dyno basics · FF-0473

What is the difference between corrected and uncorrected horsepower on the dyno screen?

The screen shows raw data and recalculates it as it comes through; the corrected figure is shown separately. Reading uncorrected, the earlier pull was 313 at 5,700. Corrected, the engine was at 400 horsepower, and just with the timing change the graph cleaned up and it made 407 at 5,700.

Expert

Robert King

Evidence

measured

Component

corrected horsepower

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