im just curious, how much power could you gain with headers/intake/hotcam if you advance the spark , if im not mistaken you advance until you get knock, then you go back 3-4 degrees? im new to this so sorry if i sound dumb, any how, and when you do advance the spark does it just give you your optimum output or does it take a toll on durability? and along with teh spark advance do you need to add fuel or no? thanks

 

no one?