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how big bore on pre world crate hemi #1424034
04/22/13 11:13 PM
04/22/13 11:13 PM
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Ohio
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billohio Offline OP
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Going to sonic test my 472 and curious what others have done with boring out block. Its about a 2007 block pre world casting

Re: how big bore on pre world crate hemi [Re: billohio] #1424035
04/23/13 10:42 PM
04/23/13 10:42 PM
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ahy Offline
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My understanding is sonic test is the key. There was some variability in that era block.

Re: how big bore on pre world crate hemi [Re: ahy] #1424036
04/23/13 11:01 PM
04/23/13 11:01 PM
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billohio Offline OP
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Its got a sticker don't exceed 4.34. Heard the had some issues and a lot of blocks had stickers. Would like a 4.5!

Re: how big bore on pre world crate hemi [Re: billohio] #1424037
04/24/13 12:04 AM
04/24/13 12:04 AM
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California
mickm Offline
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Quote:

Its got a sticker don't exceed 4.34. Heard the had some issues and a lot of blocks had stickers. Would like a 4.5!




if it's got a sticker that says don't exceed 4.34, then it is a water block, not a siamese.

don't exceed 4.34!

Re: how big bore on pre world crate hemi [Re: mickm] #1424038
04/24/13 12:13 AM
04/24/13 12:13 AM
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Shelby mi.
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JAKE68 Offline
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That was mostly used for building legal ss motors before the world prod ones. Great block but you just cant build a real big motor with it.


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Re: how big bore on pre world crate hemi [Re: JAKE68] #1424039
04/25/13 03:08 PM
04/25/13 03:08 PM
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Ohio
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billohio Offline OP
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Were any pre world blocks Siamese?

Re: how big bore on pre world crate hemi [Re: billohio] #1424040
04/25/13 03:13 PM
04/25/13 03:13 PM
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Stuttgart, Arkansas
rickseeman Offline
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I think so.


2011 Drag Pak Challenger
Re: how big bore on pre world crate hemi [Re: rickseeman] #1424041
04/25/13 03:18 PM
04/25/13 03:18 PM
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California
mickm Offline
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yes, they were. i've got one in my car now.

Re: how big bore on pre world crate hemi [Re: billohio] #1424042
04/25/13 09:20 PM
04/25/13 09:20 PM
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JohnRR Offline
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Quote:

Going to sonic test my 472 and curious what others have done with boring out block. Its about a 2007 block pre world casting




Is there a decal on the bellhousing flange saying to only bore to 4.340 ? If so it's a siamese bore reject that they couldn't use to build a 528 or sell as a good 4.5 bore. I have one , having it sonic checked , what I have been told is a cylinder or 2 will have enough core shift to make it not a good candidate.


Sleeve the offending holes with a good quality sleeve and let it eat.

Re: how big bore on pre world crate hemi [Re: mickm] #1424043
04/25/13 09:21 PM
04/25/13 09:21 PM
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JohnRR Offline
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Quote:

Quote:

Its got a sticker don't exceed 4.34. Heard the had some issues and a lot of blocks had stickers. Would like a 4.5!




if it's got a sticker that says don't exceed 4.34, then it is a water block, not a siamese.

don't exceed 4.34!




that is not the case , I have a 426 crate motor circa 2005 , it's a siamese bore block , or it's cast real bad because I can't pass anything between the cylinders I tried .

Re: how big bore on pre world crate hemi [Re: JohnRR] #1424044
04/26/13 05:17 PM
04/26/13 05:17 PM
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Lima, Peru
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I have a siamese block which has the dont exceed 4.34 bore sticker.

Like John says, they are siamese but must have some core shift that prevents boring them up to 4.5

I guess if you sonic test em you could easily see which ones are the bad cylinders and maybe then you could sleeve those to make em 4.5 bore worthy.

Re: how big bore on pre world crate hemi [Re: domingo] #1424045
04/26/13 06:43 PM
04/26/13 06:43 PM
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Minnesota
Hemi_Joel Offline
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Don't trust the sticker. Do your own sonic, it might go to 4.5" regardless of the sticker. I have heard of that happening.


[img]http://i.imgur.com/boeexFms.jpg[/img]
31 Plymouth Coupe, 392 Hemi, T56 magnum
RS23J71
RS27J77
RP23J71
RO23J71
WM21J8A
I don't regret the things I've done. I only regret the things I didn't do.
"Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
Re: how big bore on pre world crate hemi [Re: Hemi_Joel] #1424046
04/26/13 11:18 PM
04/26/13 11:18 PM
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Ohio
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billohio Offline OP
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Hopefully next week we can get it apart and check. Would be nice to get a 4.5 out of it.
Joel my car looks like yours but not that light in the front!

Re: how big bore on pre world crate hemi [Re: Hemi_Joel] #1424047
04/29/13 06:08 PM
04/29/13 06:08 PM
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JohnRR Offline
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Quote:

Don't trust the sticker. Do your own sonic, it might go to 4.5" regardless of the sticker. I have heard of that happening.




Exactly what I had done to the one I have , will have the sheet tomorrow.

And just because it's a new block doesn't mean it was machined correctly, one deck was higher than the other by .002 or .003 , the lifter bore angles were off ...

Re: how big bore on pre world crate hemi [Re: JohnRR] #1424048
04/30/13 01:30 PM
04/30/13 01:30 PM
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Minnesota
Hemi_Joel Offline
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Quote:

Quote:

Don't trust the sticker. Do your own sonic, it might go to 4.5" regardless of the sticker. I have heard of that happening.




Exactly what I had done to the one I have , will have the sheet tomorrow.

And just because it's a new block doesn't mean it was machined correctly, one deck was higher than the other by .002 or .003 , the lifter bore angles were off ...




Please post the results, John, enquiring minds want to know...


[img]http://i.imgur.com/boeexFms.jpg[/img]
31 Plymouth Coupe, 392 Hemi, T56 magnum
RS23J71
RS27J77
RP23J71
RO23J71
WM21J8A
I don't regret the things I've done. I only regret the things I didn't do.
"Wise men talk because they have something to say; fools because they have to say something. ~ Plato"






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