Reply to "Solid Flat Tappet Street Cam"

Grinder: Bullet Cams
Intake: Lobe #F285/355
Exhaust: Lobe #F295/358
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285°/295° advertised duration
290° average duration
Exhaust valve opening = 85° BBDC
Intake valve opening = 30° BTDC
60° overlap
Exhaust valve closing = 30° ATDC
Intake valve closing = 75° ABDC
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250°/260° duration @ 0.050
0.585"/0.590" net valve lift (0.029" lash)
115° lobe separation angle (camshaft degrees)
Intake lobe mathematic centerline = 112.5° ATDC
Exhaust lobe mathematic centerline = 117.5° BTDC



Ford 351 Cleveland solid flat tappet street & road race cam
Grinder: Bullet Cams
Lobes:
Intake #FF280/371 (Asymmetric)
Exhaust #F292/373 (Asymmetric)
110° ATDC intake lobe mathematic centerline
115° BTDC exhaust lobe mathematic centerline

280°/292° advertised duration (286° average)
251°/263° duration at 0.050"

Indicators
29°/29° major intensity (advertised duration – duration at 0.050)
Overlap at 0.050” = 32°
Lobe separation angle = 112.5°

0.371"/0.373" lobe lift
0.022”/0.019” lash
0.642”/0.645” theoretical valve lift (1.73:1 ratio)
0.620”/0.630” net valve lift [(lobe lift x 1.730) – lash]
0.609”/0.615” factual valve lift [(lobe lift x 1.70) – lash]

EVO = 81° BBDC
IVO = 30° BTDC
Overlap = 61°
EVC = 31° ATDC
IVC = 70° ABDC