The Ford Barn

maineSS · 02-02-2012, 01:45 PM

Has any one seen any flathead flow work concerning valve shape and seat angles for better flow? Especially interesting would be wet-flowbench work, if anyone has tackled the problem of making a transparent cylinder for a flathead.

I'm presently working on a Dodge 230 6 for my Power Wagon, and have cast up some transparent heads with resin. Although Ford and Dodge flathead designs have their differences, they also share the problem of shrouded valves and sideways flow. I'm looking to keep intake velocity as high as possible, since the engine is long stroke.

I bought a new OEM intake & exhaust valve, seats, a Manley "Street-Flo" exhaust valve, and one of David Vizard's "Rimflo" valves for testing. The Rimflo was designed especially for sideways flow and low reversion in early Brit OHV engines ("A" series), and showed up to 13% greater flow than "race" valves in that application.

I've heard that one of the board members (Ron Holleran?) published a book on the Ford flathead- is it still available somewhere? Amazon lists it as "out of print".

02-02-2012, 01:45 PM	#1
maineSS Junior Member Join Date: Jan 2012 Posts: 15	Valve Shape & Seat Angles Has any one seen any flathead flow work concerning valve shape and seat angles for better flow? Especially interesting would be wet-flowbench work, if anyone has tackled the problem of making a transparent cylinder for a flathead. I'm presently working on a Dodge 230 6 for my Power Wagon, and have cast up some transparent heads with resin. Although Ford and Dodge flathead designs have their differences, they also share the problem of shrouded valves and sideways flow. I'm looking to keep intake velocity as high as possible, since the engine is long stroke. I bought a new OEM intake & exhaust valve, seats, a Manley "Street-Flo" exhaust valve, and one of David Vizard's "Rimflo" valves for testing. The Rimflo was designed especially for sideways flow and low reversion in early Brit OHV engines ("A" series), and showed up to 13% greater flow than "race" valves in that application. I've heard that one of the board members (Ron Holleran?) published a book on the Ford flathead- is it still available somewhere? Amazon lists it as "out of print".