I am running 16#'s of boost and getting 3degrees retard is this bad or can I go up to 17#'s? I need to get a knock sensor to tell the severity of knock.
It sounds like you need to look at the reason for the knock ... is it because of leaness? A transitional thing (due to a shift)? Does it get worse if you stay in it?
I wouldn't turn it up any more until you know...