[DeTomaso] High Ported Iron Closed Chamber 4V head flow results
michael at michaelshortt.com
michael at michaelshortt.com
Sun Feb 9 18:57:21 EST 2014
Not sure why the Jet engine was used as an example, those S shaped port
directors in those engines are designed to slow the air down by several
hundred miles per hour before it enters the jet engine.
SST and SR71 did too.
Why would you want to slow down your fuel air mix? Performance items like
Blowers and Superchargers are used to increase the speed and pressure to
attain greater performance.
I don't get why that was an example.
Michael
On Feb 9, 2014 6:47 PM, "Sean Korb" <spkorb at gmail.com> wrote:
> I'm not sure if this is germane but I am utterly fascinated.
>
> http://speedtalk.com/forum/viewtopic.php?t=4785
>
>
> On Sun, Feb 9, 2014 at 5:55 PM, Charles Engles <cengles at cox.net> wrote:
> > Dear Dan,
> >
> >
> > You wrote: "....and shear vanes screwed into the intake
> port
> > floors."
> >
> > For the amateur engine builder, what are shear vanes?
> >
> > Very curious, Chuck Engles
> >
> > -----Original Message-----
> > From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Daniel C
> > Jones
> > Sent: Sunday, February 09, 2014 4:24 PM
> > To: POCA list
> > Subject: [DeTomaso] High Ported Iron Closed Chamber 4V head flow results
> >
> > A while back, Dave McLain flowed a set of old iron closed chamber 4V
> heads
> > with the 1970's Pro Stock style high port exhaust plate and shear vanes
> > screwed into the intake port floors. I thought I'd share the results.
> > Flowed on a Super Flow bench. Tested at 10" and converted to 28". 2.19"
> > intake valve and 1.71" exhaust. Completely stock combustion chambers.
> >
> > Lift Intake Exhaust
> >
> > Inch CFM CFM
> >
> > 0.025 15.9 10.2
> >
> > 0.050 33.2 28.5
> >
> > 0.100 65.6 60.0
> >
> > 0.150 100.6 89.0
> >
> > 0.200 137.8 109.8
> >
> > 0.250 167.6 124.1
> >
> > 0.300 195.8 141.4
> >
> > 0.350 224.0 155.4
> >
> > 0.400 245.6 166.8
> >
> > 0.450 261.4 176.7
> >
> > 0.500 278.8 185.3
> >
> > 0.550 289.7 194.7
> >
> > 0.600 300.9 204.2
> >
> > 0.650 312.1 215.2
> >
> > 0.700 322.0 225.8
> >
> > 0.750 325.7 234.4
> >
> > 0.800 307.8 239.7
> >
> > Not too bad for 1970's small block cylinder heads.
> >
> > Dan Jones
> >
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>
> --
> Sean Korb spkorb at spkorb.org http://www.spkorb.org
> '65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera #1382
> "The more you drive, the less intelligent you get" --Miller
> "Computers are useless. They can only give you answers." -P. Picasso
>
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