Some photos of the two side by side...for interest. The first four are taken with the shafts rotated 90 degrees each time.
(Original at the top [2 x 1/8" raised rings after first lobe], MG Metro at the bottom [1/4" groove after first lobe])
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Last two taken in one position from the ends:
(Original on the left)
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(Original on the right)
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...and just to show that there are bargains still out there, this one was advertised on the bay of fleas as a "Classic Mini Camshaft" with the description "A Classic Mini Standard Camshaft (Slot Drive)", "Removed from a 1275cc A+ engine"
I went by the picture rather than the description and it cost me 99p (plus £7.50 p&p)
If anything, the 'MG metro' cam in the pictures has fractionally lower lift, greater duration and lower ramp rates than the std., probably making for better torque.
Why do you think that? The lift is exactly the same, the durations are indeed longer (that's the advantage) - and the ramp rates therefore must be faster to open the valves sooner, and close them later - than the AEA300 cam. It was a cam designed to give power up to 6000/6500 rpm - using timing from the inlet of the 2A948 cam, and from the exhaust of the 731 cam (for good scavenging) - and thus was intended to nicely power the MG Metro without encouraging the owners to over rev the engine !
