help identify this cam
Specs:
Part number: 23-758-9
duration @ .050" 275/275
lobe lift .4167"/.4167"
lobe separation 108
gross lift .625"/.625"
valve timing at .020"
Int OPEN 43 BTDC CLOSE 83 ABDC
Exh OPEN 79 BBDC CLOSE 47 ATDC
There are two ways to list the lift of a cam. Lobe lift and Valve lift (gross lift).
The lobe lift is how much lift the lobe of the cam has. Take that and multiply it by your rocker arm ratio to get the valve lift.
So in this case, you take the .4167" and multiply it by the stock rocker arm ratio of 1.5:
.4167 * 1.5 = .62505" or .625" lift at the valve.
If you used a 1.7 rocker arm ratio it would be:
.4167 * 1.7 = .708"
