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Ol' Ron · 08-11-2010, 01:44 PM

I did some Flow work on the modified port in my book and saw very little improvement over just shaping it similar to Mike Bishops work. I square up the side of the port nearest to the block eng leaving aprox. 1/4" gasket surface. What surprised me was how well the exhaust flowed in comparison to the intake. Well within the 80%.

08-11-2010, 01:44 PM	#142
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: Boring a flathead I did some Flow work on the modified port in my book and saw very little improvement over just shaping it similar to Mike Bishops work. I square up the side of the port nearest to the block eng leaving aprox. 1/4" gasket surface. What surprised me was how well the exhaust flowed in comparison to the intake. Well within the 80%.