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455 over bore

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Old Feb 11, 2014 | 06:50 PM
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455 over bore
I have been searching the forum and found lots of guys over boring 0.30 to 0.60 on the 455. Has anybody ever took or 0.100 or 0.125 over? Do you think the cylinder would be to thin?
Mike
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Old Feb 11, 2014 | 07:05 PM
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I may be wrong but I believe .060 is the limit.
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Old Feb 11, 2014 | 07:33 PM
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overbore
Originally Posted by oldcutlass
I may be wrong but I believe .060 is the limit.

No. It is not. With a sonic check 455 blocks will take much more overbore than that. Lots of threads on here & ROP about core shift that discuss max overbore.
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Old Feb 11, 2014 | 08:22 PM
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What should I search for?
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Old Feb 11, 2014 | 08:25 PM
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The machinist took this block .0100 over and now is on a water jacket and wants to sleeve that cylinder. What's to say the others aren't to thin?
Mike
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Old Feb 12, 2014 | 09:11 AM
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The sonic checking can tell you how thick the walls are. It might get tough to find pistons for anything over .060 bore.
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Old Feb 12, 2014 | 09:16 AM
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I talked.to the machinist he said not to worry, not even close to the water jacket. Pistons are in I will let you know how it goes!
Mike
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Old Feb 12, 2014 | 09:24 AM
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pistons
Originally Posted by 455man
The sonic checking can tell you how thick the walls are. It might get tough to find pistons for anything over .060 bore.

Any piston over 0.060" will be a custom Olds piston or a non Olds 455 piston. Go big or stay home.
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Old Feb 12, 2014 | 09:34 AM
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We are!!
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Old Feb 12, 2014 | 09:44 AM
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Curious
Originally Posted by crank shaft
We are!!

Or you adding stroke in this rebuild or simply doing a big overbore?
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Old Feb 12, 2014 | 09:45 AM
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Just a big bore, edelbrock heads and intake, and a nice cam
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Old Feb 17, 2014 | 06:56 AM
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What does the six by the distributer hole? And how do I attach a pic?
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