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Thread: Question about KA24 pistons in L28

  1. #1
    another classic car guy EricB's Avatar
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    Default Question about KA24 pistons in L28

    Hi all

    Based on this chart:
    http://www.zhome.com/ZCMnL/tech/128combo.html

    I've decided on going the 2949cc route by way of L28 block + L24 rods + KA24 pistons in STD 89mm width

    That chart lists part number 12010-40f10 for the std diameter 89mm unit and lists a zero cc dish volume. I assume that means these are flat top pistons.

    However when I look up this p/n I invariably find images of the dished Ka24de turbo piston

    And then when doing a similar p/n search on nismoparts.com I came across an advertised Ka24 flat top piston but with a slightly different part number: 12010-40f72


    Can someone confirm which is the right p/n before I place a non-returnable special parts order at the dealership please?

    Thx

    -e

  2. #2
    Registered User robftw's Avatar
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    Default

    zero cc dish volume should be flat tops, can you do a cross reference part search and check the nissan truck that came with the ka24 flattops stock?

  3. #3
    another classic car guy EricB's Avatar
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    D21 Trucks and S13 240SX with Ka24 engines use the flat top piston with p/n 12010-40f72

    Does that settle it then?

  4. #4
    Registered User robftw's Avatar
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    I dug this up from rockauto, these are the pistons you need.

    BECK/ARNLEY Part # 0125195

    SEALED POWER Part # H832CP

    DNJ ENGINE COMPONENTS Part # P616

    30$ each, beck arnley comes with rings.

  5. #5
    another classic car guy EricB's Avatar
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    BTW all I just heard back from Nissan

    Both pistons 12010-40F72 and 12010-40F10 are now NLA from Nissan/Nismo...

    F72 is the high perf flat top piston listed in the S13 section of the Nismo catalog

    F10 is the piston listed for use in the 2949cc L24rod/L28crank combination here http://www.zhome.com/ZCMnL/tech/128combo.html

    So aftermarket as listed above is the only way to go... bummer...

  6. #6
    Supporting Member Diseazd's Avatar
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    http://www.flickr.com/photos/1404980...7600346077563/
    ______________________________________________
    http://www.flickr.com/photos/1404980...7603350695459/

    70, 71, 2 72's, and a 73 240z....
    90 300zx and a 1996 Acura NSX.....but who's counting?

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