close

Privacy guaranteed - Your email is not shared with anyone.

Welcome to Glock Talk

Why should YOU join our Glock forum?

  • Converse with other Glock Enthusiasts
  • Learn about the latest hunting products
  • Becoming a member is FREE and EASY

If you consider yourself a beginner or an avid shooter, the Glock Talk community is your place to discuss self defense, concealed carry, reloading, target shooting, and all things Glock.

Big block/Small block V8

Discussion in 'Car Forum' started by pnarq5, Sep 26, 2005.

  1. pnarq5

    pnarq5

    244
    0
    Feb 11, 2005
    Ohio
  2. Z28ricer

    Z28ricer

    885
    0
    Aug 4, 2005
    Tampa, FL
    The small blocks block is well .... go figure... smaller, as a result the heads are also a different size, as is the intake, and just about all of the other parts.

    They share the same rear flange (for transmission) and well, they're both made by chevy of course, not too much else in common.
     


  3. DaisyCutter

    DaisyCutter

    580
    0
    Mar 1, 2003
    AZ
    Imagine that you have a wad of cookie dough, we'll call it a block.

    Now you want to cut 8 cookies out of it. So you cut your cookies and they taste good.



    Later on, you decide that you want some more cookies, BIGGER cookies. So you get another block and begin to cut 8 big cookies. After you cut the first few cookies, you realize that there's now way to cut-out 8 big cookies without a bigger BLOCK.

    The size of the block is determined by the size and number of the holes/cylinders you put in it.

    This is why 454ci, 440ci, 455ci, 500ci, 460ci, etc., engines need a "big" block... While 302ci, 305ci, 350ci, 351ci, 360ci, etc. can use a "small" block.
     
  4. DaisyCutter

    DaisyCutter

    580
    0
    Mar 1, 2003
    AZ
    Also, big blocks don't utilize internal combustion the same way that small blocks do... In a big block it's the weight of the gasoline that pushes the pistons down.
     
  5. pnarq5

    pnarq5

    244
    0
    Feb 11, 2005
    Ohio
    Is it all about displacement? Can you have a small block with a larger displacement than a big block?
    If it is all about displcement, where is the cut off between the two? Over what size does a small block become a big block.
    DaisyCutter, thanks, now I am hungry for some cookies.
     
  6. Displacement isn't what seperates the big block from the small block. From the factory, in cars, the small block came in sizes from 265 to 400 and the big block came in sizes from 396 to 496. Aftermarket components can raise the displacement of the small block to 454 cubic inches and the big block to over 700 cubic inches. This is done by changing the bore and stroke of the engine, allowing bigger pistons to move further within the cylinder. A small block can't bocome a big block since the terms refers to the physical dimensions of the block itself, dispacement refers to the amount of water that can be fit into the cylinder with the piston sitting at the very bottom of its stroke.

    Hope this helps.
     
  7. David N.

    David N.

    328
    0
    Feb 13, 2002
    Kentucky
    No, its about the physical size of the block. For example, the Ford FE series big block came from the factory with displacements ranging from 332ci to 428ci. Modern versions can be taken up to 532ci. Ford's Windsor family small block (302, 351) can be taken up to 427ci or more. A big block will usually have larger bore spacing and can have a longer stroke, so it's largest possible displacement will be greater than a small block's, but there is a lot of overlap in the actual displacements.

    Edited to put back numbers that magically disappeared.
     
  8. pnarq5

    pnarq5

    244
    0
    Feb 11, 2005
    Ohio
    Got it! Thanks yall for all the info. That one was buggin me for a while.
     
  9. David N.

    David N.

    328
    0
    Feb 13, 2002
    Kentucky
    Really? How much does a piston weigh? And what about the connecting rod, and crankshaft, and other parts that must be moved to "push the pistons down?" And what about the friction that must be overcome? Now how much does a gallon of gas weigh? And how many times will that single gallon of gas have to "push the pistons down" before it is gone?
     
  10. DaisyCutter

    DaisyCutter

    580
    0
    Mar 1, 2003
    AZ
    It's a joke, since big blocks don't generally get gas mileage exceeding single digits.
     
  11. David N.

    David N.

    328
    0
    Feb 13, 2002
    Kentucky
    I didn't think you could really be serious, but you've got to learn to use smilies. Just a single one somewhere below the post and it would have been the funniest post of the week. But like it was, it shocked me so bad I almost believed it was true for a couple seconds. ;G
     
  12. Asha'man

    Asha'man eat the eat!

    475
    0
    Jan 13, 2004
    Denver
    If it's strictly by block size, you could almost call the Ford modulars "big blocks". Ever see a 4.6 next to a 5.0? It's huge! 5.4 is probably even bigger, although I don't have much experience with those. And that's only 281ci and 331ci, respectively.

    Brian
     
  13. streeter69

    streeter69 This is Kewl

    450
    0
    Nov 25, 2001
    I like annoying people.
    It is not about block size. Olds and pontiac had the 455 which used the same heads as the 350.
    Fords have the Windsor blocks, clevland blocks, FE, Lima, modifieds, modulars;g
     
  14. DaisyCutter

    DaisyCutter

    580
    0
    Mar 1, 2003
    AZ
    Maybe I'll try a different metaphor...

    A big Ahole will nit-pic a simple explanation and cite specifics that don't apply to the generalization.

    A small Ahole would offer some value added explanation of their own versus agruing with everyone elses.

    :)
     
  15. David N.

    David N.

    328
    0
    Feb 13, 2002
    Kentucky
    The modular is pretty close to the FE in size. Click on the link for a sketch comparing the FE, 351 (Windsor, I think), and a DOHC modular. (Evidently it isn't there anymore, so see the attachment. Hopefully its fairly accurate.)

    http://www.erareplicas.com/427/3pro_front.gif

    I don't think the DOHC modular is any wider than the SOHC, but I think it is taller. I'm pretty sure this is the 4.6, and I don't know how the 5.4 would compare. While Chevy is going for BB displacement in a SB package, Ford goes for SB displacement and BB size. ;g I still like my 281, though. Just wish it was a later version.
     
  16. Asha'man

    Asha'man eat the eat!

    475
    0
    Jan 13, 2004
    Denver
    Good sketch. I have a photo somewhere on my comp of a 4.6 and a 5.0 on stands next to each other, I'll dig it up if I have time in the next few days.

    Brian
     
  17. SJRTX

    SJRTX Plastic Lover

    204
    0
    Mar 5, 2005
    Houston
    Talking about modulars-the blocks arent all that big-especially compared to a Ford or Chevy big block. Ive carried a few 4.6L blocks around-they arent that big. Its the heads that make them look big, and the SOHC heads arent that large, its the DOHC heads that are super wide because of both cams in each head. But other than the wide heads, the blocks arent that big. And there is not really any difference between the SOHC modulars and the DOHC modulars, infact, all the parts will interchange.