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Thread: 396 bore over
          
   
   

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  1. 09-26-2007 02:34 AM #1
    vortec king
    vortec king is offline CHR Member
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    396 bore over

     



    Can A 396 big block be bored over to 427-454 bore size? the bore on a 396 is 4.094 and 427-454 bore is 4.250, is the cylinder wall thick enough?
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  3. 09-26-2007 06:40 AM #2
    Racecar100
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    No It can not be bore that much. the casting will be to thin.
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  4. 09-26-2007 06:43 AM #3
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    erik erikson
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    Quote Originally Posted by vortec king
    Can A 396 big block be bored over to 427-454 bore size? the bore on a 396 is 4.094 and 427-454 bore is 4.250, is the cylinder wall thick enough?
    If you have any question about wall thickness have the block sonic tested.
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  5. 09-26-2007 02:51 PM #4
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    HWORRELL
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    In street or prolonged use I doubt it would last. Buttttt I did get away with it in a circle track alky motor several years ago,had no other choice at the time and it lasted a season and half before it got a hairline crack in one cylinder.
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