Just curious, in a 454 .60 over with 10.5 to 1 forged pistons, hydraulic roller setup, 4.10 rear, 4 speed, Edelbrock performer RPM, Holley 850.
In the above, what difference would it make using cast iron rectangluar port heads as opposed to oval ports? When should either or the two be used ?
Pros and Cons of each ?
Oval ports have sharp acceleration and more torque Squares do have a place though....on a Camaro that sprays or has been lighten or turns 6500+ like a 427. Chevelles are heavier but a full dressed Camaro ain't all that far behind to justify the squares over the ovals, especiallay street/strip rides. Ovals have more air speed kinda like a garden hose with your finger on it vs. no finger. They only restict above 6500-6700 unless fully ported!! [img]graemlins/beers.gif[/img]
Question from the Riddler,
If square ports are for motors turning over 6500 rpm why did gm put square ports on their 502's with a redline of 5800 rpm and how do they get 502 hp and 502 tq out of the square ports?