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head flow
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jeffnil View Drop Down
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Joined: 13 Sep 2009
Location: Ohio Illinois
Points: 73 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jeffnil Quote  Post ReplyReply Direct Link To This Post Topic: head flow
    Posted: 28 Sep 2010 at 10:22am
Was wondering if there is any difference in head flow from the factory in a 3500 engine (220) compared to a 3750 mark 11(7080).
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20979 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 28 Sep 2010 at 12:19pm
As far as I know, there was never any change to the intake or exhaust runners. The "deck" (bottom) of the head is .100" thicker on later castings, which began with the 3750 engine and was then trinkled down to all other 3000 series engines. The very last 8000 series cylinder head fits right on an old D21 with no issues.
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