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Originally Posted by Libor
Very late closing timing of intake ports could push quite large portion of fresh mixture back to intake allowing for more load and effectively make atkinson cycle with uneven compression - expansion, but we know that piston engines doing this are using high static CR, not option for rotary...
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The only option for this on a Rotary would be to add a roots-type supercharger. I thought about adding a supercharger and converting my rotary to diesel a while back, but then I realized that the fuel system development alone would break my budget.
I actually gave thought to the late port close while I was doing my 4-port, I was hoping that the later close that the 4-port has over the 6-port would work to my advantage in the mileage department, but I think that whatever I gained there I gave up in 35% intake runner size increase, polished intake runners, swirl-ported irons and polished rotors.
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1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
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