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Boost question

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  • zbrownZ Offline
    zbrownZ Offline
    zbrown
    wrote on last edited by
    #2

    Wtf does that first sentence even mean?

    rx7-8.89@157mph
    12v dodge, twins

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    • PSiedTSiP Offline
      PSiedTSiP Offline
      PSiedTSi
      wrote on last edited by
      #3

      zbrown;324959 wrote:
      Wtf does that first sentence even mean?

      No kidding.

      So....you are only boosting 4psi but the wastegate is supposed to be 8-9psi? The only way limp mode kills boost is if it has a boost solenoid.

      At first I did it for fun, then I realized I made the investment and had to do it!

      92 Talon AWD 6/4bolt [EMAIL="[email protected]"][email protected][/EMAIL]
      95 240SX SE SR20DET [EMAIL="[email protected]"][email protected][/EMAIL]
      1993.5 Supra Hardtop...Sold
      Next project? 6cyl, 6spd?

      > spanish-rice;237125 wrote:
      > at first i thought the title said beer truck drivers needed... In which case i accidently put my two weeks in at work.

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      • DelSlowD Offline
        DelSlowD Offline
        DelSlow
        wrote on last edited by
        #4

        Put a manual boost controller on it and turn it all the way up. Tune off sounds.

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        • JN210J Offline
          JN210J Offline
          JN210
          wrote on last edited by
          #5

          Means that a stock Z31 turbo is normally around 8-9psi and is normally what everyone runs, Im only curious as to why mine is at 4. I will probably just end up getting a controller and bringing it up to where I want it. I was just wondering if there was something I hadnt checked yet. No boost solonoid on this car...so perhaps it is in its own way "unhappy" and I am just going to manually bring it up anyway.

          *1989 Nissan 300ZX Z31 *
          legacy image
          > DelSlow;262050 wrote:
          > I like the new JN210

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          • PSiedTSiP Offline
            PSiedTSiP Offline
            PSiedTSi
            wrote on last edited by
            #6

            JN210;324965 wrote:
            Means that a stock Z31 turbo is normally around 8-9psi and is normally what everyone runs, Im only curious as to why mine is at 4. I will probably just end up getting a controller and bringing it up to where I want it. I was just wondering if there was something I hadnt checked yet. No boost solonoid on this car...so perhaps it is in its own way "unhappy" and I am just going to manually bring it up anyway.

            No. Just no. Do the stock Z31's have a boost control solenoid? I'd assume wastegate is 8psi...if it's not building that much, you probably have a massive leak you can't see(pressure test the system, don't just do a visual test!!!!!!!!!!!!!!!!!!!!!!!!!!!), or your turbo is fucked.

            At first I did it for fun, then I realized I made the investment and had to do it!

            92 Talon AWD 6/4bolt [EMAIL="[email protected]"][email protected][/EMAIL]
            95 240SX SE SR20DET [EMAIL="[email protected]"][email protected][/EMAIL]
            1993.5 Supra Hardtop...Sold
            Next project? 6cyl, 6spd?

            > spanish-rice;237125 wrote:
            > at first i thought the title said beer truck drivers needed... In which case i accidently put my two weeks in at work.

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            • JN210J Offline
              JN210J Offline
              JN210
              wrote on last edited by
              #7

              hmm, wouldnt I be able to hear the leak though? I MIGHT know what I have to do, but I just cant see how any air could escape from how tight the coupler is, but I could put a T-bolt clamp over it though and see what happens.

              *1989 Nissan 300ZX Z31 *
              legacy image
              > DelSlow;262050 wrote:
              > I like the new JN210

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              0
              • RexwagonR Offline
                RexwagonR Offline
                Rexwagon
                wrote on last edited by
                #8

                did u hook the wastegate back up?

                u will have to pressure test it for any leaks. u can build a tester out of pvc piping and an air valve. then use a compressor to pump air in.

                legacy image

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                • RexwagonR Offline
                  RexwagonR Offline
                  Rexwagon
                  wrote on last edited by
                  #9

                  http://z31.com/faq/turbo.faq.shtml

                  4psi is stock according to here. sounds like wastegate pressure is up to 5psi

                  no offense jeff but 2 mins of google told me that. if it is correct. lol

                  legacy image

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                  • JN210J Offline
                    JN210J Offline
                    JN210
                    wrote on last edited by
                    #10

                    lol, hmm...interesting...so I guess everything is in proper operating order then and I have nothing to worry about. thanks derrick.

                    *1989 Nissan 300ZX Z31 *
                    legacy image
                    > DelSlow;262050 wrote:
                    > I like the new JN210

                    1 Reply Last reply
                    0
                    • RexwagonR Offline
                      RexwagonR Offline
                      Rexwagon
                      wrote on last edited by
                      #11

                      it may be working but 4psi is pretty low. u need more boost, period.

                      legacy image

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                      • JN210J Offline
                        JN210J Offline
                        JN210
                        wrote on last edited by
                        #12

                        Rexwagon;324971 wrote:
                        it may be working but 4psi is pretty low. u need more boost, period.

                        agreed! lol

                        *1989 Nissan 300ZX Z31 *
                        legacy image
                        > DelSlow;262050 wrote:
                        > I like the new JN210

                        1 Reply Last reply
                        0
                        • DaveHD Offline
                          DaveHD Offline
                          DaveH
                          wrote on last edited by
                          #13

                          Pull the hose off of the wastegate and let it eat!

                          😄

                          (j/k btw, don't do that)

                          Rexwagon;324971 wrote:
                          it may be working but 4psi is pretty low. u need more boost, period.

                          DaveH
                          '94 Supra- 7.77 @ 176mph

                          legacy image

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