Reply to "351C cylinder heads, open chamber vs closed chamber"

fireandisisMember

George:
In your initial post, I understand you to say that the open chamber head results in a less complete burn due to the lack of "squich" as compared to the closed-chamber heads. This unburned fuel then results in increased hydrocarbon emmisions, "which is why Ford switched the 4V Cleveland motor from closed chamber heads to open chamber heads in 1972."
I must be missing something as why would they change to a design that increases emmisions?

Thanks - Mike
'74 L 6328

1/22/068:26 AM

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