It is pointless to connect the cn2 header to a usb or serial interface to datalog unless you have the proper software to datalog & tune with along with the hardware to emulate live to the ecu.

You are better off buying a Hondata s300, neptune rtp or ectune rtp system which includes all of the hardware/software in one bundle.

Even after purchasing all of the hardware/software you still need a wideband oxygen sensor gauge along with tuning experience to really get everything dialed in properly.

You are best off taking the car to some one who does it every day to have it tuned.