Excellent! Hadn't seen it before. Kudos

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

Picture of the post, courtesy of Ted in a previous "post".


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South Australia

THANKS, Frank. I've never cut a head open. Eickman's book was my source. Like any book, we know that there are a few errors in it.

Charlie Brown is still learnin'!

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

Charlie, the steel posts are actually simply an added iron post in the casting. The were not really steel but part of the actual cast iron casting, not a separate piece.

Frank/Rebop

Bristol, In ( by Elkhart) 

Hmmm... Thanks for writing, Paul. Apparently, my thread entry information wasn't clear as I stated it.

My understanding is that early production line 1957 supercharged engines were assembled with heads having the casting letters EDB-D. Some problems were encountered in competition with the roof of the EBD-D combustion chamber 'lifting' due to increased compression pressures. Ford responded by adding steel rods to the internal design of the head casting. Cylinder heads with the casting letters EDB-E (heads with the steel rods that we call 'posts') became the production line replacement for the earlier EDB-D cylinder head on the supercharged engines. As you noted, John Mummert's chart indicates that there is indication of some factory supercharger heads with the stamped letters EDB-C.

The addition of the steel rods in the casting of supercharged y-block cylinder heads was subsequently incorporated in the making of ALMOST all other y-block cylinder heads that Ford was producing during the remainder of the 1957 model year.

The only exception to the later use of steel posts in the making of y-block heads during the '57 model year was the Dearborn produced small letter ECZ-G cylinder heads mentioned earlier in this thread. This has been indicated to me by J.M. and stated by Tim.
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Regarding '57 ECZ-G cylinder head applications:

Per John's cylinder head chart, in model year '57, cylinder heads with the casting letters ECZ-G were used in assembling Ford 272, 292, and 312 un-supercharged engines for passenger cars and many 272 truck applications.

312 'E' code dual quad equipped engines had ECZ-G cylinder heads.

All 1957 Thunderbirds (even those produced into December of 1957), with 'C' code 292 engines and 'D' or 'E' code 312 engines used the large letter ECZ-G cylinder heads.

I have never seen small letter ECZ-G cylinder heads on any '57 or '58 Mercurys.

John Mummert's cylinder head chart lists specialized 1957 production year y-block applications (HD trucks, industrial engines) that may also have the steel posts depending upon when the heads were made. These include heads with the casting letters ECR-(various suffixes) and ECZ-A.
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Regarding the milling of ECZ-G heads... I agree with removing as little material as possible when reconditioning them. A look at the thickness of the surface that mates with the block any place that there's a cooling system opening clearly shows that there is not that much cast iron material there to begin with.
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I hope this clears up any confusion I generated.

Regards,

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

This posted head information seems to be getting confused? Are we given to understand that "G" heads were used by Ford on supercharged engines?! That isn't my understanding. According to the Reese/Mummert chart, SC heads were originally EDB-D, E & C heads. ECZ-G heads were standard on "E" code engines, not "F" code engines.. Correct? Further, Ted Eaton says that the factory specified that early "G" head should only be milled up to 0.010" Ted says it's alright up to 0.025," providing that other changes to increase compression, such as domed pistons, have not been done..

Paul

Give consideration to what Bill has suggested. A large number of '57 Fords and Mercurys were produced with un-posted heads and never had trouble with head failure.

Yes, your engine has been overbored .060 and your heads milled .025 all of which increases the compression ratio. Using today's thicker composite head gaskets, you likely have brought everything back to where it was new from the factory.

My understanding is that Ford moved to employing the steel posts within ALMOST all of their late '57 head casting series after having problems with heads used on the '57 supercharged 312 engines in competition use. -Truth be told, likely those with supercharged heads having failure had figured out ways to increase the factory limited maximum boost from 6 psi to something higher.

Unless you move to domed pistons, a supercharger, or turbocharger, posting the heads is something you likely don't have to spend time doing.

Food for thought.

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

If, as aussiebill suggests, the blocks under the centre spark plugs are 1.000" before machining,my heads have been milled .025".

I figured the posts will give a bit more support.

Thoughts?

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South Australia

I dont think you have to worry about posting them unless you plan on supercharging!

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

I think the first link is the step-by-step detailed procedure that you're looking for. The second thread has some other good pertinent info though, also.

ADDENDUM: I JUST TRIED TOGGLING THE ABOVE LINKS, DID GET TO THE CORRECT PLACES, BUT NO PICTURES! PERHAPS THIS IS RELATED TO MY COPYING AND PASTING THE INFORMATION???



Yes, the link is working fine, pics are a-ok.


That is the article i was looking for, thanks heaps


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South Australia