1956 292 motor rebuild and rebuilder Cincinnati

[bfdinardo]

Hello folks,
So I've taken the plunge and pulled the motor of my 1956 Fairlane Victoria! I was told it is the 292 with the Fordomatic and a Holley 650 newer carb. It had a knock that I didn't like and quite frankly wanted peace of mind that a fresh rebuild will improve reliability knowing how old everything is in the motor. The code on the block is ECZ-6015 C, the code on the intake is ECZ-9425 A and the code on the heads are ECZ-C. Based on the link it looks like I have a 312 block... http://ford-y-block.com/Block%20identification.htm unless I have to remove the flex plate and check the crank main bearing cap for a dot.

I plan on rebuilding the heads (valves, springs, rocker arms, push rods) and then evaluating the bores, pistons and rings for if a bore over is necessary due to clearances. I'd like to leave the crank in if it meets spec and is in good shape as I've been told that the seals are tough to make leak proof when replaced. Does anyone know of a reputable Y block engine builder near the Cincinnati area if I do need to send it out to be bored out or have machine work done? I've also ordered a few books to help me along the rebuild process, by James Eikman and Charles Morris. I've done top ends on motorcycles a few times but never a full size motor so any advice is appreciated!

[dmsfrr]

If it's a 312 the main bearing caps will have an ECZ prefix casting number.
312 crankshaft flange 'dot' photo...

[Mac VP]

Call Kevin at HUCK’S MACHINE SHOP. He can do the entire engine and is a specialist on cylinder head rebuilding. His shop is right next to the KOI Parts store in the Eastgate area.

[54vicky]

you may want to think about a carb of a size suited for the cubes.bigger is not better when it comes to carbs.

[dmsfrr]

Originally Posted by bfdinardo

Hello folks,
So I've taken the plunge and pulled the motor of my 1956 Fairlane Victoria! I was told it is the 292 with the Fordomatic and a Holley 650 newer carb. It had a knock that I didn't like and quite frankly wanted peace of mind that a fresh rebuild will improve reliability knowing how old everything is in the motor. The code on the block is ECZ-6015 C, the code on the intake is ECZ-9425 A and the code on the heads are ECZ-C. Based on the link it looks like I have a 312 block... unless I have to remove the flex plate and check the crank main bearing cap for a dot.

I plan on rebuilding the heads (valves, springs, rocker arms, push rods) and then evaluating the bores, pistons and rings for if a bore over is necessary due to clearances. I'd like to leave the crank in if it meets spec and is in good shape as I've been told that the seals are tough to make leak proof when replaced. . . .

If the engine has a knock I'd think the crank and rod bearings are one of the first things to remove and thoroughly inspect.
There are good and bad ways to put in a replacement rear main seal.
The ECZ-6015-C block casting number only tells you it's a '57 block, either 292 or 312. Those blocks were machined both ways.
http://www.ford-y-block.com/identify312.htm

Originally Posted by 54vicky

you may want to think about a carb of a size suited for the cubes.bigger is not better when it comes to carbs.

bfdinardo, assuming a redline of 5000 rpm (???) on a stock 312 a cfm rating over 400 is unnecessary and may lose some efficiency.
Two CFM calculator links...

http://www.carburetion.com/calc.asp

https://www.summitracing.com/newsand...cfm-calculator

[scicala]

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If a large carb like a 650 is used, true that it's a little too big, but if a vacuum secondary as opposed to mechanical secondaries, it will still be OK since the engine demand (venturi suction) will only be so much and never open the secondaries all the way.


However, smaller primary venturi's will make more crisp throttle response and low RPM performance.


Sal

[KULTULZ]

Carb choice is also in relation to the engine volumetric efficiency ( ) and and build, not to just engine size.

Ex - BOSS 302 (street) came through with a 780CFM.

These engines were built and used before carburetion became more advanced.

You run a 390CFM on other than a dead stock engine, she is going to be wheezin' at some point.

[bfdinardo]

Thanks for the insights guys. Haven't yet decided while I'll do with the carb. In other news, I found a little extra something in the lifter valley once I got the intake manifold and valley pan off...a bent push rod that someone previously left in there! It frustrates me what some people will do to cut corners. That being said there is NO sludge build up anywhere but there is a mix match of new and old (solid style) push rods that will be replaced with the new tubular style. Once I get the heads off, I'll inspect the heads and see if any machine work is required. I'll check out Hucks machine shop once I get back into town, but does anyone else have any suggestions for machine shops familiar with these Ford Y blocks near the Cincinnati, Indiana, Kentucky areas? Thanks!

[Gene F]

Do yourself a favor, demand a new rear main cap be used with the rebuild. New, as in source a new one.

[packrat5]

All you have to do is measure the bore. A 292 is 3.750, and a 312 is 3.8