A2 Grind Cam-Big Twin
descriptionCam bolts into 1966-84 (except 80-81) Big Twin engines with no head work
1980-81 engines the height of the stock H-D valve guides restricts spring travel (and cam lift) to .430" or less
Spring travel and clearance, plus clearance at main bearing boss must be checked on 80 and later models
More mid-range and high-end power; idle unaffected
Grind: A2
Intake Lift at TDC: Shovel: 0,156" Pan: 0,164"
Intake Open: 19°
Intake Close: 43°
Intake Lift: Shovel: 0,450" Pan: 0,470"
Intake Duration: 242°
Exhaust Lift: Shovel: 0,450" Pan: 0,470"
Exhaust Duration: 248°
Exhaust Lift at TDC: Shovel: 0,142" Pan: 0,150"
Exhaust Open: 50°
Exhaust Close: 18°
1980-81 engines the height of the stock H-D valve guides restricts spring travel (and cam lift) to .430" or less
Spring travel and clearance, plus clearance at main bearing boss must be checked on 80 and later models
More mid-range and high-end power; idle unaffected
Grind: A2
Intake Lift at TDC: Shovel: 0,156" Pan: 0,164"
Intake Open: 19°
Intake Close: 43°
Intake Lift: Shovel: 0,450" Pan: 0,470"
Intake Duration: 242°
Exhaust Lift: Shovel: 0,450" Pan: 0,470"
Exhaust Duration: 248°
Exhaust Lift at TDC: Shovel: 0,142" Pan: 0,150"
Exhaust Open: 50°
Exhaust Close: 18°
