Jeez, the guy seems to have forgotten that air supply requirements for any
engine is a factor of rpm vs displacement. Size to WOT, of course, for
gasoline or diesel. However, typically diesel WOT rpm will be much lower than
gasoline(petrol) WOT rpm.

Right?

Butch

David said: But you would need to size vents for full throttle anyway ....
I think we are all guessing so far ....

I'd have thought a "gas" ( petrol in this part of the world ) engine might
have been less forgiving of pressure drop through the vents. Or it might be
something to do with cooling?
David


"Steve Barker" wrote in message
...
It has nothing to do with compression ratio actually. The amount of air
is
increased because a diesel has no throttle blade nor is any measurable
amount of manifold vacuum created. A diesel of say 400 cubic inches uses
the same air a gas engine of 400 cubic inches would if it were run wide
open
100% of the time.