OK.. well... the "C" rating is the number they use to lie to you about the amount of current the battery can dump as a multiple of the packs capacity...
Example... a 5300 mah cell that is labeled 20C Continuous, will for little brief period of time dump 106 amps... like for 10 seconds once every 2 minutes... What they REALLY mean is it will dump about 40 amps continuous IF you have decent cooling...
Don't get this wrong... the batteries WILL dump the current... but they will get HOT!!!
Go to
http://www.hackerbrushless.com/ and they will give you good info as far as what you need to get the job done....
I ONLY use Hacker Brushless USA ESC's and motors...
Hacker C50 14 XL w/ACRO 90 ESC
Hacker A60-16m w/ACRO 90 ESC
Hacker A20-22L w/OPTO 30 ESC
Hacker A60-22s w/ACRO 90 ESC
Hacker A30-12XL w/Opto 77 ESC....