Somebody chime in here... if memory serves correct, if you fried the cam, you would have no combustion / compression would be effected, ie., you would have no valve lift in intake or exhaust or both.
The oil pressure is driven by the pump with that groove in the camshaft end, through the galleys and bearing spaces. Unless you didn't use enough assembly lube, those surfaces wont just fry...unless the oil pump wasn't pumping or the machine work was really bad and the tolerances were too large to begin with.
It may have had high pressure at start up as everything is still cold and thick and the larger bearing tolerances were pressurized with the thick oil.
Ian is correct, the pressure will come down as it heats up. If you turn the key and it ignights, runs, revs etc, then it is not a fried camshaft.
Unless you have 5-8 psi at idle and the oil light is on because of low idle pressure, I would look elsewhere versus the cam lobes. A quick compression test will answer that question. 10 PSI at idle would be okay on a warm engine, despite wanting more, it wouldn't kill anything for sure.
Oil pump failure, weight of oil, bearing tolerance... those should be your search starts in my opinion.
Anyone else?
QUOTE(adolimpio @ Sep 15 2021, 04:14 PM)
I determined the length of intake and exhaust on one cylinder and cut all according to this
What makes you think you wiped out the cam?