performance · FF-0283

How much power did the supercharged Flathead make before the pulley change?

290 horsepower corrected, 268 uncorrected, at about 5,200 rpm. Robert King says that changing the ignition timing cleaned up the dips in the power curve, and after reading a spark plug he judged the timing to be where it needed to be. A repeat pull gave 290 again.

Expert

Steve Coppock

Evidence

measured

Component

dyno result

Applicable scope

Steve Coppock's supercharged 8BA-style Ford Flathead V8, about 290 cubic inches, on the engine dyno at Klein Engines