valvetrain · FF-0015

Why use small-block Chevrolet valves in a Ford Flathead?

Steve compares a replacement Flathead valve with a modern 1.5-inch small-block Chevrolet exhaust valve and explains that the narrower undercut stem improves airflow; he uses the Chevrolet exhaust valves in both Flathead intake and exhaust positions.

Expert

Steve Coppock

Evidence

expert attributed

Component

1.5-inch small-block Chevrolet exhaust valve

Applicable scope

1949–1953-style Ford Flathead valve compared with a modern small-block Chevrolet exhaust valve