Part numbers and phase numbers
You will see that each camshaft has a Part No and Phase No.
The Part Number designates the make and model/the duration period of the inlet camshaft/the valve lift of the inlet camshaft and whether the camshaft profile is hydraulic.
So if we look at the Ford 1300/1600 CVH RS Turbo XR3i XR2 Camshaft Data Sheet we see the following:-
FORC – Specifies the make and engine type
260 – Specifies the duration
420 – Specifies the lift on the inlet valve
H – Specifies that the camshaft is designed for hydraulic cam followers
PH2 – Specifies the type of use the camshaft is recommended for
Info on Camshaft Material
Camshaft Material, i.e.: what the camshaft is made from is the most important detail in stopping premature wear of performance camshafts.Discover more about the different camshaft materials