That's a little scary, I think I see that way sometimes.

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

Doug,



Damn near choked on my cheesburger! That is definitely a breakthrough in Y block comedy. Ha!



Mark Hebard

57 Black Tbird 312/auto

Cartoon from 2002 that seems appropriate

Doug T

The Highlands, Louisville, Ky.

Y-Guys      On the stacked design, MAYBE the engineer sneezed while

          he was doing the drawing!   Just joking, a little friday am humor!

                                                Bill

Bill

Pelham,Al

Another advantage to the stacked ports is size.  With side by side ports, you can only make the ports so wide and still fit them between the pushrods.  With the stacked ports, they can fit between the pushrods, and additional port area can be realized by making the ports taller.  Since the ports are quite wide, it doesn't take much additional height to get a sizeable increase in area.  With narrow side by side ports, it takes bigger increases in height to attain much area gain.  This was apparently said by a former Ford engine engineer.

John - "The Hoosier Hurricane"

Though not an expert on intake design at all, my understanding is that the stacked design allowed each runner to be the same length, feeding each cylinder the same A/F charge. 

A small aside regarding this question is the design of the bottom vs. top outlet ports of the later model intakes.  I've noticed that one has slightly rounded corners compared to the other being more squared.  It is subtle though definite and I've noticed the difference on more than one iintake.  Without a manifold in front of me forget which is which.  I'd like to know what the deal is there?

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

I have never come across an explanation why Ford designed the Yblock intake ports this way. Anybody have a theory? Possibly a way to increase runner length to get better low end torque? A similar discussion is going on at another forum regarding the FE manifold design making it part of the cylinder head.

57 Black Tbird 312/auto