stepped pistons or flat top pistons

plow boy · Jan 15, 2009

What the difference between stepped pistons and flat top pistons

Janicholson · Jan 15, 2009

Flat toped were usually the sea level variey of piston. Stepped head means that portions of the piston tops are raised into the combustion chamber, reducing the volume, increasing the compression. Today's fuel is better in octane than that of the fifties and before. The compression can be raised to about 150psi with stepped head pistons and still run unleaded regular. (great question) JimN

stepped pistons or flat top pistons

plow boy

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Janicholson

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