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P30 pistons in B18C5 block?

Discussion in 'Engine Building' started by B16, Aug 9, 2005.

  1. B16

    B16 Super Moderator VIP

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    Hey guys, I'm about to rebuild my motor after destroying my block and #4 piston. So, therefore I need new pistons. I would like to build this motor within the Honda Challenge rules which require OEM bottom end components. I would like to throw in P30 JDM B16 pistons in a B18C5 block with stock R rods and crank. Has anyone done this, with any B16 pistons (non pct)? Will the rods fit with the piston? Or is there modification needed? If so, what modification?
    Thanks!
     
  2. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    i know the JDM B16 pistons fit directly on the LS rods and that the LS rods are a different thickness than the GSR or ITR rods... so it definatly isnt going to be a direct fit
    thats about all the help i have for ya though :)
     
  3. B16

    B16 Super Moderator VIP

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    But, what is the difference in the thickness? Thicker or thinner? Rod or piston?
     
  4. civicious

    civicious FüK-VTEC VIP

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    LS and B16 rods are fatter on top than GSR/ITR/CTR's, so the opening on the piston is wider. To put GSR/ITR/CTR pistons on LS/B16 rods, you've got to either shave about a millimeter off either side of the top of the rod, or remove the same amount from the inside of the piston.

    When you're doing the reverse of that though (B16/LS pistons onto a GSR/ITR/CTR rod), the rod is narrower than the opening in the piston, so it'll fit without any modifications.

    :)
     
  5. civicious

    civicious FüK-VTEC VIP

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    [​IMG]

    somethin like that
     
  6. B16

    B16 Super Moderator VIP

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    Thanks yo!
    It shouldn't be a problem if there is more clearance; I don't think?
     
  7. pissedoffsol

    pissedoffsol RETIRED

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    why not just run some jdm p73's? should put you in the low 11:1's.
     
  8. B16

    B16 Super Moderator VIP

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    If I can get a little more compression, it would be nice :)
     
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