Casting dash number

[Bruce J]

Anyone know what the dash number means after the main number on big blocks? I have not found any reference for it.

 

[chooch]

tooling or casting revision number

 

[4mayhemi]

Here's a good long answer link for that
http://www.440source.com/partnumberinfo.htm

 

[Bruce J]

Here's a good long answer link for that
http://www.440source.com/partnumberinfo.htm

I went back and re-read that after I posted up this thread and although it helps, it does not explain how it affects the castings. The reason I asked was because I came across a block for sale and was claiming that a -4 has thicker walls. I sent a message where he got this info and came back saying a -1 has is the thickest and gets thinner as the number gets bigger. I call bs because of the way casting get made, it would opposite to me. Unless, each time a revision is made, it did mean just a clean up of the mold masters but new all together mold masters.

 

[moper]

The core box number is just that. It meant something to the foundry guys, nobody else. Has nothing to do with casting quality.

 

[1962polara]

All the 426 max wedge blocks I've ever seen were -1

 

[4mayhemi]

The revision # vs. the casting date on a block can be all over, especially considering the amount of castings happening at the same time. I don't get his theory - where is the thinning occurring? I guess watch out if you've got 2536430-13! He was probably trying to justify more $ for the block by saying that.

You basically said it, that a "revision" doesn't mean it has measurable differences or an engineering change, just a new core because the last one went through hundreds of pours.

 

[dvw]

Look for core shift. Are the machined holes close to the center of the casting boss. Sonic check. Look at the water jackets for excessive corosion. Magnaflux. All else is just guess work
Doug