Now I am figuring out the timing settings with no valve lash so I can time the cams. IO, IE, etc.
The cam card lists a 17 BTDC intake opening with no lash at 0.050 lift. It lists the duration at 0.050 as 258 at .050. Using the formula for a cam with the lobe centered between the ramps, the intake centerline is (258/2) - 17 = 112. This is the intake centerline listed on the cam card.
These cams were digitized by Kibblewhite and the file is input into the "D" program. Note that the intake centerline is entered as 112 just like on the cam card. The intake duration at 0.050 is 258.8 degrees using the IE + 180 + IO formula. This is very close to the value on the cam card.
The lobe tip should be centered between the ramps according to the cam card. The intake centerline based on the opening and closing values from the digital model are (258.8/2) - 20 = 109 degrees. This is not the 112 value. This cam is ground funny, or it is ground correct and the cam card is goofy. I can't win.
That table made last night is based on the digitized cam profiles in the "D" program. It looks like these settings work best. 103-111 when the cams are installed with a new chain, this will go to 105-109 when the chain is half worn, and 107-107 when the chain is worn out. It gives the best trapped mass at lower rpm with only a small loss on top. Keep in mind, these cams with their dingbat profiles might act like ones with wider lobe centers.