airflow · FF-0142

Why do stock Ford Flathead exhaust ports flow so poorly?

Steve shows that exhaust leaving a stock Ford Flathead has to make a series of 90-degree turns, then runs into a flat shelf he calls a dam, with rough casting and no contour. Porting can smooth and radius the exit, but he says the shelf stays.

Expert

Steve Coppock

Evidence

expert attributed

Component

exhaust ports

Applicable scope

U.S. Ford Flathead V8 block, as compared with the French block