MustangWorks.com : Ford Forums - View Single Post - Head and intake flow. Something to think about. :)

Jeff Chambers · 03-16-2003, 08:52 AM

A good basic rule-of-thumb is that you want the intake to flow 15% more than the heads so that the intake doesn't become the restriction in the airflow. I've found this to be a pretty good rule-of-thumb for getting the absolute maximum performance out of flow limited heads like we used to be forced to run in S/W. The performance difference between an intake that flows nearly what the heads did and one that had the 15%+ excess was significant.

03-16-2003, 08:52 AM	#4
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	A good basic rule-of-thumb is that you want the intake to flow 15% more than the heads so that the intake doesn't become the restriction in the airflow. I've found this to be a pretty good rule-of-thumb for getting the absolute maximum performance out of flow limited heads like we used to be forced to run in S/W. The performance difference between an intake that flows nearly what the heads did and one that had the 15%+ excess was significant. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"