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Old 12-16-2018, 05:50 AM   #1
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Eagle Head

Good Sunday to all, well I got some Eagle heads in the other day, and I know most of us have seen these heads cut open, but here's some of the dissected parts I wanted to see.
1st boring head shot, 2 is what the oil passages look like(kind of), 3rd is a cross-section where the spark plugs mount...notice the water pocket. 4th is also of the water jacket between cylinders.
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File Type: jpg Eagle Head 1.jpg (39.3 KB, 9 views)
File Type: jpg Eagle Head Aa.jpg (33.0 KB, 12 views)
File Type: jpg Eagle Ab.jpg (28.8 KB, 10 views)
File Type: jpg Eagle Head Ak.jpg (34.6 KB, 10 views)
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Old 12-16-2018, 06:02 AM   #2
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here's the Intake port cut horizontal , 1st shot is an ordination shot, 2nd is close up, 3rd the section is turned 180 degree, 4th is top and bottom side by side
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File Type: jpg Eagle Head Ac.jpg (32.9 KB, 12 views)
File Type: jpg Eagle head Ad.jpg (27.2 KB, 9 views)
File Type: jpg Eagle Head Ae.jpg (29.1 KB, 9 views)
File Type: jpg Eagle Head Af.jpg (30.5 KB, 7 views)
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Old 12-16-2018, 06:04 AM   #3
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Closer shots, 3rd is not the greatest, I'll take some better ones later on in the week.
The thickness between the part wall and the pushrod hole is roughly .150.
Attached Images
File Type: jpg Eagle Head Ag.jpg (32.5 KB, 5 views)
File Type: jpg Eagle Head Ah.jpg (29.7 KB, 5 views)
File Type: jpg Eagle Head Ai.jpg (30.2 KB, 5 views)
File Type: jpg Eagle Head Aj.jpg (31.2 KB, 5 views)
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Old 12-16-2018, 06:08 AM   #4
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Intake Cross-section 1st two are the same port just different side of the cut, one has valve seat in it the other doesn't, last 2 are it's relation to the Exhaust port.
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File Type: jpg Eagle Head Al.jpg (32.0 KB, 6 views)
File Type: jpg Eagle Head Ala.jpg (34.0 KB, 6 views)
File Type: jpg Eagle Head Am.jpg (34.4 KB, 6 views)
File Type: jpg Eagle Head An.jpg (33.2 KB, 6 views)
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Old 12-16-2018, 06:14 AM   #5
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I'll get the Exhaust port shot tomorrow , in the next week or so I'll get the same shots of the pre Eagle head the Apache & BGE heads will have to wait till about Mid January.

Some of the next cross section Photos I'll post will have measurements, ..IE distance between Pushrod holes and Height from floor to Valve spring "bump"

The Other half of the head will be ported , with and with out tubes pressed in for the pushrods. and will be cross sectioned in the same manner as this half
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Old 12-16-2018, 07:32 AM   #6
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I deff see an issue where some porting guys may ruin a set of this heads easily along that runner lip
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Old 12-16-2018, 07:48 AM   #7
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My RLD heads have the push rod tubes installed. Porting that head IMO in a field land mines.
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Old 12-16-2018, 07:52 AM   #8
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Quote:
Originally Posted by charged392 View Post
I deff see an issue where some porting guys may ruin a set of this heads easily along that runner lip

Yes, you have to be careful in those area's. Just cleaning up the port and smoothing it out make a nice difference along with a flow performance 3 angle cut valve job.
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Old 12-16-2018, 08:02 AM   #9
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Biggest mistake I see people doing (even some of the "pros"s) do is hit the spring bump hard and and thin it out.

I tell anyone who will listen , the pushrod hump and the valve spring bump...polish to a mirror like finish and then leave the ports themselves 60Grit, don't enlarge those areas to get flow it's too risky these flow 320 out of the box 335 with a polish ., 335 is enough CFM to support 660-700Hp NA....that's my story and I'm sticking to it.
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File Type: jpg Eagle Head Ala_LI.jpg (46.9 KB, 8 views)
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Old 12-16-2018, 08:16 AM   #10
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Here's what they look like with 2.125 and 1.625 valves seats need to be changed out for this valve combo , and it's the largest combo you can install in these heads, the 2.14 intake is TOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO BIG...too Bucue, Valevly too bucue
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File Type: jpg Eagle Head 2.125-1.625a.jpg (34.7 KB, 7 views)
File Type: jpg Eagle Head 2.125-1.625b.jpg (37.1 KB, 5 views)
File Type: jpg Eagle Head 2.125-1.625c.jpg (32.4 KB, 2 views)
File Type: jpg Eagle Head 2.125-1.625d.jpg (33.3 KB, 3 views)
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