2003 Dodge Ram Hemi Engine Modification - 21st Century Hop-UP
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Swapping heads on a musclecar's small-block or big-block engine has been standard practice for many years. Smaller chamber, bigger ports-more power. But what's it take to do it to a 21st century powerplant? Remember, the engine's functions are controlled by a computer; change something that sends a function out of a given parameter, and the computer is lost. Patriot Performance in Rainbow City, Alabama, has a core-replacement program: you purchase a pair of their CNC-ported heads, they ship them to you, and you send your stock heads back to them. The Stage I heads we received featured the stock valves and springs, five-axis CNC porting, and a five-angle valve job. At .600-inch lift, the intake ports flow 300 cfm, and the exhaust flows 207 cfm at the same .600 inch. View Related Article
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