Carb cfm with ported heads?

Krooser said

Read this...a different view on cfm's...

How Big A Carb Do You Need?

Click to expand...

OMG, someone wrote an article that makes sense... LOL

That original computation has been tossed out so often with no regard for the 1.5" vacuum rating. IMO, the original computation was a good gauge of the smallest acceptable carb for an engine.