Hello Phil,
i went thru this.. and tried to get it exactly right, taking a
few DAYS as i worked only for about 10 minutes at a time and
thought about what i was doing and what the GOAL was... this is
MY experience..
when they say align the timing marks .. that is LINE THEM UP!
TDC! you are calibrating the photo eye's position so that the
spark would ignite with the shortest distance from the rotor to
the cap... .. make absolutely SURE that the rotor points is
pointing DEAD CENTER on the "plug wire outlet thingy" too!
the above step cannot be accomplished without disturbing the
present timing!!!!!!! your goal is to have everthing LINED
UP!.. rotor, cap and TDC. can't emphasize this enough!!!
when everything is good there, then slowly rotate the photo eye
clockwise (since A series engines rotors turn anti-clockwise)
until you get the "SNAP" from the plug wire. do it a couple of
times until you are SURE you are just catching the leading
edge, then tighten everything about the photo-eye securely...
only AFTER you have done these things should you attempt to set
the timing, either statically, by rotating the whole
distributor and looking for the snap, or dynamically with the
timing light...
the car WILL run if the eye is out of place but your ability to
set the timing could be impaired because the vacuum advance
unit could interfere with the oil sending unit hose (don't ask
how i know).. ..
remember the goal is to get the shortest distance between the
rotor and cap to have the shortest possible spark!
As to WHERE to set the timing, and the effects of cam profile,
.. these things are beyond my (very) limited knowledge.
--
Best regards,
Bill mailto:pythias@pacifier.com
"66 Sprite
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