It's been a while... but I've scheduled to get some machine work done Sunday! It's just to fit the sleeve to the block and to make the small-end of the rod fit the FS40 piston pin, but it's SOMETHING.... Bathroom remodels and that pesky real life keep getting in the way, so I'm happy that I'll finally have something CUSTOM to hold in-hand and analyze.

Oh, and I've been thinking alot lately about all the different valving designs I've contemplated. I'm pretty sure I'm going with the slotted sliding design with the centered glow plug. I'm currently contemplating making the cylinder head a larger diameter than the bore to allow more room for the valve opening. Since it will be flat and I can make the piston come all the way to the top of the sleeve, I can expand the squish chamber to the side instead of up, gaining some valve area on the outside where it counts most.

One down-side of the valve design I've chose is I have to choose between an equal number of intake and exhaust slots, or having them differ by 2. The more slots, the harder the whole thing becomes to manufacture and also I lose valve opening area to allow for sealing area for each opening, so I've been throwing around 5/7 and 6/6 which makes 30 degree slots. 5/7, makes for an intake/exhaust ratio of .71 which I've read is too low for supercharged engines - it's more of a number you'd want to make more torque at the low end on a normally aspirated engine. From what I can gather, numbers closer to .9 are better for higher revving supercharged engines. These are the things that keep me up at night.