you cannot chip an OBD2 K20 ECU.

you need to get Kpro, because whether you go boost or not, youll need it to do any upgrades short of bolt ons.

I would do Kpro $900 through me, retail is $10000
I would do a set of RazCams, he has some camshafts and valvspring package that makes 30whp.
if you want to go turbo, if your car is at my shop, thats going to be TOUGH. not alot of room, although it can be done.

I would look into Kpro, you can gain some power with Kpro so it isnt a waste of money