59AB block factory relieved

[Ol' Ron]

Bruce

Take a look at the combustion chamber of the Lycoming/Cord engine. To improve flow they run a rocker arm on the valve to straighten out flow. Yes it's a Flathead

 

[Bruce Lancaster]

Thems is serious rich peoples' flatheads! There was also a Pontiac Oakland flathead V8 with valves essentially sideways...

 

[Tim Ayers]

Bruce

Take a look at the combustion chamber of the Lycoming/Cord engine. To improve flow they run a rocker arm on the valve to straighten out flow. Yes it's a Flathead

Plus the supercharging didn't hurt things either!

 

[rotorwrench]

Flow of a gas is very similar to flow of a liquid. It's just a lot less viscous but it still don't like to turn without slowing it way down. The straiter the shot the better. The size of the port even has less of an effect by far than makeing a turn does although a bigger port would allow more cfm but the little engine can only pull so much cfm anyway unless like Tim says you force feed it.

Kerby