performance · FF-0389

How much power does Steve expect from the ARDUN engine on the dyno?

With a single four barrel and no supercharger, about 300 horsepower somewhere between 5,500 and 6,000 RPM, well above a regular Flathead. With the blower he expects to be limited to 3 to 5 pounds of boost by the compression ratio, and to end up close to 400 horsepower. He gives the engine as about 290 cubic inches.

Expert

Steve Coppock

Evidence

prediction

Component

power prediction

Applicable scope

Steve Coppock's supercharged ARDUN overhead valve Flathead, mocked up before its dyno test