Among the advantages is a faster burn time of the air fuel mix.
Honda pent roof head.
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Once again the europeans were doing it long before anyone else well before americans even used a hemi head.
The japanese didnt invent the pent roof.
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Various shapes of combustion chamber have been used such as l head or flathead for side valve engines bathtub hemispherical and wedge for overhead valve engines and pent roof for engines.
Long story short theres no debate here.
In engine design the penta engine or penta head is an arrangement of the upper portion of the cylinder and valves that is common in engines using four valves per cylinder.
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Pent roof has emerged as the dominant combustion chamber geometry and is used ubiqutoesly by all automotive engine manufactureres across the board and its.
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Pent roof combustion chambers were also used by chrysler between 1951 and 1958 when it was discontinued due to high costs.