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4g63 pistons?????

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    #1

    4g63 pistons?????

    i read a thread sayin that some1 used mitsu 4g63 pistons in their build...my questions are:

    1) how difficult is this?
    2) what type of modifications do i have to do to make this work
    3) are the pistons forged? the 4g63 is a turbo engine so i would guess yes..

    i only asked this because my cousin has a spare 4g63 block with good pistons
    Tags: None
    #2
    The amount of custom work necessary to make them fit properly would be considerably more than simply installing pistons designed for your engine. The potential for failure, especially since you are inexperienced, is going to be considerably higher.






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      #3
      Originally posted by deevergote View Post
      The amount of custom work necessary to make them fit properly would be considerably more than simply installing pistons designed for your engine. The potential for failure, especially since you are inexperienced, is going to be considerably higher.
      i searched around and the 4g63 has the same bore of 85mm but i am unsure of the pin diameter

      Comment

        #4
        The bore is the same, yes... but when you replace the pistons in a 20 year old motor, you have to hone the sleeves. This will widen the bore slightly. Additionally, used pistons (that may be 20 years old themselves) will also have their share of wear.
        Putting used 85mm pistons into a used 85mm block that has been properly prepared will most likely result in a very loose fit... you'll blow that up pretty quickly!

        Brand new replacement 4G63 pistons that are slightly oversized would be a better option... but if you're doing that, you're better just getting inexpensive aftermarket stuff that is designed for the F22A.






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          #5
          I was just reading about this earlier on hater-tech.

          http://honda-tech.com/showthread.php?t=2546957


          Member's Ride Thread

          Originally posted by mercyboy
          I'd rather lose by a mile because I built my own car then win by an inch because someone else built it for me..your car is your story, so don't let someone else write the book!

          Comment

            #6
            The 4G63 pistons, as said many times anywhere this topic is discussed, are the 1.130" compression height aftermarket versions. These were designed to be used with the 100mm stroker crankshaft. You cannot use factory 4G63 pistons unless you're trying to aerate your cylinder head by punching holes in it. Like Deev said, you don't have the know-how to accomplish this even with the right parts, it sounds.
            My Members' Ride Thread - It's a marathon build, not a sprint. But keep me honest on the update frequency!

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              #7
              4g63 is a horrible motor anyway. I wouldn't even use the oil cap if it fit.
              98' Mustang 3V Swap
              11' VW CC R36

              Comment

                #8
                Originally posted by gotz Cb7 View Post
                4g63 Is A Horrible Motor Anyway. I Wouldn't Even Use The Oil Cap If It Fit.
                Rofl

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