umm.. JDM b16a2? jdm engines are B16A, B16B.. the B16A2 is a usdm civic si engine.

also, adjusting the vtec engagment point on a stock motor will not give you ANY additional power. they are tuned from the factory to engage at the optimal point. you will just lose torque and acceleration. as someone above said, adjusting anything on a stock motor isnt going to give you 15hp.. hell, bolt ons barely make 15hp.

you telling us that no one here that posts knows anything is pretty funny considering your the one asking us for help..

if you want to get some bs answers like "turn your vtech to engage at 1500 rpms man!! youll gain 20 horses!" then go to honda-tech.com