Chevy 377 motor Vs 406

Discussion in 'Engine / Swaps etc.' started by Chevyonbillets, Jul 4, 2010.

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  1. Chevyonbillets

    Chevyonbillets Not-quite-so-new-guy

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    I was chatting with a old friend about a few engine builds that I have pending , I have a 400 block with two freeze plugs on
    each side , stander bore . So I ask him what about putting a chevy 350 crankshaft in the 400 block we both were :?: :?:
     
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  2. SScamino

    SScamino Master Mechanic

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    cubic inches wins everytime!!! dont bother going through the trouble of a 377 and destroking a perfectly good 400 spend that money on a good set of heads and make 500 hp now!
     
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  3. dogshit

    dogshit Royal Smart Person

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    I suspect you already know its all about application. 377 is generally better for a well geared light race car or a light drag car. For about everything else a 406 is better hands down. RPM = ruins peoples motors. Why spin the snot out of it if you can make the same HP and more torque down (more stroke) in a more useable rpm range and an rpm range that your engine can live a much longer life with. More cubes is more torque which is almost always a good thing. For a (relative) heavy street car the benefits are more and deeper than I want to list.
     
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  4. Chevyonbillets

    Chevyonbillets Not-quite-so-new-guy

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    Thank's , I will start looking for a good 400 crankshaft, I have srp pistons 30 over with eagle H beans rods 5.7 just waiting for me to put a good crank on that block. I have a stock 400 crank but i seen people running those cranks and they break at the damper pin side .
     
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  5. 84cutlass454

    84cutlass454 Greasemonkey

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    the 400 all the way is my favorite sbc good heads and intake and cam is 500 horse power with ease hear let me show u its got scat forged rods and crank keith black pistons 12.8.1 comp and dart pro 1 heads and a 850 dp the thang is a torque monster go with the 400 u wolnt be sry . [​IMG]
     
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  6. 86Cutlass383SR

    86Cutlass383SR G-Body Guru

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    Why? Why look for a good 30+ year old crank?

    http://www.summitracing.com/parts/ESP-104003750/

    This is a brand new stock replacement crank with 400 2.65 mains for $169.95 + shipping. And this is better than any 400 GM crank you will find. Better materials.

    And I agree, a good torquey 400 will be better than a 377 for most anything. Unless you're looking for an 8000 rpm strip motor that you plan on rebuilding every season ...

    Wish I could find a good 400 block. I'd be building a 420 ... but, since you already have the pistons, I'll let ya slide ... LOL
     
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  7. jrm81bu

    jrm81bu Comic Book Super Hero

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    I got two of them...... :D

    How bad you want one?
     
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  8. 86Cutlass383SR

    86Cutlass383SR G-Body Guru

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    If you'd told me about it before I had my 383 rebuilt ... but now that it's done ....

    (sigh) pipe dreamin again ...
     
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  9. Chevyonbillets

    Chevyonbillets Not-quite-so-new-guy

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    I like your set up bud
     
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  10. 84cutlass454

    84cutlass454 Greasemonkey

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    thank you the 400 will make u a happy camper and she run like a champ its got some awsome power
     
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