Quote:
Originally Posted by Muffo
When your engine is running it advances the timing as the revs go up. the numbers represent how many degrees before tdc it fires at. down the bottom is the revs and up the left hand side is the manifold pressure. The higher the load on the motor and the higher the manifold pressure the less timing advance can be used. If that makes sence
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Correct.
This chart is only useful to those who have stand-alone timing management or piggyback tuners.