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what pistons will lower gsr compression?

Discussion in 'Engine Building' started by stmotorsports, Jun 23, 2006.

  1. stmotorsports

    stmotorsports Senior Member

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    Any of you guys who know me know I've been a d-series head for awhile now so sorry for the b-series noob q...
    I'm considering doing a f/i gsr in my next civic but want to drop the compression to around 9.5:1. Has anyone done this? What pistons will work if any?
     
  2. K2e2vin

    K2e2vin Senior Member

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    LS pistons will yield ~9.32:1 CR with the OEM 3-layer gasket.
     
  3. 97CTR

    97CTR Senior Member

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    Run the gsr pistons with a thicker headgasket.
     
  4. johnercivic

    johnercivic New Member

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    True, GSR doesn't have that high of a compression to begin with, less work too.
     
  5. stmotorsports

    stmotorsports Senior Member

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    oh yeah I forgot the usdm version is only 10:1, I was thinking of the jdm version that is 10.6:1

    I guess I would just have to make sure to get the usdm engine with the jdm trans...

    so what headgasket is thicker and wouldn't blow out all the time under around 10-11psi boost? And what would it drop the compression to?

    And if I did decide to go with different pistons, the LS ones will fit? I figured they would be different comp height or something due to the differences in stroke, but guess not...?
     
  6. 97CTR

    97CTR Senior Member

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  7. 97CTR

    97CTR Senior Member

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