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    Getting ready to have the motor and trans bought from RVAE34. The motor is 57k mile 86 NA. Trans is auto. Replacing an 86t motor and trans. Will be transferring all turbo necessities and go fast parts from the 86t to NA motor. Aside from lowering boost for the NA motor is there any other things to know going in?
    1986zxt w/ 86 na engine K&N, 3" CM turbo-back, Eibachs, KYBs, FMIC, Turbosmart MBC/8 lbs, recirculating BOV, ASCO plenum, dual fans, Maxima alt, Champion 3 row
    2013 Ford Taurus SHO Performance Package

  • #2
    Good time to install an intercooler?

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    • #3
      https://youtu.be/iJa5qr4RIIM


      https://youtu.be/d8SLOrp0Wrw


      This is N/A motor with over 200k & pistons that had been nicked by valves. It's still running all these years later. It's been running on the same na motor for almost a decade. The 2nd video from last month. Made 450whp on only 15lbs. Just make sure you have supporting mods prior to checking the boost up.

      Originally posted by Racinjitter
      :lol: Those of us who say A/C FTW all have a g/f or wife. ac+women=more quiet=possibility of sex. -
      ac+women=SUPER BITCHING=no sex.

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      • #4
        Originally posted by Reds89 View Post
        Good time to install an intercooler?
        An intercooler was installed 3+ years ago. Guess I forgot to list it in my mods
        1986zxt w/ 86 na engine K&N, 3" CM turbo-back, Eibachs, KYBs, FMIC, Turbosmart MBC/8 lbs, recirculating BOV, ASCO plenum, dual fans, Maxima alt, Champion 3 row
        2013 Ford Taurus SHO Performance Package

        Comment


        • #5
          Originally posted by nismo kid View Post
          https://youtu.be/iJa5qr4RIIM


          https://youtu.be/d8SLOrp0Wrw


          This is N/A motor with over 200k & pistons that had been nicked by valves. It's still running all these years later. It's been running on the same na motor for almost a decade. The 2nd video from last month. Made 450whp on only 15lbs. Just make sure you have supporting mods prior to checking the boost up.
          That's what I'm talking about. Positive juju right there. What is a safe boost range for the NA motor with the mods I have currently?

          The only issue with my current setup aside from the jacked up motor is cooling. My lip/spoiler was modified a bit to fit to fit the intercooler in. I believe this modification interrupted airflow to the rad. I'm going to modify the lip to increase airflow to the rad along the way.
          Last edited by 1986zxt; 05-16-2018, 11:32 AM.
          1986zxt w/ 86 na engine K&N, 3" CM turbo-back, Eibachs, KYBs, FMIC, Turbosmart MBC/8 lbs, recirculating BOV, ASCO plenum, dual fans, Maxima alt, Champion 3 row
          2013 Ford Taurus SHO Performance Package

          Comment


          • #6
            Now I'm gonna have to look up flawlez's build for that 450 HP. Volumetric efficiency has to be up there for that much HP on 15 PSI.
            '88 300zx 2+2-- Under the knife
            '17 Altima SL
            '17 NV passenger-- The paddy wagon--

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            • #7
              Volumetric efficiency? Pfffft.

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              • #8
                My *build* thread is really old and not very updated. The whole build thread thing wasnt nearly as common when I started with my car 13 years ago.
                https://z31performance.com/forum/z31...-manifolds-mod
                Originally posted by Andrew84zx
                tell her your car is so fast it will make her panties fly off
                545 RWHP & 540 RWTQ
                VG30ET.com Member

                Comment


                • #9
                  What is a safe boost level with the na motor with my listed supporting mods? FMIC, K&N intake, recirc. BOV, ASCO Gutted Plenum,Champion 3 row rad, CM 3". Currently set for 8lbs of boost
                  1986zxt w/ 86 na engine K&N, 3" CM turbo-back, Eibachs, KYBs, FMIC, Turbosmart MBC/8 lbs, recirculating BOV, ASCO plenum, dual fans, Maxima alt, Champion 3 row
                  2013 Ford Taurus SHO Performance Package

                  Comment


                  • #10
                    If you have the IC you're gonna run out of fuel before anything else. 12psi seemed to be my limit for safe AFRs with stock tune on a VG33, you could probably go a little higher on a VG30. but honestly if you're wanting more than you'll get at 10PSI you should be thinking of upgrading injectors and getting into nistune anyway.

                    edit: not sure if you did anything with your motor before you went na2t, but my personal experience was that I had my old na2t VG30 running nicely at 7-8 psi for 15k miles and when I went to 10-12 I blew ring seal on two cylinders pretty quick. I'm not 100 per cent sure it was the original motor in the car so I can't say how many miles it had on it, but the compression had been good before. Dunno if this has happened to anyone else.
                    Last edited by FrozenZ; 06-26-2018, 07:58 PM.

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                    • #11
                      Motor was described as a 56,000 mile motor at purchase. Leak down test on the VG30 was very good. Were you on stock turbo injectors when you increased boost to 10-12? Appreciate the info. I'm not wanting to push any limits.
                      1986zxt w/ 86 na engine K&N, 3" CM turbo-back, Eibachs, KYBs, FMIC, Turbosmart MBC/8 lbs, recirculating BOV, ASCO plenum, dual fans, Maxima alt, Champion 3 row
                      2013 Ford Taurus SHO Performance Package

                      Comment


                      • #12
                        Originally posted by 1986zxt View Post
                        Motor was described as a 56,000 mile motor at purchase. Leak down test on the VG30 was very good. Were you on stock turbo injectors when you increased boost to 10-12? Appreciate the info. I'm not wanting to push any limits.
                        Yeah, stock everything except an AFPR, wideband, and a and boost controller.. This wasn't a detonation thing though, this was just a tired motor thing, AFRs were always fine. If a motor's been running under a certain set of mechanical conditions for 80K and 30 years and then you change those conditions significantly, stuff might go wrong. Even the newest junkyard VG30/33 is going to be close to 20 years old at this point and any motor that was ever in a z31 is at least 30. I rebuilt the VG33 I have in my car now when I put it in, and it's been a champ at 12psi for 10K miles.

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