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Thread: 396/400 differences?
          
   
   

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  1. 12-20-2003 09:18 PM #1
    Chevell72man
    Chevell72man is offline Registered User
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    Car Year, Make, Model: 72 Chevy Chevelle
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    396/400 differences?

     



    Why is a 396 a BB. But a 400 is a SB?
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  3. 01-24-2004 01:18 PM #2
    POWER2BURN
    POWER2BURN is offline CHR Member
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    Car Year, Make, Model: 86 GMC Sierra Classic
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    396 BB is a big block about 125 pound heavier and bigger.
    4.096" Bore x 3.76" stroke
    can be bored to 4.196 (That I know of) and should be able to fit a 4" stroke crank for a 454. (442.5ci BB)

    400SB is lighter, but more likely to over heat.

    4.125" B x 3.75" stroke.

    can be bored to 4.165" x 3.75" stroke. (409ci SB)

    you can rebore a 400SB 3 times 020,030,040
    you can rebore a 396BB 6 times 020, 030, 040, 060, 070, 100
    had a rebuilt 355SB chevy
    it lasted 42,000km
    Got another rebuilt 355SB
    it lasted 62km.
    I still have not had a powerful engine.

    slowly building a quicker truck
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