okay, I know it's a moot point for me with the aussie head, but I was thinking about this the other day.
The big disadvantage of the log is the leaning out of outer cylinders due to fuel starvation right?
Well centrifigal chargers (super and turbo) compress the air internally and then push the compressed air into the log. It is still conceivable that there will be some boost loss in the ends of the log as the charge air expands to all the corners.
Now look at PD superchargers. THey do not compress the air internally, but rely on pumping more air into the plenum then can be used at the time, thuse creating pressure and compressed air/fuel mix that is then feed into the cylinder. Since this system relies on the restriction of flow, and basically fills the plenum, there should be even pressure through all cylinders.
Now I know I'm simplifing the fluid dymanics some, but this does pose the question, is the PD charger better in theory, however slight?
Slade
The big disadvantage of the log is the leaning out of outer cylinders due to fuel starvation right?
Well centrifigal chargers (super and turbo) compress the air internally and then push the compressed air into the log. It is still conceivable that there will be some boost loss in the ends of the log as the charge air expands to all the corners.
Now look at PD superchargers. THey do not compress the air internally, but rely on pumping more air into the plenum then can be used at the time, thuse creating pressure and compressed air/fuel mix that is then feed into the cylinder. Since this system relies on the restriction of flow, and basically fills the plenum, there should be even pressure through all cylinders.
Now I know I'm simplifing the fluid dymanics some, but this does pose the question, is the PD charger better in theory, however slight?
Slade