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Thread: subaru piston vs honda pistons, subaru ftw

  1. #1
    Owner AutoMods's Avatar
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    subaru piston vs honda pistons, subaru ftw

    Quite a size difference here.

    ej22 2.2 liter subaru 97.5mm pistons
    vs
    1.6 liter d16y8 75.5mm honda pistons

    9.875@150mph
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  2. #2
    Senior Member Sleepy's Avatar
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    That is a huge size difference. What is the size difference from the subaru to a lsx?

    When I worked at JR Motorsports back in the day I always found it funny how huge bbc pistons and rods were. Back then I was comparing it to modular ford stuff too.
    96' 2.4 Neon
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  3. #3
    Owner AutoMods's Avatar
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    my 6.0 liter has a 4" bore so 101.6mm, not a huge increase over the subaru. but twice as many slugs. and longer stroke

    ls2 6.0 has 101.6mm bore 3.622 stroke
    b16 honda is 81mm and 3.047 stroke
    d16 honda is 75mm and 3.543" stroke
    subaru ej22 is 97mm and 3.110 stroke or 99.5mm for the 2.5 sti (same stroke)

    interesting to see honda have two 1.6 liters with very different strokes and piston sizes

  4. #4
    Senior Member Sleepy's Avatar
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    Srt is at 87.5. Not quite the D series baby pistons but no ls2 monsters either.

  5. #5
    Moderator (Night Patrol) Domestic Disturbance's Avatar
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    I have a Cummins piston i could bring over for comparison.
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