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Std vs MG Metro Camshaft

Posted: Mon Apr 08, 2013 11:52 am
by silloyd
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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Enjoy!

Re: Std vs MG Metro Camshaft

Posted: Mon Apr 08, 2013 12:12 pm
by bmcecosse
Well done ! That may help to save someone being 'suckered' in to paying over the odds for a supposed 'MG' cam - when it is not.......

Re: Std vs MG Metro Camshaft

Posted: Mon Apr 08, 2013 12:32 pm
by silloyd
...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) :lol:

Re: Std vs MG Metro Camshaft

Posted: Mon Apr 08, 2013 12:59 pm
by bmcecosse
Hahahahahahahahaha - well done indeed! Bit over the odds for the postage though.... :roll:

Re: Std vs MG Metro Camshaft

Posted: Mon Apr 08, 2013 2:04 pm
by Ratbag
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.

Re: Std vs MG Metro Camshaft

Posted: Mon Apr 08, 2013 4:22 pm
by bmcecosse
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 !