Quote: Guys don't get caught in flow numbers. Port design and shape is a major part of making power. Just because one head flows more air than another does not mean it will make more power. I bet you a spread port head will make more power with comparable flow numbers. Just my
Why would a spread port layout make more power per CFM? We've done spread port heads for customers with good results. But, there's no inherent HP advantage over symmetrical or SB2/P7 port spacing. The original spread-port heads simply minimized the differences in the long and short intake ports of the much compromised BBC design. The big power was more a result of much raised ports, and reduced valve angles. They are still a compromise as compared to a symmetrical head. That probably plays into why there are no spread-port style heads in P/S or cup racing currently. Other than to benefit intake manifold packaging, I don't know why unlike intake ports would be desirable.
