3.7 camshaft Specs
 

Hi guy Have finally had the 2 camshafts read one is a 4bbl one the other is a after market one

-----Advertised.Valve.Timing-----
(1) (2)
.............Intake.Opens ---- 27.2 ---------- 20.7
............Intake.Closes ---- 75.2 ---------- 71.3
...........Exhaust.Opens ---- 63.5 ---------- 70.6
...........Exhaust.Closes ----15.5 ---------- 20.0
............. Duration.................
.....................Intake ----- 282 ---------- 271.9.
...................Exhaust ---- 259.1 --------- 270.6

........Valve.Timing@50...........
.......... Intake.Opens ---- -2.0 ---------- 0.1
..........Intake.Closes ---- 46.0 ---------- 50.7
.........Exhaust.opens ---- 39.8 ---------- 43.4
.........Exhaust.closes ---- -8.2 ---------- -7.2
.................Duration..............

..................Intake ---- 224.0 ---------- 230.8
................Exhaust ---- 211.6 ---------- 216.2
....................Valve.Lift..........
.....................Intake ----- 487 --------- 530
...................Exhaust ----- 487 --------- 498

........Lobe.Separation ---- 114 ---------- 115.3

The aftermarket one looks like they ground it with efi in mind.

Yes just trying to work out why the intake has more duration any thoughts

Anyone got any Ideas why the intake has more duration than the exhaust

If I had to guess, I would say it was due to the extra lift.