Every car is different even if you take two identically modded B18c engines and Dynoed them the results would be different. In ordere for the VAFC to be utilized to it's max you must dyno the car and have it tuned on the Dyno.

Keep it at the Stock settings for the time being. I used to play around with the VTEC switch point on my Civic but a Butt Dyno is no match for the real thing