I am somewhat confused by an engine on Ebay - http://www.ebay.com/itm/251250363173?item=251250363173&viewitem=&sspagename=ADME:X:RTQ:MOTORS:1123&vxp=mtr

The engine has the raised aspirin sized dot on the crank flange. Mummert's web site, "How to identify a 312" - says that "not all 312 cranks have this aspirin size raised dot". I thought this meant that if the dot was present , the engine was a 312. However it could still be a 312, even if the dot was missing. It also says that a 312 has ECZ main caps and that all others are EBU. The engine on ebay has the raised dot but it has EBU main caps, which to me seems contradictory. Mummert also says that he caps are "the only positive way to identify a 312". So, my question is, do engines other than 312s have the aspirin sized raised dot on the crank flange?

BudMan

When Injustice Becomes Law, Resistance Becomes Duty

This appears to be a 292 block with a 312 crank, this could have been accomplished in 1 of 2 ways. Either the 312 mains have been turned down to 292 std size (most likely) or the block has been aligned bored to 312 main size. There are a lot of good parts there and looks like it would be a good start for someone.

Glen Henderson



Freedom is not Free

Letohatchee, AL

Hi - I received this email from the seller on ebay responding to my comment that the crank appeared to be a 312.

"Yes. Your correct..However the 312 and a 292 blocks are of the same cast. Different operations after the casting separate the two. . The C1AE block is a 292 Heavy duty truck block with EBU Main Caps on a 312 crank"

Interesting. I guess there is no end to the variations.

BudMan.

When Injustice Becomes Law, Resistance Becomes Duty

If it's a 312 crank, then the pistons are custom since C2 rods were used. I don't believe there is a Y piston that would work with that stroke and rod length combo. One picture of the crank has 2.4984 painted on it, which is 292. So if it is a 312 crank, the mains have been turned, which explains the ebu caps.

I don't think it's stock by any stretch but it does look like it might have some good stuff.


Lawrenceville, GA

Does look like a good Y for someone if the price and location comes out right. To far for me to make it work out.
Too bad the guy never got to finish it.

       A  L  A  N   F  R  A  K  E  S   ~  Tulsa, OK    

[quote]charliemccraney (3/26/2013)

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If it's a 312 crank, then the pistons are custom since C2 rods were used. I don't believe there is a Y piston that would work with that stroke and rod length combo. One picture of the crank has 2.4984 painted on it, which is 292. So if it is a 312 crank, the mains have been turned, which explains the ebu caps.

I don't think it's stock by any stretch but it does look like it might have some good stuff.[/quote

I may need to read the ad again, but I thought he said the pistons were missing, absent, not included, or something like that, and that the entire motor was more a loose mock-up while the previous owner figured out what he was a building.

Dunno... Brian

Cylinder Index = 84

Current Experiment = `57 Tbird, Grand Rapids, Michigan

The partial set of roller rockers looks weird. This may be a great deal if the reserve is right but I think I'd like to have a Y-Blocks member that lives nearby check it out. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

I didn't read. Just looked at pictures


Lawrenceville, GA

In the picture of the close up of the crank journal there doesn't seem to be much of a radius on the sides?? Or is it just these old eyes... Also, appears he was going to run Dove rockers on the intakes only?

"The Master Cylinder"

Enjoying life at the beach in SOCAL

What ever it is, its defiantly worth some good bucks. Most of the work looks A+. \ I installed Dove Rockers in my 312 and had a little issue with the spacers. Perhaps that is what is going on here. Really a nice motor to get your arms around.