well, let me give you a little background info. first i changed the spark plugs in my silverado and gained a few psi, centrifigal supercharger. so i thought i should change then on my sub, but its a sidemount old style magnuson, so i was looking at it trying to decide if i was gonna take the super off or not and i loosened one worm clamp then decided to just become stretch armstrong and snake my hand up in there and changed them. but i forgot about the worm clamp. till a few days later when i was trying everything i could think of to find out why my truck was runnig like garbage. including changing back to the stack stat. i noticed the clamp.
well now i have my new tune and im knocking like crazy. this is my family hauler so i drive it alot and cant have this. so i added like 3 bottles of octane booster to the tank. i think it helped some, but whenever i step on the gas and it passes 3 psi it lets out a string of knock. its wierd that i can boost 1 or 2 but not 3. and also if i just nail it its fine