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B18B1

Discussion in 'Engine Building' started by korey, Apr 14, 2004.

  1. korey

    korey Senior Member

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    A while ago some poeple on here told me that JDM P30 pistons will fit right and yield 11:1 comp. ratio on my b18b1. Today some friends told me that PR3 (Civic SI?) pistons would yield the same results? Is this true. A friend is selling them for $50 which I think is a good deal. Let me know if this will work or not so I can decide. Thanx.
     
  2. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    PR3 will yeild 10.8:1
    P30 will yield 11:1

    for $50 get the PR3... you can make up the .2:1 difference somewhere else
     
  3. brian11to1

    brian11to1 Senior Member

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    with a thinner headgasket...
     
  4. reckedracing

    reckedracing TTIWWOP VIP

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    or no head gasket :lol:
    bahahaha

    just kidding, don't try this
     
  5. korey

    korey Senior Member

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    With thinner head gasket the pr3 pistons will be 10.8:1? What headgasket should I use then instead of the oem gaskets?
     
  6. brian11to1

    brian11to1 Senior Member

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    2 Layer Headgasket w/P30 (JDM B16A) on the stock bore 81 and stroke 89 w/stock piston to deck hieght on a B18B will yeild 11.299:1. Or 11.3:1

    2 Layer Headgasket w/PR3 (B16A) on the stock bore 81 and stroke 89 w/stock piston to deck hieght on a B18B will yeild 11.091:1. Or 11.1:1

    2 Layer Headgasket w/PCT (B16B) on the stock bore 81 and stroke 89 w/stock piston to deck hieght on a B18B will yeild 11.708:1. Or 11.7:1
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    1 Layer Headgasket w/P30 (JDM B16A) on the stock bore 81 and stroke 89 w/stock piston to deck hieght on a B18B will yeild 11.6:1. Or 11.6:1

    1 Layer Headgasket w/PR3 (B16A) on the stock bore 81 and stroke 89 w/stock piston to deck height on a B18B will yeild 11.380:1. or 11.4:1

    1 Layer Headgasket w/PCT (B16B) on the stock bore 81 and stroke 89 w/stock piston to deck hieght on a B18B will yeild 12.034:1. Or 12:1

    http://www.c-speedracing.com/howto/compcalc/compcalc.php

    Just thought I'd help ya'.
     
  7. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    no the PR3 will yeild a 10.8:1 with the OEM head gasket

    he is saying you could (more than) make up for the .2:1 difference with a thinner head gasket
     
  8. brian11to1

    brian11to1 Senior Member

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    I hope that helps and makes sense...
     
  9. korey

    korey Senior Member

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    Thats helps alot. Thanx for the site too. Awesome.
     
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