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Old February 11th, 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 February 11th, 2014, 07:05 PM
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I may be wrong but I believe .060 is the limit.
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Old February 11th, 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 February 11th, 2014, 08:22 PM
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What should I search for?
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Old February 11th, 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 February 12th, 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 February 12th, 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 February 12th, 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 February 12th, 2014, 09:34 AM
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We are!!
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Old February 12th, 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 February 12th, 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 February 17th, 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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