2007 MS3 Engine Compressions

Discussion in 'Mazdaspeed 3/6 Engine' started by iamjhonrey, Jul 28, 2019.

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  1. iamjhonrey

    iamjhonrey Greenie N00B Member

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    I did a compression test on my 07’ ms3 which i just bought a month ago. I’d like to know if any of you guys know the oem specs of engine cylinder compressions? I’ve seen guys getting 160-175. I mean, more than 100 is good and the main point is the variation each or the lower and higher number shouldn’t be 10%-15%. Am I good for modding? Car has already sri, catless 3” straight pipe and hpfp. Should be good to get it tune with accessport next right?


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    iamjhonrey, via a mobile device, Jul 28, 2019
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  2. Raider

    Raider Administraider Administrator Platinum Member

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    How many miles?
     
    Raider, via a mobile device, Jul 28, 2019
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  3. iamjhonrey

    iamjhonrey Greenie N00B Member

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    118 miles


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    iamjhonrey, via a mobile device, Jul 28, 2019
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  4. Awafrican

    Awafrican Gold Member

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    How'd you find an '07 with only 118 miles? That things brand new! Oh you mean 118k. numbers are all the "same" so you should be good to tune, just make sure you've got fresh properly gapped plugs before you to tune.
     
    Awafrican, via a mobile device, Jul 28, 2019
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  5. Raider

    Raider Administraider Administrator Platinum Member

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    It's not the greatest compression, but I would make sure the vvt and timing chain are replaced first. 120k mile life.
     
    Raider, via a mobile device, Jul 28, 2019
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  6. JohnnyTightlips

    JohnnyTightlips Platinum Member

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    I would see if you could borrow another tester from someone else. It's possible it is just reading low. You will want to check your vvt and look at cleaning the valves at some point. Injector seals and Pressure relief valve would be something to also keep an eye on.
     
    JohnnyTightlips, Jul 29, 2019
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