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h22a/a4 head differences

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    #1

    h22a/a4 head differences

    I just finished building my h22a4, Including swapping in a set of jdm h22 pistons for a bump in compression.. I was also told that the combustion chamber on the a4 head is lower to the deck? any one have physical proof of this? My motor is all put together and running now so im not gonna tear it apart to compare to my jdm head. Im trying to see what my ending compression ratio is.. if the heads ARE different that will change the end result. The pistons are definately different (which i knew) vv usdm a4 in front, jdm in back






    so does anyone have proof of different sized combustion chambers?

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    #2
    no one? if you have an h22a4 head maybe you can take some measurements for me? ill then compare to my jdm head i have laying here

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      #3
      You could check the helms manuals specifications section, i believe you may find what your looking for if you take the measurements from the jdm and compare the data to the manual. If i found this thread sooner i would of gladly would of done the measurements. I to am building a h22a4 while simultaneously working on a h22a, but there put together. Hope that helps

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        #4
        the head chambers are the same CC.
        www.850fab.com
        IG - @850Fab
        FB - @850Fabrication

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