esc question

[tree98]

I'm building the bloody wonder and using this motor http://www.altitudehobbies.com/suppo-2217-7-1250kv-brushless-motor-park-425-equiv?search=Suppo 2217/7 1250kv Brushless Motor (Park 425 equiv.) &description=true

The build says to use this esc,but it's out of stock http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=2163&aff=247441

Is there any reason I wouldn't want to use this one instead?http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=37778

I'll probably be using this battery http://www.hobbyking.com/hobbyking/...y_1300mAh_4S_20C_Lipo_Pack_US_Warehouse_.html

 

[xuzme720]

As long as the ESC you pick can supply what the motor can draw, you will have no problems. Powertrain setup is on a supply and demand basis. The motor and prop will determine the current draw or "demand". The rest of the system just has to meet that demand or "supply" it.
For example; the motor/prop combo you decide on draws 13A (this is just an example, I don't know what you are actually drawing since you don't have the prop size listed). As long as your ESC and battery can supply at least that with a small safety margin, you are safe in using those components.
If you have a draw of 18A, a 15A ESC isn't going to work very long. You'll need an ESC that can supply at least 20A and I would probably step it up to a 25A if I didn't have good cooling for the ESC. Then you also need to make sure the battery can supply what the ESC can draw, so on a 25A esc, I usually have a battery that can supply at least 30A. If weight is an issue, you can tighten those up a bit but for heat and longevity, a wider cushion is desirable.