My mind keeps seeing the Harley Davidson heads and the dome chamber with canted valves, single heads for each cylinder on the Corvair, looks to be a way to remove weight, plus a much greater flow volume.I just figured out the bummer about the gm corvaiers, 164 or 145 there always the same weight no matter what the HP. give or take a pound or two. Will Azalea Aviation develope any other type of corvair engine 1/3-2/3 or is the Spyder engine it ?
A few other possibilities, but not much can be done to shed weight.
If a Harley two cylinder can pump out 100 HP.......I'm digging for information?