Is there a jailbreak app that lets me connect to channel 14 Wi-Fi?

So I installed dd wrt onto my router and now I have access to channels 1-14, but my iphone can only connect up to 13.
First question: Is channel 13 going to be faster for me because I'm the only one on my street with access to 12, 13, and 14 even though it overlaps with the lower numbers?

Second question: Is there a jailbreak app that allows me to connect to channel 14?

Added (1). EDIT: My iphone can't connect to 14, it can only connect to the additional 12 and 13.

In answer to your first question concerning speed:

Unless you have other people piggy backing on your Wi-Fi then there will be no difference as far as your local network is concerned. If you are asking about you Internet speed, that is controlled by your ISP.