. The larger the outrunner the higher its inductance. These larger motors inductance pulls our ‘Low’ timing advance up to the higher timing advance these motors want without having the advance get so high that the ESC can no longer sync the motor.

Hope this helps.

Bernie

Originally Posted by Bernie Wolfard

The difference between medium/small is somewhat subjective as different motors behave somewhat differently. When I wrote the above I was thinking about AXI motors where anything below the 4100 sized would be medium/small, 4100 and up would be large.

However, if you have a large 2800 series motor that makes noise over half throttle lower the advance. It is also a good idea, if you like to fiddle with things, is to change timing between 'Low' and 'Standard' and see if full throttle produces more or less RPM.

To make it easy, as long as the motor is behaving OK don't change timing. If it is making noise at higher throttle settings or running too hot lower timing.

Bernie

Originally Posted by Serum (Post 195215)

http://picasaweb.google.com/buikpijn/Bigmaxximum

and this is what a bigmaxximum looks like.

Originally Posted by lincpimp (Post 195216)

OOOHHH!!!

I really would like to have a Big Maxx, Expecially considering how well the Maxx w/fan runs in my emaxx! I bet that 5s with the big maxx would be a handfull!

Originally Posted by brushlessboy16 (Post 194957)

can some one tell me where to get kevlar string?

Originally Posted by bdebde (Post 195440)

And 6s with a big maxx is more than a handful, he he:yes: