Re: 502 Mag MPI cam specs
 

I have a new in the box Crane 721 cam that is collecting dust on my shelf that I can make somebody an excellent deal on. Should be good for an upgrade.

SPECS: #139721

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 325 @Valve 553 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 339 @Valve 576
Rocker Arm Ratio 1.70

Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 29.0 BTDC 67.0 ABDC 276.0 °
Exhaust 73.0 BBDC 31.0 ATDC 284.0 °

Spring Requirements: Triple Dual Outer Inner
Part Number 99896
Loads Closed 132 LBS @ 1.906 or 1 29/32
Open 395 LBS @ 1.346
Recommended RPM range with matching components
Minimum RPM 2000
Maximum RPM 5500
Valve Float 6500

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 2.0 BTDC 32.0 ABDC 105 214.0 °
Exhaust 46.0 BBDC (4.0) BTDC 115 222.0 °







May not be much different but may still help somebody that needs a replacement.