Wow, sounds awesome !
Isn’t the weight saving in the region of 12kg or similar ?
Whats the capacity and spec (cams, CR, etc) and what are you gonna do with it?
I've heard that same number used for MG weight saving.
It seemed a lot as my Al Molnar cases weren't terribly heavy to pack around.
On checking, standard Al. cases are 33 lbs or 14.7 kgs.
Mg is 33% lighter, so if thicknesses were kept the same the weight saving would be about 5 kg .
I recall having a conversation about this with Andy Molnar when I was ordering cases.
Andy Molnar felt that Vincent cases would require some beefing up if done in Mg .
As he pointed out, Vincent cases are not webbed whereas Manx mg cases are heavily webbed to make up for the relative weakness of magnesium.
He figured that the large open Vincent cases should be thickened plus have the webs added if cast in Mg.
By the time all that was done, the weight saving was quite minimal.
Then there is the expansion problem.
As he said " We have a hell of a time holding the bearings in the Manx engine, it's always been that way".
Anyway, he talked me out of Mg, which was available at another supplier at the time.