[Charles Martel]

Hmmm... sounds like an evolution of the sleeve valve idea. I've wondered if that old design might be worth revisiting with computer-actuated solenoids and such. Effectively infinitely-variable intake and exhaust timing.

[zog]

--if all the cyliders were common and inline, well, like they usually are of course, you wouldn't need that many solenoids, either, like one or two per bank if they were hefty enough. The other way like referenced the old caddy attempt, it was one per valve, with valves themselves always being a compromise because they are round. They add more, make them smaller, still a compromise for the area they want to cover. I think the whole dang head should open and close, skip the valves.