02-25-2011, 02:32 PM
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CC Member
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Join Date: May 2006
Location: Concord Twp.,
OH
Cobra Make, Engine: Everett-Morrison 427SC 302 smallblock. 431 stroker in the works, tremec 3550
Posts: 200
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Not Ranked
The easiest way to find TDC on #1 is to rotate the engine with the sparkplugs removed and your thumb over the plug hole until you feel compression leaking out. Then turn the engine until your timing pointer is at "0" degrees. Assuming your timing pointer is accurate, this will be TDC on #1 cylinder. You can "bump" the starter, but I prefer to turn the engine by hand. Just be sure to turn the crankshaft the direction it normally turns while running.
A four stroke engine revolves twice to complete it's four cycles.(Intake, compression, power, and exhaust.) All eight cylinders will complete their four cycles in those two rotations, so after finding #1 TDC it is easy to find TDC on the other cylinders by rotating the crank 1/4 turn for each cylinder, in the order of the firing order. This TDC will be on the top of the compression stroke for all eight cylinders.
I hope this makes sense.
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