feiago 8xl getting hot in emaxx

[nitrorube]

ok guys i need some help,im running a mamba max,feigao 8xl,4cell lipo and the motor is getting hot,like 170 with temp gun.my question is im running a 18 pinion and i have all three spur gears 62,65 and 68,how can i get temps down,is my gearing off?do i need a new pinion.i tried the 65 and 68 and the motor still gets hot,i have made a cooling hole in body and i will order the rc monster heatsink which they are out of,anything else?esc is warm but fine and batteries are cool

[lincpimp]

I would say that you are way undergeared.

Try the 62t spur, but that will give you maybe 30mph, and the 8xl should be good for 40 mph. This may help with the heat, but I think that you are at full throttle most of the time with your current gearing. The temps of the esc and batteries seem to support this theory. The feigao motors do not run cool but with proper gearing they are usable and are a super performer for the price!

I would say to buy a 23t pinion, then with the 62, 65, 68t spurs you would have 38, 36, 34mph respectively. That is a decent range of speed to expect from the 8xl. You could also buy a 22 and 24t pinion, that would open up more gearing options.

The heatsink is also a good idea, if only to help hold the motor together.

[nitrorube]

thanks lincpimp i will try that out when monster gets some more , they are out right now,thats not the first time youve helped me out,thanks

[lincpimp]

Originally Posted by nitrorube

thanks lincpimp i will try that out when monster gets some more , they are out right now,thats not the first time youve helped me out,thanks

No prob man, hope that helps the problem. I can only think that the 8xl is just spinning too hard with the low gearing. It is always good to have extra gears, I must have at least 2 doz pinions in my tray. And the ones on the vehicles!

[neweuser]

Is my Motor/Speed Controller/Battery Pack Too Hot? - 02.01.2006, 10:41 AM

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Although not always true, a rule of thumb is:
Hot motor, cool controller, cool batteries = undergeared
Cool motor, hot controller, hot batteries = overgeared
Warm motor, warm controller, warm batteries = happy components

So the theory should be correct. It just seems with 32 pitch, the 18T would be over geared? What diffs are you using?

[nitrorube]

its a new 3905 emaxx with 43/13 gearing i think,hope mike gets some 32 pitch gears in,hes out of 22 and 24 tooth

[neweuser]

I really need to get a grip on that new emaxx! Damn it!

[nitrorube]

no problem thanks anyways,i was wondering will another feigao motor stay cooler like a 7xl or 9xl,i still want a little more top end