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2JZR31 into the 11's

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    #106
    firstly, that calc sucks. Use this one http://www.car-videos.com/tools/speedrpm.asp

    2.804
    1.531
    1
    .704

    are the a340e gears. Might be "slightly" different depending on model but the 1:1 3rd is what you really need to look at anyway.

    re accuracy of autos: When I put in my old figures it says 105.7@7000rpm and 113.2@7500rpm. I don't know exactly what speed I was at at what rpm but my highest trap was only 108mph and that was when I changed to OD and it stayed at 5200rpm. This says that my stock converter was slipping about 3.2%.

    So my slippage doesn't seem to be as much as yours.

    Are you going to chop the wire that locks up via ecu or rig something up so you can just enable it when you want it?

    I have mine manually lockable but I haven't done it on the dyno or track as I suppose I am a bit scared
    state street drift champion 2003

    Formerly known as bassaholic55

    Comment

      #107
      I have locked it on the dyno with a stock converter. And if Mike from MV says you can lock it under power in 3rd that is good enough for me.

      Chris I am just using 1:1 for 3rd.
      10.83 @ 125

      Quickest stock exhaust manifold stud 2JZ in Aus.

      Originally posted by cracka
      Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

      Comment

        #108
        The guy that rebuilt my auto didn't want me locking it in 3rd, but he is anal about his gearbox rebuilts, have to be perfect. I lock it up all the time with WOT and it hasn't failed. On my standard box, when it failed, it was the clutchs in the box, rather than the converter that eventually slipped. I plan on giving lock up in 2nd and 3rd a try down the quarter for next time I run at wsid.

        Oh and love the drag runs, got big top end
        Nissan 200sx 97 S14a - Stolen
        Toyota Soarer 91 JZZ30 - 11.423@118.94mph 1.587 60ft
        Subaru Impreza WRX CS10 MY10 - Stock with roof racks

        Comment

          #109
          Cheers man. If only I had your 60 footer's!

          I can't see how locking the clutch could hurt the trans unless it changed gear when locked. The fluid coupling of the converter wouldn't be there to cushion the impact of a change so it could smash the sprags or something.

          I have a lock up switch. I behaves oddly. If I lock it and put it into D then drive off, it will be locked in 2rd 3rd and 4th, and possibly even first. But if I lock it then change into second or first it will automatically unlock, then lock back up in 3rd and 4th. I drive everywhere like this, changing to 2nd to slow down so it doesn't stall, and I allow changes from 3rd to 4th when locked (but back off the accelerator when it changes).
          10.83 @ 125

          Quickest stock exhaust manifold stud 2JZ in Aus.

          Originally posted by cracka
          Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

          Comment

            #110
            I suspect that is the transmission ecu overriding the lock up. I run a suprastick v4 which is a standalone tranny ecu, and it can lock up 1st, but it can't stay locked if throttle goes below 5%. It only stays locked when throttle is below 5% when in 4th. I lock 3rd and 4th on the street at 52km/h(configurable). I also have a switch that can lock up in any gear when rpm is below a certain point (configurable), my one is set to 1100rpm. Use it for dyno runs. I have driven on the street like this and its very weird having lock up engaging and disengaging all the time. I've got manual mode as well.

            Problem is lockup clutchs on autos are small relative to manual clutches. They aren't designed to be turned on at WOT, however they seem to be able to take it on a340e boxes. With my stall converter upgrade I've actually got an uprated lockup clutch as well from MV autos.
            Nissan 200sx 97 S14a - Stolen
            Toyota Soarer 91 JZZ30 - 11.423@118.94mph 1.587 60ft
            Subaru Impreza WRX CS10 MY10 - Stock with roof racks

            Comment

              #111
              what kind of auto do you have in there series 1/2/3 have a torque converter clutch lockup trigger wire on the auto ecu

              Comment

                #112
                I can't see how the transmission ECU can override the lockup since I am directly activating the lockup solenoid. I think there is a hydraulic circuit in the valve body which won't allow pressure to the clutch unless the shifter is in D. Remember my trans has quite a few differences to the 1JZ unit.
                10.83 @ 125

                Quickest stock exhaust manifold stud 2JZ in Aus.

                Originally posted by cracka
                Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                Comment

                  #113
                  my shifter doesn't function like a normal shifter, ie, 1 and 2, and OD don't do anything, only drive, reverse, neutral and park work.
                  Nissan 200sx 97 S14a - Stolen
                  Toyota Soarer 91 JZZ30 - 11.423@118.94mph 1.587 60ft
                  Subaru Impreza WRX CS10 MY10 - Stock with roof racks

                  Comment

                    #114
                    That means that you can probably lock it in second then
                    10.83 @ 125

                    Quickest stock exhaust manifold stud 2JZ in Aus.

                    Originally posted by cracka
                    Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                    Comment

                      #115
                      I can, all done in the suprastick v4 ecu.
                      Nissan 200sx 97 S14a - Stolen
                      Toyota Soarer 91 JZZ30 - 11.423@118.94mph 1.587 60ft
                      Subaru Impreza WRX CS10 MY10 - Stock with roof racks

                      Comment

                        #116
                        Them cool those things
                        10.83 @ 125

                        Quickest stock exhaust manifold stud 2JZ in Aus.

                        Originally posted by cracka
                        Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                        Comment

                          #117
                          Yeah Im thinking of using one just to ease the wiring :/
                          I own a two and a half litre Commodore

                          Comment

                            #118
                            Bah stop bitching about the wiring :p
                            10.83 @ 125

                            Quickest stock exhaust manifold stud 2JZ in Aus.

                            Originally posted by cracka
                            Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                            Comment

                              #119
                              Wait until you hear me bitch when I start on it...
                              I own a two and a half litre Commodore

                              Comment

                                #120
                                Its pretty bad already and you haven't even picked up cutters yet. :p
                                10.83 @ 125

                                Quickest stock exhaust manifold stud 2JZ in Aus.

                                Originally posted by cracka
                                Some conclusions empirically were that a large protruding ridge like a prolapsed arsehole around the runner was largely beneficial.

                                Comment

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