OK but inside the tappet is concave, so ANY misalignment will reflect in the readings to some degree.
If the numbers don't come out right when you check it or you don't get repeatability, this is where you might first look as a cause.
Try it and see what you get.
Glad it's making some sense!
Glen
--Previous Message--
: Thanks again Glen.
:
: Once again I left out information...
: sorry. I am not putting the indicator
: directly on the cam lobe. I have one
: new lifter that I have thoroughly
: cleaned and lubed with light oil. It
: slides freely in the hole in the block.
: The indicator extension sits inside
: the bottom of that lifter.
:
: Thanks again. After reading your last
: post through I understand better what I
: am doing looking at the opening and
: closing window for intake lobe #1.
:
: Regards,
: Doug L.
:
:
: --Previous Message--
: For the indicator I have an extension
: rod that screws onto my indicator
: giving it more reach rather than
: stacking lifters.
:
: OK but you have to have some way to
: pick up the measurement off the
: (sliding) cam lobe. It would be very
: difficult/impossible to get the
: indicator tip read directly off the
: lobe because it would have to be
: perfectly true and rigid throughout the
: entire check.
: For purposes of setting this cam, you
: only have to be concerned with the
: "phasing" of its motion in
: relation to the crank rotation.
: You can set it up just by opening and
: closing points, or just lobe center
: angle, doing it both ways double-checks
: your work, and also verifies the
: accuracy of the grind.
: Any more questions or anything is
: confusing just ask.
: Others may have more suggestions...
: Glen
:
: --Previous Message--
: Thanks Glen. I am going to print that
: out and study it at length. Frankly it
: sounds like what I did setting max cam
: lift at 110 ATDC on the crank is going
: to be close and confirming it with
: before and after peak checks should
: confirm that. However, I'd like to
: understand the other methods based on
: the beginning and ending intake angles
: so as I said, I will study your reply
: in more depth.
:
: The pushrods I am planning to use came
: out of the retired race engine. They
: are aluminum rods with hard bronze top
: and bottom caps.
:
: For the indicator I have an extension
: rod that screws onto my indicator
: giving it more reach rather than
: stacking lifters.
:
: Thanks again,
: Doug L.
:
:
:
:
:
:
:
:
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