Quote:
Originally Posted by Tod
I was thinking about using the dipped design of the center exhaust port on the 2 ends as well. I'm going to try to keep the exhaust ports close to original right under the valve, but try to smooth out the flow some and get rid of as many sharp angles as possible. I just don't see the sharp corners helping exhaust flow. Since the area of the port diameter where the exhaust manifold bolts on is about 1.5 square inches, if I can keep the port no less than that all the way through, it should do nothing but help flow. More "direct" and less turning.
Tod
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Tod your idea on the exhaust port flow is exactly how the French flathead blocks were cast. The French block has a number of design improvements similar to what you and others have mentioned. Maybe someone could loan you one of those blocks so you could see these improvements first hand.
Ron