Thanks. It is good to know and get confirmation now that a couple of the gauges on the market are reading and displaying the actual knock retard values in degree and not just some random value like another one I've seen. I'm not in the market yet but have been wondering about it myself after seeing a couple similar posts on the subject. It makes certain gauges a much more effective tuning tool, but even just watching the overall advance can still provide a lot of insight.
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