intake port molds - Page 4 - ZR-1 Net Registry Forums

tpepmeie · 02-03-2010

Quote:

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.

Quote:

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 · 02-03-2010

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 · 02-05-2010

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

XfireZ51 · 02-05-2010

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

Polo-1 · 02-06-2010

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

TB is 2 64 mm blades plus over sized primary.

LGAFF · 02-06-2010

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

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

02-03-2010	#32
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: intake port molds 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. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 02-04-2010 at 12:01 AM.

02-05-2010	#33
Polo-1 Join Date: Sep 2005 Location: Washington Posts: 955	Re: intake port molds rumor has it, Todd's heads and my intake flowed only 10 cfm less then just my heads alone.

02-05-2010	#34
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,709	Re: intake port molds Where's the choke point? Is it throttle body or plenum volume?

02-06-2010	#35
Polo-1 Join Date: Sep 2005 Location: Washington Posts: 955	Re: intake port molds 2 38mm balls fall all the way down into the heads. TB is 2 64 mm blades plus over sized primary.

02-06-2010	#36
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: intake port molds Not sure how many of these apply to the DOHC cam engines, but.. http://www.wallaceracing.com/Calculators.htm __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359