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One other thing, I don't have a cam card for the 509 cam. The book spec lists the centerline at 108 but you keep mentioning 106? Is 106 the installed center line and if so where did you find this spec?






That cam has a 108* lobe sep. Mp suggests a 106* intake centerline. With 248* duration @.050 the intake open and close events will be as follows.

For Straight up Intake open ----Intake close

108* IntakeCL-----16*BTDC---------52*ATDC 0* SU.

106* ICL----------18*BTDC---------50*ATDC 2* ADV

104* ICL----------20*BTDC---------48*ATDC 4* ADV

102* ICL----------22*BTDC---------46*ATDC 6* ADV

mike