well, dohc is always gonna beat sohc in every performance aspect. stock engines have valve overlap of some sort. none seal perfectly. with dohc it is possible to elimiate all overlap. with a sohc it may not be quite as feasable. a h22 is gonna produce better numbers than a f22 (dohc and sohc 2.2 motors) same with a b16 and d16. while you can get by with sohc remember you have a smaller head. the dohc motors made by honda are built more for performance and have more "options" such as oil squirters in the cylender walls and better geared trannies.
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