Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Holley 650 HP flow numbers
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Old 11-19-2012, 10:01 AM
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Quote:
Originally Posted by vinniekq2 View Post
My actual 650 was on a flow bench.It flowed 641 and after installing an 850 base plate it flowed 773cfm,,,now how do we know the flow bench is accurate?a different flow bench might offer different numbers.
What I cared about was improvement,or increases
I agree! Heres a little adition vinnie

Years ago the Society of Automotive Engineers provided a standard for Airflow that's still used today. For 4-barrel carburetors that number is measured airflow at 1.5" pressure drop, or used on a flowbench is 20.4" water. For example a 750cfm carburetor should flow 750 (cubic feet per minute) at this pressure drop. A carburetor has fuel flowing through it which actually displaces some airflow (usually around 8%), so this should actually be flowed with fuel or wet flowed. Tests are not absolute but averages not including, temp, atmospheric pressure, temp, or engine efficiancy

Jester

Last edited by painted jester; 11-19-2012 at 10:14 AM.
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