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2G Compression #'s

Posted by Tyler Davis, Feb 18, 2020

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  1. Tyler Davis

    Tyler Davis Probationary Member

    22
    1
    Joined Feb 18, 2019
    Kenosha, Wisconsin
    Just did a compression test before I put any power to this car and on my 7 bolt 2G we got 182-182-180-179 ,how’s that sound? I thought the ideal numbers were 178 but I don’t really know how big a difference it makes
     

    Street Build 142  1

    1998 Mitsubishi Eclipse Spyder GST
    fwd · automatic · 2G DSM
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  2. rabenne

    rabenne Proven Member

    1,205
    379
    Joined Apr 21, 2006
    Racine, Wisconsin
    LOL if they arent 178 psi exactly your engine is junk. Sell it to me for $50?
     

    74  5

    2008 Lancer Evolution MR
    awd · automatic · Lancer Evolution

    Street Build 7K  16

    1995 Eagle Talon TSi
    awd · manual · 2G DSM

    Street Build 405  5

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
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  3. rabenne

    rabenne Proven Member

    1,205
    379
    Joined Apr 21, 2006
    Racine, Wisconsin
    Sorry, couldn't help myself...

    Different gauges will read differently.... You are looking for consistency more than anything. They should all be within 10% of each other, which they are...

    If you were reading 112-112-110-109, there might be concern for low compression, but at around 180ish you are sitting pretty... SEND IT!
     

    74  5

    2008 Lancer Evolution MR
    awd · automatic · Lancer Evolution

    Street Build 7K  16

    1995 Eagle Talon TSi
    awd · manual · 2G DSM

    Street Build 405  5

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
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    1990TSIAWDTALON and Tyler Davis like this.
  4. Tyler Davis

    Tyler Davis Probationary Member

    22
    1
    Joined Feb 18, 2019
    Kenosha, Wisconsin
    Lmao for sure
     

    Street Build 142  1

    1998 Mitsubishi Eclipse Spyder GST
    fwd · automatic · 2G DSM
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  5. Tyler Davis

    Tyler Davis Probationary Member

    22
    1
    Joined Feb 18, 2019
    Kenosha, Wisconsin
    Yeah I figured I was all good just making sure I know these cars tend to be bipolar
     

    Street Build 142  1

    1998 Mitsubishi Eclipse Spyder GST
    fwd · automatic · 2G DSM
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  6. Widgmaster

    Widgmaster Supporting VIP

    56
    131
    Joined Aug 24, 2018
    Sarnia, ON, Canada
    Some times you have to be bipolar to own one. Did some one mention you where selling this car . Oh wait .. that`s my bipolar kicking in .. Sorry
     

    54  1

    2002 Dodge Dakota Extended Cab
    rwd · automatic · Misc Vehicles

    197  8

    2001 Mitsubishi Eclipse Spyder GT
    fwd · automatic · Misc Vehicles
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    Tyler Davis likes this.
  7. biglady112

    biglady112 Proven Member

    1,221
    181
    Joined May 20, 2004
    Commerce City, Colorado
    110psi is not abnormal for some folks. I see those numbers all the time at my altitude. Our Mirage makes 900whp and the compression is 110-115psi across the board. Living at 6000ft is great.
     
  8. motomattx

    motomattx Proven Member

    2,206
    851
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Carbon buildup will increase compression a little also, but you are good to go, full send!
     

    Drag Race Build 3K  24

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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    Tyler Davis likes this.
  9. rabenne

    rabenne Proven Member

    1,205
    379
    Joined Apr 21, 2006
    Racine, Wisconsin
    that's why I said "might"
     

    74  5

    2008 Lancer Evolution MR
    awd · automatic · Lancer Evolution

    Street Build 7K  16

    1995 Eagle Talon TSi
    awd · manual · 2G DSM

    Street Build 405  5

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
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