francisjohn
Active Member
I'm confused regarding the port timing on the G4 cylinders (specifically the open transfers)
I have done cylinders in the past that have closed transfers. Using a degree wheel is super easy on these, right as the transfer port is a hair open, right down the opening degree and calculate your duration.
With the open transfers what is confusing is the two transfers (primary and secondary) are at different heights. I'm confused on how do you calculate port timing when you have two different transfer durations
It ends up seeping into problems calculating your blowdown (Transfer opening ATDC - Exhaust opening ATDC = Blowdown)
Is there some sort of formula I don't know about?
I have done cylinders in the past that have closed transfers. Using a degree wheel is super easy on these, right as the transfer port is a hair open, right down the opening degree and calculate your duration.
With the open transfers what is confusing is the two transfers (primary and secondary) are at different heights. I'm confused on how do you calculate port timing when you have two different transfer durations
It ends up seeping into problems calculating your blowdown (Transfer opening ATDC - Exhaust opening ATDC = Blowdown)
Is there some sort of formula I don't know about?