Running higher timing on lower pole motors can increase the heat substantially. I ran my Mamba Max 5700 at highest timing and it showed an increase in performance and speed but my ESC, motor, and batteries all ran hotter. I turned it all the way down to lowest and the performance wasn't much worse but the ESC, motor, and batteries all ran cool.

Is it possible to have a suggested value for my 6 pole motor or I have to find it with testing? How can I understand if i got the correct value? do I risk to brake the esc or the motor if i choose a wrong timing value?
thanks

I've been told by a very knowledgeable person that for a 6-pole motor, a min of 15deg timing is required.

http://e-savage.com/forums/showthread.php?p=37495


Read the post by Kostaktinos_mt.

Thanks I'm appreciating a lot this help...very interesting what Kost says...
Last question, my motor is outrunner I think the one in that topic was inrunner...does this fact make it necessary modify the timing some more???

There is some differences between HW 80 and 150...for example inner resistence is lower with 150 which means it will stay cooler at same ampere condition.
cheers

I don't believe an outrunner would have an affect on the timing.

Yes, the 150A will likely run cooler in an identical setup as you're stressing the FETs less. Still, I have not had my 80A even break 90F.

Another question as to which esc should I be getting....

My E-savage on 4S peaks at 81A (the highest of all recorded peaks - the average peaks are at 70A) so should I get the 80A HW or the 150A?

Either will work fine. The 150 will just stay cooler. And it will support 6s should you ever want to upgrade.

Hi thanks for the reply. I am wondering about the temp of the HW80A at 80A. Do u have any real data on the temp of the HW80A running at 4S 80A (around 1184w) ?

I have no test data, but transients are for a short period and don't carry that much energy. That's why surge/transient ratings are always considerably higher. The 80A EZRun is rated for 270A surges, which sounds well guardbanded for your 81A surge setup. Continuous currents shouldn't be that high and thus not stress the ESC much.

BTW, how you do guys monitor the current consumption in your setups?
Do you have a datalogger that monitor voltage and/or current with time?

I am using a watts up meter.

You could use something like the Eagletree E-Logger:
http://www3.towerhobbies.com/cgi-bin...gger&search=Go
Only problem with this is its maximum 10sample/second rate, which means that the peaks it records will still be averages over a 100ms period.

Thanks guys. Doesn't look like either of those would catch a surge. Knowing the duration, and better yet the ramp rate, of the current surge would tell you how much energy was there.

I wonder if I can find one of those meters, either one, used...it'd be to at least know peak current.

FYI - the 150 amp ESC and program cards arrived today. :)

I made a promise to myself that I wouldn't buy anything until my MGT sells... but those are the easiest promises to break...