F23 Internals Info

Discussion in 'Engine & Transmission Mods' started by BlkCurrantKord, Sep 8, 2007.

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  1. BlkCurrantKord

    BlkCurrantKord Super Moderator

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    Requested that this be stickied from another thread...

    Crower Rod Comparison between F23 and K20:

    B93749B-4 F23 5.551 1.890 0.780 0.866(22mm) 0.780

    B93733B-4 K20A3 5.453 1.890 0.780 0.866(22mm) 0.780


    First number is the length. (the only difference between the two)
    Second number is the bottom end or BE bore. (the larger end that connects to the crankshaft)
    Third number is the BE width.
    Fourth number is the PE or pin bore. (smaller end of the rod that connects to the piston)
    Fifth number is pin width.

    Other:

    Stock Bore - 86mm (3.385)
    Stock Stroke - 97mm (3.818)
    Rod Length - 5.551
    Rod Width - .780
    BE Bore - 1.890
    Rod Pin Size - 22mm (.866)
    Crank Mains - 55mm
    Rod Journal Diameter - 1.771
    Block Deck Height - 8.643
    Piston Compression Height - 1.181 (Same as K20/K24)
    Piston Volume - (-)14cc's
    Combustion Chamber Volume - 50cc
    Intake Valve - 34mm
    Exhaust Valve - 29mm
    Head Gasket Thickness - .026
    Stock Rod/Stroke Ratio - 1.45

    F23 stock rod length = 141mm (5.551in)
    K20a3 stock rod length = 139mm (5.453in)
    Eagle K20a3 Rod @ .030in longer = 146.1mm (5.753in)

    For comparison
    H22 stock rod length = 143mm (5.636in)
    H23/F22 stock rod length = 141.50mm (5.580)
    F20B stock rod length = 145.0mm (5.708in)


    Helpful Links

    - http://www.clubcivicquebec.com/compression_calculator_hfserie_f.php

    - http://www.bsperformance.com/compcalc/compcalc.htm

    - http://www.zealautowerks.com/hfseries.html
     
    Last edited: Sep 16, 2008
  2. Belgian CG4

    Belgian CG4 Active Member

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    I'm just doing some research and found this compression calculator:

    http://www.bsperformance.com/compcalc/compcalc.htm

    So it seams the F23A1/4 has -13,6 cc piston dome displacement and the F23A5 has the -18cc's as listed above.

    Maybe important for some
     
  3. WhiteAccord

    WhiteAccord Banned

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    arent the A5 Ulev?
     
  4. Belgian CG4

    Belgian CG4 Active Member

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    I guess so. I believe the A5 was never in the coupes, only in sedans.
     
  5. Kid2000EX

    Kid2000EX Well-Known Member

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    A5 has no vtec
     
  6. WhiteAccord

    WhiteAccord Banned

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    Ahhh yes that was it....
     
  7. BlkCurrantKord

    BlkCurrantKord Super Moderator

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    So you guys have an idea of what PE Bore and BE Bore are and for anyone that doesnt know what a rod looks like.

    PE Bore - end that attaches to the piston

    [​IMG]

    BE Bore - the end that attaches to the crank

    [​IMG]

    F23 Crower Rod

    [​IMG]
     
  8. thejameshimself

    thejameshimself Well-Known Member

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    ...someone needed and excuse to show off their new rods
     
  9. BlkCurrantKord

    BlkCurrantKord Super Moderator

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    Nah, I've had em for almost a year now and have posted them before.
     
  10. Roadrage

    Roadrage Well-Known Member

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    Lol
     
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