Reply To: ignition timing

[frankr]

The high point on the cam means nothing when using the timing fixture. The high point is only important when setting them by gap (0.020″). The timing fixture sets them by WHEN they open not how far they open. WHEN s the most important, not how far. “How far” only approximates the “when” time. Richard, being a toolmaker can probably explain it better than I can, since he daily works with angles and sines & cosines and all that good stuff.