Valves

[LukeR94]

Talk to me?

Why does 4vpc(Valves per cylinder) have more benefit than say 2vpc, and 6vpc?

For the sake of arguments lets leave VVT engines of this.

Say you are running a solid cam profile with no VVT, what are the benefits of using 4vpc over 2vpc, and why are some engines 5vpc if 4vpc is the most efficient(by that I mean in terms of area, and not MPG etc).

[LukeR94]

Thanks everyone, It is as I expected, mainly due to the surface area of the valves.

The valve bounce thing however I did not know!

Thanks again, everytime, PH has the answer.