intake port molds

[tpepmeie]

Originally Posted by Paul Workman

It would be very interesting to see some dyno curves with your IHs and then with some slightly bigger (like mine). I'd be willing to lend my IHs/plenum to ya to do just that, but there would be the transition between my 36.xs to your heads' 35s to figure out (epoxy?).

That wouldn't work. My heads are neither 35mm, nor round, at that interface. We're not going to get crazy on the housings csa, but we will knock the injector boss way down, and enlarge the entry. Kevin's mono runner is a cool looking piece, and flows very well, but I'm not going that far.

Originally Posted by Paul Workman

As for the "Big Dogs" not flowing as well as Todd's, (assuming all else being equal in the test) there's got to be some turbulence being developed in their design that is creating some kind of standing wave(s) - effectively pinching off the air flow...would be my guess.

I think it has more to do with my valves, chamber, and short side radius, rather than any particular turbulence in Kevin's port. His heads flow very well.

Todd

[LGAFF]

Pete, I read about it in his book, Sean Hyland also has a website.

http://www.seanhylandmotorsport.com/


http://www.seanhylandmotorsport.com/..._engines.shtml

1998 DOHC 4.6 with secondaries

http://www.karkraft.com/New%20Parts%201165.jpg

5.4 -GT/Cobra R heads

http://www.karkraft.com/Ford%20GT%20heads2.jpg


Twin Port Head
Dimensions (Intake)
Square Port 32mm x 40mm
Oval Port 36mm x 44mm 1999 & Later 4.6L Tumble Port (Intake)
50mm x 39mm 1998 & Later 5.4L Tumble Port (Intake)
59mm x 39mm
All DOHC Exhaust Ports
48mm x 25mm




http://www.karkraft.com/Ford%20GT%20heads2.jpg

Check Border's or Barnes and Noble for the book.

[Polo-1]

rumor has it, Todd's heads and my intake flowed only 10 cfm less then just my heads alone.

[XfireZ51]

Where's the choke point? Is it throttle body or plenum volume?

[Polo-1]

2 38mm balls fall all the way down into the heads.

TB is 2 64 mm blades plus over sized primary.

[LGAFF]

Not sure how many of these apply to the DOHC cam engines, but..

http://www.wallaceracing.com/Calculators.htm