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The necessary valve lift depends on the valve diameter. 1/4 the diameter is enough. The journal diameter depends to an extent on how hard you are going to work the engine. For a 'display' engine 0.5" will be fine. If it is to be used for competition a bit bigger might be good.
Finally got around to ordering some material! After a fair bit of scouring around hunting metal shops with no success, I finally ended up on mcmaster.comThough it is a US shop, the inventory is nuts! and still cheaper then sourcing some of the materials in Canada I have come across.So with any luck, I should be able to get my order soon.**********************EDIT.. They canceled my order on me... Not accepting orders unless it is for a business or school.
We do like pictures - and it looks mighty fine indeed. This will be very fun to follow along.
Nice progress Funny to see the 'lines from the 3D printer' on the cylinders - will that be painted or have another kind of finish later ?Per
Following along, quite a substantial engine, nice proportions.