Originally Posted by panic
This is always wrong at every point (except 0° and 180°).
Yep, wrong.
But with more math, the crank angle can be calculated. But the math makes my old brain hurt. frown
It's more complicated than sticking a horizontal cylindrical fuel tank to figure out how much fuel is in it. I have a cheat sheet for that, though.

Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.