Been thinking about the behavior of the gas flowing down the inlet manifold in to the cylinder (any type of induction).........
When the port closes, the incoming charge has nowhere to go as it meets the piston-skirt/reed-cage/rotary-valve etc. How does the charge behave during this millisecond? does it compress, or rebound, swirl or what.........
I suppose this was the thinking behind boost bottles, though they're universally disregarded as useless bling. If the charge comes back out of the carb mouth (spit back), it's going to cause issues with the mixture strength.
Would having an uninterrupted flow down the manifold improve performance, or indeed does the shock wave caused by the port closure actually help scavenging in the long run (Helmholtz theorem)?
Turbo engines use blow-off valves to keep turbo pressure up and things spinning - is this remotely comparable?
Is there any mileage in the principle of the boost bottle (or variation) if it was developed for this specific application?
Lots of questions - what do you think? ............................
