degreeing a slant camshaft with no cam card

1930 said

I think some clarification might help. MY FSM reads

Intake opens ( BTC ) Does BTC stand for Before top dead center?

Intake closes ( ABC ) Does ABC stand for After bottom dead center ?

Exhaust opens ( BTC ) Does BTC stand for Before top dead center ?

Exhaust closes ( ATC ) Does ATC stand for after top dead center ?

Is the 4 relative corners I have printed on the degree wheel correct?

Click to expand...

Yes.

The factory manuals shorten the abbreviation and leave out the "D" for Top "Dead" Center and Bottom "Dead" Center. Then the first letter designates either BEFORE or AFTER.

ABC = After Bottom Center
BBC = Before Bottom Center

ATC = After Top Center
BTC = Before Top Center


Most of your statements above are correct accept the one for exhaust opens. Exhaust opens before BOTTOM CENTER, not TOP CENTER. BBC vs BTC. It gets more confusing when you try to shorten the abbreviation to three letters vs four.... :banghead: