Big Block Ford Cylinder Heads
“Blue Oval” big block performance is alive and well at Air Flow Research with a much needed clean sheet redesign of the aging BBF cylinder head. Starting with the needlessly large OEM port our design team decreased overall runner size while giving it a more consistent cross sectional area. This change is designed to increase peak power while notably boosting the torque, responsiveness and fuel efficiency. We then carefully shaped the combustion chamber and positioned the valves to compliment intake and exhaust port design while efficiently utilizing the cylinder bore. The improvement in valve positioning allows us to address the “Achilles Heel” of the BBF head, the exhaust port. By filling the floor of the exhaust port without raising the height we have improved high flow lift while increasing flow at low and mid lifts, achieving a 75% intake to exhaust flow ratio with our exhaust port in the stock location reaching 275 cfm. The high flow stock exhaust location allows for stock header and chassis fitment, but for customers with more room AFR offers their BBF cylinder head with the exhaust port raised .250”. Detailed information on the various versions of the AFR BBF cylinder head can be found online or in our catalog.
Phone: 1300 350 351
Fax: 1300 350 454
661-257-8124
Web: www.fabre.com.au
Email: info@fabre.com.au
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