I am open to correction, but don't you need brushless ESCs?
Here is a 30 amp brushless ESC. Also I'd suggest carbon Fibre props, more durable and less likely to explode midair.
This motor's test: 8x4E - 14.8v - 222W - 15A, shows it pulling 15Aout of 17A limit with 8x4 on 4s.
You probably...