performance · FF-0468

How much power did Steve predict for the blown ARDUN, and where is its weak link?

Up around 400 horsepower, maybe high 300s, if it reaches the same RPM as the four-barrel test. Steve says that is impressive for 289 cubic inches on a 75-year-old block. He is not worried about the bottom end, with steel billet main caps and a SCAT rotating assembly. If there is a limit he guesses it is the valve train, probably the springs, though he does not expect it to break.

Expert

Steve Coppock

Evidence

prediction

Component

horsepower prediction

Applicable scope

Steve Coppock's supercharged ARDUN overhead valve Flathead, 8BA block, about 289 cubic inches, with a Weiand 177 on the engine dyno at Klein Engines