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Summit Racing Ford Small Block Engine Build Valve

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Valve-seat contact is crucial to seating as well as cooling. The more seat contact, the cooler valves run because there's more contact area to transfer heat from the valve to the water jacket. The downside is reduced flow. Seat contact is more critical at the exhaust valve.
347ci Small Block Build - Hammer Time! - Part 1

 Valve-seat contact is crucial to seating as well as cooling. The more seat contact, the cooler valves run because there's more contact area to transfer heat from the valve to the water jacket. The downside is reduced flow. Seat contact is more critical at the exhaust valve.  View Related Article

 

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