[Spridgets] engine timing

derf derf247 at gmail.com
Sun Jul 8 10:36:22 MDT 2007


TDC for 1 and 4 is the same.  But, because the cam turns 1/2 turn for
every crank turn, lining up the mark can give you either 4 or 1 ready
to fire.  If the #1 valves aren't both closed, then you have 4 at TDC.
 Turn the crank 360 and you should have 1 at TDC with both valves
closed.  You can also pull the plug and wait to feel compression from
the plug hole to know when 1 is coming up on TDC.


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