Reply to "351c EFI intake manifold"

George PAdmin.

On the subject of 2V heads, the very best ported "iron" 2V heads can support 500 bhp, 450 is a more reasonable expectation for the average porting job. Even with porting & 4V size valves the iron 2V heads hit a brick wall in the intake flow curve at 0.550" intake valve lift.

But its a new world now Doug. The alloy 2V heads made by CHI & AFD will support right around 600 bhp. The intake ports flow well past 0.600" lift, they are a good match for the lift characteristics of hydraulic roller cams. They are plenty for any reasonable street application.

cowboy from hell

12/28/063:24 PM

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