Quote: I'm sure this is a stupid question, but why not test flow at a vacuum level similar to the actual port at wide open throttle? Like 1 inch? WOuldn;t that be a more realistic test of the ports performance in the engine?
When we measure flow on a flowbench, we are measuring at 28" h2o. The vacuum measurements you take at the carburetor are measured in "hg 1"hg is close to 13.6" h2o. When Smokey came up with 28" for a standard he was assuming 2" h2o was the average and converted that number. Keith
