350 or 400?

Discussion in 'Camaro Questions' started by Stephenjwbutler, Jul 10, 2010.

  1. Stephenjwbutler

    Stephenjwbutler New Member

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    I am wanting to build an engine that puts out about 400hp naturally aspirated and I was wondering which would be the best to work with out of these two engines. A friend also says I could turbo the engine with a blow through carb, Would that be worth it. Thanks for your info if you have any ideas where I could find these engines for cheap if you could please share that would be great.
    Thanks
     
  2. z28rod

    z28rod Veteran Member

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    build a 406 with aluminum heads, should make 400 hp easy.
     
  3. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

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    Build a 383
     
  4. david.rosol

    david.rosol Veteran Member

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    I'd go with the 400 build... As far as finding either a 350 or 400 to buy cheap, you can sometimes find some good deals in the swap meet section, otherwise, craigslist, or ebay are some other places, or a local salvage yard. 400's are harder to find because there are a gajillion more 350's than 400's. If you go the 400 route & plan to make 400hp, make sure you get a 2 bolt main block. Unlike the smaller cousins that favor 4 bolt mains for a stronger bottom end, the 400 is stronger with the 2 bolt mains. Also, like z28rod said, have it bored .30 over to make a 406, and install a real good set of heads; should easily make 400hp with the right cam, intake, carb set up.
     
  5. 79HumbleBee

    79HumbleBee Veteran Member Lifetime Gold Member

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    my 355 does about 430+, i would never think or forced induction for such a small goal of 400HP though.
     
  6. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

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    X2 400 is not a lot of hp to have forced induction
     
  7. sooner

    sooner Veteran Member Lifetime Gold Member

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    Id build the 400 any day. So much easier to make more streetable power with more cubes. Not to mention that the bigger bores of the 400 will unshroud your valves slightly allowing you to get more flow out of your cylinder heads than you would on a 4" bore motor.
     
  8. z28rod

    z28rod Veteran Member

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    "There is no replacement for displacement" remember this .....
     
  9. RockinZ

    RockinZ Veteran Member Gold Member

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    I am building a 565 hp 406 right now. Easy to do with AFR heads and flat top pistons.
     
  10. 5spd540

    5spd540 Veteran Member Lifetime Gold Member

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    So forget the idea of a small block and go big block if the cubes are the factor.
     

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