I would imagine that pulling the air from the bottom would help more with scavenging the cylinder than the top but yeah...I can imagine it wouldn't matter. Tha

I would imagine that pulling the air from the bottom would help more with scavenging the cylinder than the top but yeah...I can imagine it wouldn't matter. That all makes sense. Pretty much what I assumed. The compression stroke at #4 is the longest stroke. Then it also has the benefit of the Power stroke at #5 being shorter which will mean it will have the benefit of a short(er) stroke motor on the power (more torque?) during that cycle. The shorter stroke on #1 is desirable since you are using boost (I am assuming Miller cycle here) to control the beginning of compression as opposed to the intake valve. Once the mechanical timing is down I assume it isn't too bad to keep all in line though...but a mess if it gets out.