'64 Dodge 426 Hemi Engine

A New Cylinder Head Design

In the early 1960s Dodge and Plymouth NASCAR teams were regularly getting beat by the competition and to deal with that bad publicity (when Win on Sunday, Sell on Monday was a reality) there was an all-out effort by Chrysler engineers to find the required extra power.

How they did it was to reach back into their engineering from the 1950s and come up with a new cylinder head design for their existing wedge big block engine. Returning was hemispherical combustion chambers on new cylinder heads.  The design featured large valves, free-flowing ports and centrally-located spark plugs for optimum spark.

Soon after its release the new 426 Hemi engine dominated the NASCAR super-speedway tracks, the drag racing scene and today this basic engine design is still incorporated into the billet aluminum nitromethane-fueled powerplants of today's Top Fuel and Funny Car projectiles.

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