I like my old school knock gauge easy to see during high speed passes in 5 years and 20-25 lbs of boost I have never had to replace head gaskets ! Any time it climbs to the last yellow I get off the throttle when they work they are pretty accurate of course there are variables with fuel delivery,octane,timing and boost it's a simple gauge that has saved my engine many times
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So yours goes back down? Or do you reset it to green? Mine never Goes back down
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