i knocked a good bit with my canned intense tune when it was running really rich. made a commanded A/F ratio change and alot of the knock went away.

if your serious about tuning and would like to keep a check on it at all times, i would get a gauge. you can see what the fuel is doing via tuner, some dont even need a wideband to tune, but its not quite as accurate.

its something handy to keep an eye on.