High CFM heads - What would you chose?

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LOL...I number ALL my rocker stuff just like you do. I thought I was the only AR guy on here!!


I spend a lot of hours setting up my rocker gear as I’m
Sure you do too. It makes it so nice doing an emergency repair at the track knowing exactly what goes where. Harbor freight tool and 5 minutes to mark things.
 
I don’t believe in the this bench flows low or this bench flows high excuse. I stupidly had a flowbench (orfice 6 motors) that took readings at 10 inches of depression and converted them to 28 inches and had a flow tube to calibrate it. Well I was getting into porting for customers and didn’t trust the conversion so I kept it but bought a Quick Flow 400 flowbench (pilot style bench with fluid manometers). That bench had a single big azz blower driven by a 5 horsepower motor. I hated that bench as the fluid manometers changed ever hour. To convert flow numbers you had to take a reading at every .100 (example.06, 1.30, 1.84, 2.3) and convert it to a flow number. Then you were supposed to favor the readings based on temp, humidity, etc, when the test was taken. Loud, non user friendly, and inaccurate. So I took the best of my first bench and upgraded it to 36 inches of depression capabilities (8 motors) and easily checked for calibration with an orfice plate. The bench varies maybe and I said maybe 3 cfm all year. At the very least give the customer before and after numbers.


Does high/low humidity not change it ?
 
Does high/low humidity not change it ?
If I understand your question right...No matter what...you have x amount of air at inlet vs x amount at pressure depression/pressure source, it takes the percentage diff and corrects it to 28 inches no matter if its 26 or whatever.

Edit just read back and yellow rose already answered it.
 
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That will be interesting what offset will you be setting the rockers at ? And I thought he bigmouth was as far as you could go on ede heads , good luck with the heads can't wait to see final results . Whjat will you call them ? biggestmouth heads?



Rockers are .550 offset. A buddy that has a Bridgeport helped me relocate the manifold bolt holes over to the Indy intake that I am going to use bolt pattern. The new pushrod holes hit the old pattern. They are flowing a touch over 325 cfm as they sit right now. There may be a few more left.
 
Rockers are .550 offset. A buddy that has a Bridgeport helped me relocate the manifold bolt holes over to the Indy intake that I am going to use bolt pattern. The new pushrod holes hit the old pattern. They are flowing a touch over 325 cfm as they sit right now. There may be a few more left.
hat is pretty damn good for an ede head ,working on your own . Impressed , feel like i wasted money on the bigmouth heads now seeing as you are getting better numbers
 
hat is pretty damn good for an ede head ,working on your own . Impressed , feel like i wasted money on the bigmouth heads now seeing as you are getting better numbers


I keep saying I will never do it again but we shall see how it goes. The first set of custom Harland Sharp I order were .350 and that didn’t give me enough offset so I’m sure I’ll do another set with a smaller port entrance to use those up
 
Would you share some more pictures and info on those heads please?

Rob I don't have many photos, just didn't think about taking many. I was concentrating on fitting and assembling everything.

The intake ports are 230cc, exhaust 87cc and the chambers are 70cc. The heads were flowed using a 4.030" test stand. My engine is 4.090" bore. My porter said he went conservative because of the known porosity issues with these Indy heads. I'd rather give up a little air flow and not have a set of expensive door stop.

Intake, .100" 65, .200" 115, .300" 166, .400" 220, .500" 271, .600" 308, .700" 310.
Ex., .100" 62, .200" 82, .300" 126, .400" 156, .500" 180, .600" 197, .700" 208.

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