ivtech

i have base rsx 2006, i-vtech engine...not sure when does it even kick in if at all, how would i notice the change? I thought i read somewhere before i-vtech does not even kick in at all, and you can not feel the difference, but im new, do not know what i am really reading, any insights

i have base rsx 2006, i-vtech engine...not sure when does it even kick in if at all, how would i notice the change? I thought i read somewhere before i-vtech does not even kick in at all, and you can not feel the difference, but im new, do not know what i am really reading, any insights