how do I calculate the bore/stroke displacement?

Discussion in 'Rotating Assemblies' started by Grumpy, Nov 8, 2018.

  1. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member



    youll obviously need precision measuring tools to be accurate
    you can get very close estimates if you own a accurate 12" dial caliper,
    if you need to know the exact dimensions you need better tools too measure,
    before you buy components talk to both the vendors and your machine shop of choice ,
    you damn sure don,t want mis-matched components and clearances.
    you need to measure accurately, and know what your current block will function correctly with,
    and pay attention to clearances and other details,
    that make or break the engines potential durability and power potential.


    short answer,
    a .060 over bore 454 is a 467

    displacement

    engine displacement formula

    bore x bore x stroke x number of cylinders x .7854= displacement
    examples

    sbc
    4.030 x 4.030 x 3.75 x 8 x .7854= 383

    BBC
    4.31 x 4.31 x .4.0 x 8 x .7854= 466.8


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    http://garage.grumpysperformance.com/index.php?threads/precision-measuring-tools.1390/#post-68861
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    RELATED INFO YOU NEED,
    yes the vast majority of the info is in the links and sub-links AS USUAL

    http://garage.grumpysperformance.co...onnecting-rod-rod-length-too-stroke-info.510/

    http://garage.grumpysperformance.co...-about-your-potential-dream-bbc-combos.14607/

    http://garage.grumpysperformance.com/index.php?threads/scat-cranks-related-info.10930/

    http://garage.grumpysperformance.co...piston-to-bore-clearance-on-your-block.14251/

    http://garage.grumpysperformance.co...ng-piston-pin-height-compression-height.5064/

    http://garage.grumpysperformance.com/index.php?threads/what-con-rods-would-you-buy.942/

    http://garage.grumpysperformance.com/index.php?threads/types-of-crankshaft-steel.204/

    http://garage.grumpysperformance.com/index.php?threads/redline.343/

    http://garage.grumpysperformance.co...-much-power-will-a-cast-crank-work-with.8685/

    http://garage.grumpysperformance.com/index.php?threads/flat-domed-or-pop-up-pistons-design.4472/

    http://garage.grumpysperformance.co...tion-of-crank-durring-short-blk-assembly.852/

    Chevy V8 bore & stroke chart
    I saw this online and figured I would post it..I am going to add the popular lsx strokers soon
    CID BORE STROKE
    262 = 3.671" x 3.10" (Gen. I, 5.7" rod)
    265 = 3.750" x 3.00" ('55-'57 Gen.I, 5.7" rod)
    265 = 3.750" x 3.00" ('94-'96 Gen.II, 4.3 liter V-8 "L99", 5.94" rod)
    267 = 3.500" x 3.48" (Gen.I, 5.7" rod)
    283 = 3.875" x 3.00" (Gen.I, 5.7" rod)
    293 = 3.779" x 3.27" ('99-later, Gen.III, "LR4" 4.8 Liter Vortec, 6.278" rod)
    302 = 4.000" x 3.00" (Gen.I, 5.7" rod)
    305 = 3.736" x 3.48" (Gen.I, 5.7" rod)
    307 = 3.875" x 3.25" (Gen.I, 5.7" rod)
    325 = 3.779" x 3.622" ('99-later, Gen.III, "LM7", "LS4 front wheel drive V-8" 5.3 Liter Vortec, 6.098" rod)
    327 = 4.000" x 3.25" (Gen.I, 5.7" rod)
    345 = 3.893" x 3.622" ('97-later, Gen.III, "LS1", 6.098" rod)
    350 = 4.000" x 3.48" (Gen.I, 5.7" rod)
    350 = 4.000" x 3.48" ('96-'01, Gen. I, Vortec, 5.7" rod)
    350 = 3.900" x 3.66" ('89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC, 5.74" rod)
    364 = 4.000" x 3.622" ('99-later, Gen.III, "LS2", "LQ4" 6.0 Liter Vortec, 6.098" rod)
    376 = 4.065" x 3.622" (2007-later, Gen. IV, "L92", Cadillac Escalade, GMC Yukon)
    383 = 4.000" x 3.80" ('00, "HT 383", Gen.I truck crate motor, 5.7" rod)
    400 = 4.125" x 3.75" (Gen.I, 5.565" rod)
    427 = 4.125" x 4.00" (2006 Gen.IV, LS7 SBC, titanium rods)

    Two common, non-factory smallblock combinations:

    377 = 4.155" x 3.48" (5.7" or 6.00" rod)
    400 block and a 350 crank with "spacer" main bearings
    383 = 4.030" x 3.75" (5.565" or 5.7" or 6.0" rod)
    350 block and a 400 crank, main bearing crank journals
    cut to 350 size

    ALL production big blocks used a 6.135" length rod.
    CHEVY BIG BLOCK V-8 BORE AND STROKE


    366T = 3.935" x 3.76"
    396 = 4.096" x 3.76"
    402 = 4.125" x 3.76"
    427 = 4.250" x 3.76"
    427T = 4.250" x 3.76"
    454 = 4.250" x 4.00"
    477= 4.5" bore x 3.76" stroke
    496 = 4.250" x 4.37" (2001 Vortec 8100, 8.1 liter)
    502 = 4.466" x 4.00"
    557T= 4.5 bore 4.375" stroke
    572T = 4.560" x 4.375" (2003 "ZZ572" crate motors)

    T = Tall Deck
     
    Last edited: Nov 9, 2018

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