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how to calculate compression ratio

Discussion in 'Members' Lounge' started by reckedracing, Dec 16, 2004.

  1. reckedracing

    reckedracing TTIWWOP VIP

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    4 cyl
    2.2 liter displacement
    225 psi compression test...

    anyone know how to calculate the CR?

    its a 2001 H22A4, but a motor builder told my friend he had 11:1 compression which would be a typeS...
     
  2. pissedoffsol

    pissedoffsol RETIRED

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    bullshit. theres not direct number coorelation.

    10.6:1 vs 11:1 is negliable at ebst
     
  3. brian11to1

    brian11to1 Senior Member

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    Im confused.... help meh
     
  4. B16

    B16 Super Moderator VIP

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    i get 280psi on 1.8L b18cR with 12.3:1 pistons. but you cannot get your CR from a compression test.
     
  5. JDMilan

    JDMilan Senior Member

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  6. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    My cheapo 300psi gauge is pegged after 4 pumps.... :(
     
  7. B16

    B16 Super Moderator VIP

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    mine maxes at 300psi also :)
     
  8. hcivic.com

    hcivic.com Senior Member

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    the only real way is to cc the block and head if youve got it apart it takes 10 mins to do
     
  9. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    :werd:
     
  10. Slammed90Lude

    Slammed90Lude Senior Member

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