question on kc and kr

i have the ls1m and was reading my car and noticed .69 kc and was wondering if that was normal, and what are you o2s supposed to be at

whats kc?

o2s .93 is about what you'd like to see. Lower is lean and higher is rich

when i have scanned my car both kc and kr are dead 0.00 and hardly move, i know its rich to it backfires a little since the new exhaust

KC = Knock Count. There is a criteria for Knock Counts...something like X amount of knock per sec = 1 count, but I can't recall exactly. This means that just because you don't have Knock Counts doesn't mean you won't have KR.

KR won't usually show up until you are in a high load situation...like jumping on the throttle. If you do have 0 KR all the time consider yourself lucky, many GTPs suffer from part throttle KR issues.