Its been 24 years since I've done this so bear with me. Timing LHS cam, Dougherty SC cams on '86 930. Yes, I have the LHS cam in the left cam tower
Crank at Z1 (the second of the two close together pulley marks when rotating clockwise to pass the TDC notch). Set the cam with dot and Woodruff key at the top, "930" at the bottom. Pin in sprocket, idler arm and chain tight, intake #1 in and adjusted. Verified nothing moved. Checked at dozen times, I'm at Z1, cam aligned as described above, rocker foot adjusted right, dial gauge on the valve retainer lip.
Now, Wayne's book says it s/b starting to open not long after I start turning the crank, but I have to go almost 360 degrees before there is any movement. Valve doesn't start to move until about 5 BTDC or 355 degrees of rotation. At TDC I'm at 0.0737mm or 0.0029" Is this right?
Then, I reach 1.8mm or 0.0709" of lift at about 25 ATDC. That is, almost exactly the same distance the BTDC mark is before the Z1, except after Z1. Way, way before I'm at TDC again.
My maximum lift is 11.303mm or 0.445" at about Z1 + 125 or 25 ATDC cylinder 6/3.
I'm very confused. What am I not understanding or doing correctly.