Perf. Tips Dart Drag Car

74Burntorange said

the heat range is on the threads of the plug...the hook is used for timing. 2-3 threads on the plug means good heat range....4-5-6 means too hot and none means too cold

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Sorry ,your right about the thread thing and the heat range.The threads on the plug are about 1 1/2 or 2 down,so i guess im good.The mark on the hook is right on the 90 .I think this means the timing is good .Is it right on the elbow of the hook ? Its more to the top of the bend than the bottom ,but its on the bend ...