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By kansas - 12 Years Ago
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trying to tell which heads I have with out taking them off of engine/block is a ecz6015a which could be a 292 or 312 /heads are ecz-c they could be off of a 272 8.0 cr 173 hp /or 292 8.4 cr 202hp/or 312 9.0 cr 225 hp/ is there any way of telling what I got with out tearing it down? don't know what main rear main cap is/when I got the car it had the A intake with teapot carb which makes me think that it a 292
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By mctim64 - 12 Years Ago
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You have ECZ-C heads! They are the same on each engine, the compression cahnges because the volume of the cylinder changes as the ci gets bigger. 292 or 312, now that is the question. 
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By kansas - 12 Years Ago
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ok now I understand heads/now if I could just look at the rear main cap with out takeing the pan off/thanks for the info jim
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By grandpas4dr56 - 12 Years Ago
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You could find someone with a boroscope. Drain the oil and look through the drain plug hole. It would also give you a good look at the pickup screen and see if the is anything lingering around in the oil pan that would cause alarm.
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By Oldmics - 12 Years Ago
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It sorta sounds like your attempting to find out if you have a 312 since you want to look at a main cap. You could take a look see at the crankshaft flange where it meets the tranny.See if it has the "dot" or not. Still not 100% identification but beats pulling the pan. Oldmics
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By speedpro56 - 12 Years Ago
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In 1956 the C heads were on 312s with automatics the B heads were on 292s with automatics and 312s with stick shifts. In 1957 they went to G heads with all V8s I believe.
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By Oldmics - 12 Years Ago
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Mummerts head chart does list the "C" head as being installed on the 1956, 292 engine also. Just sayin Oldmics
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By PWH42 - 12 Years Ago
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All 56 292s and 312s came with C heads.I don't know about 272s.
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By PF Arcand - 12 Years Ago
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Given the 2 Bbl carb & intake it's very unlikely that it's a 312.
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By Oldmics - 12 Years Ago
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The "A" manifold mentioned would have been on a 56 as well as having a 4bbl teapot to fit that manifold. May be a 312-course ALL "Y" blocks are 312s RIGHT  Oldmics
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By speedpro56 - 12 Years Ago
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All 56s did not have C heads. My national show winner 1956 sunliner with Low milage has the original B heads which are the same as the B heads that came on my stick shift 312 1956 tbird. My 1956 crown victoria 312 automatic came with C heads. My 56 sunliner was parked in 1959 with 14,000 actual miles. I bought it in 1974 and the 59 tag was still on it. My 56 tbird was parked in 1966 with 60,000+ actual miles in the owners basement with a white sheet covering it and the original inspection sticker for 1966 and I bought it in 1982. My 56 crown my first car I bought in mid 1965. In the past I've owned at least 20 56 fords and about 5 57s. I'm not saying some 292s didn't come with C heads but I,ve never seen any that were original. When it comes to 1956 mercs they all came with 312s and I've had abunch of them as well and the 312 out of it has C heads ( automatic ) my 56 custom 56 merc stick shift I used to own had B heads which has a slightly lower compression ratio thus the different heads and compression ratios are listed in some owners manuals.
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By joey - 12 Years Ago
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Related question, how come in '56 the TBird 312s that came with automatics had higher compression ratio (9.0) than the TBird 312s that came with standard shift (8.4)?
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By Hoosier Hurricane - 12 Years Ago
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They wanted a little extra torque so that the automatic cars would be more equal with the standard shift cars.
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By PF Arcand - 12 Years Ago
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I've heard it said that most 1956 cars & T.Birds had ECZ-C heads. But Gary B. says not so.. & he may be correct, as Eickman's Y-Blk book lists 6 different casting #s for 1956, (not including trucks) including two numbers that end in "B". They are ECZ-B & EDB-B. However, oddly only 3 part numbers are listed.
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By joey - 12 Years Ago
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Hoosier Hurricane (1/16/2013)
They wanted a little extra torque so that the automatic cars would be more equal with the standard shift cars.How did they achieve that slight increase? Was there a mechanical change somewhere in the heads, or was it just a 'numbers' thing Ford did?
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By speedpro56 - 12 Years Ago
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Paul I believe it's the chamber size in the different heads thus the stick cars having a different head than the automatic, but that does not mean some stick 312s didn't come with C heads especially for those set up for high performance etc.
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By Oldmics - 12 Years Ago
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I had heard that there were different head gasket thickness used.That would create different compression ratios. Oldmics
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By Pete 55Tbird - 12 Years Ago
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Another question regarding 292/312 cylinder heads. Which motors received the ECZ A and ECZ D heads. And would that imply that the ECZ A heads were made before the ECZ C/D heads and before the 1957 ECZ G Thanks for the information. Pete
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By kansas - 12 Years Ago
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boy looks like I open a can of worms /The only thing Im sure about is it a 55 vic and the vin# says it was born with a 272/what ever I got was rebuild in 1988 and lest then 12k put on /it runs good but I would like to know what it would take to get 300hp out of it /I think I will call ted one of these days
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By carl - 12 Years Ago
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i checked a couple 56 292 engines i have and found the following.the 56 292 that came out of a 56 Ford station wagon with standard transmission is a EDB block with ECZ-B heads.The car was stored since 1966 so more than likely it is the original engine.The other 292 is a ECZ-A block with ECZ-c heads and it came out of a 56 Ford station wagon with fordomatic trans.This engine was pulled out a couple years ago so dont know for sure it is original one or not
Carl
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By chiggerfarmer - 12 Years Ago
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For whatever it's worth I have a 56 Customline car 272 with C heads. I know it to be original. It was a standard transmission 2V engine with no other accessories. It even has standard cooling with the 3 blade fan.
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By PF Arcand - 12 Years Ago
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Tom: By the Y-Blk book your "C" heads are correct & are one of two correct casting #s for std & O.D. transmission 272s, for 1956. The other casting # was ECG-T.
Carl: The head info you posted for the two station wagons with 292 std & auto transmissions by the Y-Blk book also appears correct.
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By PF Arcand - 12 Years Ago
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Pete 55: ECZ-A heads appear on the Mummert/Reese list (not on the Y-Blk book list) as on 1956-272 pick ups. And as on 1956-312 Mercurys & Ford Police Interceptors, likely with std trans or O.D., as compression was at 8 to 1. No list for 292s.
Neither listing any year shows ECZ-D heads.. So ??
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By Ted - 12 Years Ago
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PF Arcand (1/17/2013)
....... Neither listing any year shows ECZ-D heads.. So ??I vaguely recall some older reference material that pointed to the ECZ-D head being the factory head for the 1957 Thunderbird with the 292. I’ll make it a point to go back through some of my older literature and validate this.
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By carl - 12 Years Ago
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I have a 56 Merc 312 that has ECZ-C heads with freeze out plugs on the end,This engine was pulled from the car in the early 70s so probably is all original Carl
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By Genuinerod - 12 Years Ago
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My 57 T-Bird is a "C" with 292 2bbl carb and it has it's original heads that are the G heads.
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