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Old 04-26-2012, 01:52 PM   #39
Pampered-Z
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If the dot on the crank it at 12 O'clock your at TDC FOR BOTH #1 and #6. Remember that the crank goes two revolutions to complete a cycle, and the cam goes one rev for the cycle. The first revolution is intake/compression (IGNITION) then second revolution is power/Exhaust. If the cam dot is up your on the #1 cylinder ign part of the cycle, if cam dot down you on #6 ign cycle.

BUT, that is only really important on a conventional SBC where the distributor can be installed in various positions, and you want to be on #1 TDC/ignition so that you can get the distributor properly oriented ( Basic timing is pointing the rotor at the #1 spark plug).

Since the opti only goes on one way – as long as the dots match up, your opti will get installed correctly.
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Last edited by Pampered-Z; 04-26-2012 at 01:53 PM. Reason: Speelin, grahmer, punkuation
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