degreeing a slant camshaft with no cam card
Hi Karl, what exactly is the measuring standard of a camshaft,
The measuring standard is whatever the guy who ground it "says" it is. These days, "many?" "most" cam grinders go by similar standards, but not necessarily. I've forgotten "what all" I think the old factory Mopar grinds were rated at just a few thou of lifter movement, where many others were going by .050"
The thing is, you should be able to take the published figures, whether they are .050, just a few thou, or 10 feet, and figure "the middle" of that to get the centerline.
But a far more accurate way is to measure it yourself. Get it in the block with your wheel, and measure an equal amount of lift on "either side" of center, then split the difference to get centerline.
(Come down from max indicated an equal amount of lift on each side of max. Note the degree readings, and "in the middle" is your centerline)
In other words, to set a centerline, you don't need to KNOW anything about the cam, you can measure it.
Now, that does not mean that whatever centerline you've "picked" is either "the right one" for the cam, or for your particular use, as in more top end, or more bottom end.