Quote:

Quote:

Last time with W5s it was 555hp ,460tq.

Today with Chapman W9s it made 606hp, 490tq.

Same bottom end, camshaft and carb. Peak power and torque were 500rpm higher with the W9s.

How does this sound? 422" X block.

Just out of curiosty was that on a engine dyno or chassis dyno? Either way that is a good gain



Dynojet chassis dyno.

What is the conversion factor to figure crank hp?