Make sure you upgrade your esc if you have not done so already. Stock 20A esc will not be able to handle the new 5200KV motor. If you use the stock battery which is 1000mah 2s 15C meaning it is only capable of supplying 15 amps which will not meet the demands of your new turbo ace. if you use a 20C 2s 1000mah lipo you will then be able to supply 20Amps to your load...but the problem again is your ESC...it is rated for 20amps max...you may be able to get 25-30 amps for minimum of 10 seconds before your esc fries...also not to mention that your integrated bec will be starved of current because the entire 20A range will be used up on the stock ESC...and therefore you will suffer brownout.
In case you have not yet done so, I would recommend upgrading to 30amp esc to cover your concerns, with external ubec to avoid brownouts.