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Thread: 350 crank in 400 block
          
   
   

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  1. #1
    ron 52's Avatar
    ron 52 is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: chevy 1977 silverado
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    350 crank in 400 block

     



    Has any one on this list put a 350 crank in a 400 small block ?
    If so is it better than using a 400 crank ?
    I am using the motor for street use and want good millage .
    ron 52

  2. #2
    camaro_fever68's Avatar
    camaro_fever68 is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 68 Camaro 69 Chevelle 78 Chevy Luv
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    Re: 350 crank in 400 block

     



    Originally posted by ron 52
    Has any one on this list put a 350 crank in a 400 small block ?
    If so is it better than using a 400 crank ?
    I am using the motor for street use and want good millage .
    Ron,
    DON'T DO IT.. That is a high RPM hp engine combo. What
    I mean by that is it doesn't start making power until your in the
    upper RPM range. That would suck on a street engine because
    you would have low bottom end torque which is what is needed
    for the street. However, with the right gears, high stall or
    manual gearbox, and a light vehicle, a 377 will scream. But for a
    street motor it sounds like you have a 400 you could build. I
    would make that a 406 with a 0.030 overbore and at least
    a 5.7 rod torque monstor. You can get order a kit that has a
    better cast crank, good rods, and pistons and rings for under a
    $700 and have an awsome street motor. Or if your on a tight
    budget you could rework stock 350 rods with ARP bolts and
    and honed pretty cheap at your machine shop. Then just order
    piston for the 406 with 5.7 rod. Throw on some decent heads
    vortec and have a killer torque monstor.
    RAY

    '69 Chevelle--385
    '68 Camaro--Twin Turbo
    '78 Luv--383

  3. #3
    cj11l is offline CHR Member Visit my Photo Gallery
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    Second what camaro fever said. Have built many 377 combo's for circle track stuff, don't recommend for every day street driving. You will be much happier with the 406!!

    Chris Laarman
    Ottawa Engine and Performance
    www.ottawaengine.com

  4. #4
    73RS's Avatar
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    I don't totally agree with the other two posts that the 377 is a high rpm engine. It can be built that way and performs great in the upper rpm range when built to do so. Really though it's just a big bore 350 and will perform like a 350 in the lower rpm range if cammed to run there.
    I do agree that for the street a 400 crank in the 400 block or in a 350 block is better suited due to the increased torque. You would be happier with the increased stroke.

  5. #5
    firebird77clone's Avatar
    firebird77clone is offline CHR Member Visit my Photo Gallery
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    there is no replacement for displacement.
    Education is expensive. Keep that in mind, and you'll never be terribly upset when a project goes awry.
    EG

  6. #6
    erik erikson's Avatar
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    Talking

     



    Originally posted by firebird77clone
    there is no replacement for displacement.
    EXCEPT,15 LBS. OF BOOST OR A 250 SHOT OF N20.I THINK THIS MIGHT OF BEEN POSTED BEFORE.

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