Whta can I expect to come fropm tuning my car with something like crome, or neptune? My car is a naturally aspirated d16, intake and exhaust. Should I expect any gains at all by tuning it myself?

 

unless you get really lucky.. probably not. learn how the timing and fuel maps as well as software work before you start making changes.

or

try and find yourself somebody who has some kinda experience tuning and has alot of patience so you can pick there brain.