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If you can bore a 30 to a 33 then in theory...

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  • If you can bore a 30 to a 33 then in theory...

    You could take The DETT and bore it to a 3.3liter also right. I'v "heard" the only difference in the blocks is the head pattern. So if one were to bore out DE block to 3.3 liters then they would have to reshape the quench area of the head accomodate the larger bore and they would also have to have custom head gaskets made right?

    Anyone know anything about this? Or are the water passages on the DE block closer to the cylinder for some odd reason.

    The reason I'm asking is cause I've got a DETT sitting in the garage that is waiting to be rebuilt. If I'm gonna go with custom pistons why not go the 3.3 liter route and just have custom copper gaskets made too? Any takers?
    85 Z31 6.0 LSX turbo 766whp/792wtq
    04 GTO, LS6, big cam, porting, N20... underway for summertime daily driver.

  • #2
    I think i heard about Jun stroker kits for that.

    Terrible idea putting those wheels on...

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    • #3
      I am not sure. It seems the only bored out VG30DE(TT)s that I have seen are 3.1-3.2L. You may want to ask on http://www.twinturbo.net as they are the VG30DE(TT) gurus...
      " I don't want to come off sounding butt-hurt, but I really loathe most cressida owners and I'm glad I soiled their platform with a Nissan dinosaur under the hood." - Butter
      LaterZ

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      • #4
        I don't see how the logic would follow even if it were true...

        different castings, different design, there's no reason to think they are that similar in bore material thickness

        them most I've heard is

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        • #5
          MrwassmanNA2T wrote: I think i heard about Jun stroker kits for that.
          Yeah bro but I think Jun recalled them.

          The reason my handle here is VG36ET is because I had everything in the stroker kit but the pistons and rings to build an insane VG engine but then reality snaped and I realized that I never want to invest that much in an Interference engine. Maybe a custom 3.0L+ rb with Darton sleeves.

          Unless you have a bank account that can choke a hippo, Jun is insanely overpriced.

          To the subject @ hand. I wanna c more evidence of block integrity or lack their of after the overboring. I'm VERY confident that an NA VG34E would rock on for many moons but even with guys like Escorting racing making a buisness out of it I have reservations.

          Shite, if I'm gonna put custom forged BRC pistons I'm gonna do my standard .020 overbore to remove the *Lip* anyway. What's another .1L anyway on a boosted engine. It's surely cool to brag that you have a VG34ET but 33ET still has a nice ring to it.

          I just don't have the proper equipment to check block integrity. It's pure Cast Iron though, the stuff isn't weak but all it takes is one weak spot of course.

          As for the DETT, bad ass engines but complex. DOHC Cams from top Jap tuners and guys like jWT avergae 1200+.

          In all honesty Satan for your HP goals and wrenching ability I'd personally shit can the idea of a SOHC VG, I'm not saying said engine isn't gonna hold 900+ crank HP but I don't c the point in finding out the hard way if you already have the more complex and expensive engine to fuk with.

          Do both!
          Ucked Fup!!!

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          • #6
            VG36ET wrote: In all honesty Satan for your HP goals and wrenching ability I'd personally shit can the idea of a SOHC VG, I'm not saying said engine isn't gonna hold 900+ crank HP but I don't c the point in finding out the hard way if you already have the more complex and expensive engine to fuk with.

            Do both!
            I think that's the charm, the obsolete engine kicking ass

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            • #7
              Somebody needs to take a VG30E block, punch the cylinders 2mm out and then have the thickness of the cylinders check. Im willing to bet that 2mm on a Vg30e is really really pushing the limits of whats safe, expecially for a street car.
              Attached Files
              ""You gota watch out in this weather. Its when them white boys with their turbos come out to play" Mr. Rimpson - UTI Instructor, refering to a slightly damp 50 degree day.

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              • #8
                VG36ET wrote: I realized that I never want to invest that much in an Interference engine.
                It wouldn't be interference if you were to properly spec out some custom pistons. :wink:
                imagination is a virtue

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                • #9
                  Ok, well then I will ask this,

                  Does anyone have a VG33 that is tore down right now that can measure the distance from the closest water passage to the edge of the cylinder bore? I will compare that to what is currently available on the DETT block.

                  The reason I'm not useing the DE block in my car is because I didnt have it when I put all the money into my E block. Irronicaly after I poured all of my money into the E block, I went to the local nissan dealership and showed them my car last year and they said "WOW thats really cool, you should take this twin turbo engine that we pulled out of this guys car and rebuild it to see what you can do with it!" It figures.

                  Besides the DE block is going into the 240sx not the z. BUT like I said, if I'm going to buy custom pistons then might as well bore it for all its worth.
                  85 Z31 6.0 LSX turbo 766whp/792wtq
                  04 GTO, LS6, big cam, porting, N20... underway for summertime daily driver.

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                  • #10
                    Was looking at another site and a guy there says that the vg30e cannot be bored to 3.3 because on the VG33 they moved the water passages outward. Oh well.

                    Granted that has nothing to do with the DOHC engine but still.
                    85 Z31 6.0 LSX turbo 766whp/792wtq
                    04 GTO, LS6, big cam, porting, N20... underway for summertime daily driver.

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                    • #11
                      if you really think about it, the vg has a good stroke/bore ratio for good a wide power band, stroking it would move it down and unless it was very slight your reliability could very well suffer (more bearing and rod stress)

                      boring it just a bit will yield more overall power ... obviously within limits ... but you don't need much to get more power when you're boosted, 20cc at 190psi is quite a bit

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                      • #12
                        SATAN wrote: Was looking at another site and a guy there says that the vg30e cannot be bored to 3.3 because on the VG33 they moved the water passages outward. Oh well.

                        Granted that has nothing to do with the DOHC engine but still.
                        that is correct...I believe they also added several additional passages, however I cannot confirm this as I have never had one to tear down...point being I'm pretty sure somewhere around 3.1-3.2 is as far as you can take the original VG30E

                        1987 Nissan 300ZX Turbo (Budget Supercar)
                        1987 Nissan 200SX SE (Old School FR)
                        1994 Nissan Sentra SE-R (Balls To The Wall Track Car)
                        2000 Nissan Maxima SE (Daily Driver)
                        2006 Scion tC (Wife Whip)

                        In an ideal world I would have all ten fingers on my left hand, so my right hand could just be a fist for punching.

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