|
Flow is shown by the darker curves. Port velocity is indicated by the upper light colored curves, and swirl by the lower light colored curve. At the 600 thousandths it would be lifted to the intake valve passed some 265 cfm on an accurately calibrated bench. No measurable swirl existed until some 350 thousandths lift, but after that it came on strong. The indications here is the Canfield heads will favor a higher lift as it will help low-end as well as top-end power. At the valve lift to be used the swirl was significantly better than most Ford heads, aftermarket on not. Intake port velocity was also good. For an 'as-cast' port the exhaust showed excellent results throughout the lift range and delivered 182 cfm at the 550 thousandths full lift to be used. Also worthy of note is the exhaust ports excellent velocity. This is a major factor toward countering low-speed reversion. As well as a healthy top end, good low speed performance was expected from these heads and that is just what we got. View Related Article
|
|