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    ECU Tunes and Installs

    I'm back from my day job and have a bit of a backlog to work through for ECU installs and wiring. I thought I might post some pics and details of how I install and tune on different cars and ECUs.

    Starting off with this 1JZ Soarer, running some cams, a new turbo, 6 boost manifold and a 1280 ECU. It did come in with a dead PowerFC, and had it not broken they are really capable ECU's if you can work around their idiosyncrasies. This one was faulty (Failed chip when warm causing hesitations), so we decided with the Adaptronic due to many factors.
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    The Adaptronic has 12 injector outputs, 8 ignitor outputs, 8 high current aux outputs, 8 digital inputs and 16 analogue inputs. The beaut thing about these ECU's is that the injector and ignition outputs can be re-purposed to high current aux outputs should you not have 12 cylinders. The wiring diagram does assign wires to specific roles like MAP and TPS to certain analogue inputs, but these too can be changed in software should you make a mistake wiring or want to do something different.

    I always start with a IO (Input/Output) count and either write it down, write it on the wiring diagram, or if the software allows, just enter it straight in to the ECU. After playing with the new Haltech range, they have this function now too. An IO count and diagram really helps you get your head around where to start and gives a good indication of progress.
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    From there I start wiring, usually ECU power, relays and anything 12v. With most modern ECU's, you can retain the standard EFI relays, ECCS etc etc sort of stuff and have it triggered by the ECU as if it was the stock ECU. This is a very nice way to do things, as it retains fuse/relay functions and wiring diagrams. Often you have to drive ECCS relays high, which is something some ECU's are not capable of doing without an interposing relay. The adaptronic can do it with the tick of a box in the software. Aux out 7 is used to turn on main efi relay in this car.
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    We are doing some cool things on this car. Turbo speed can be wired straight in to the ECU as a hall effect. Re-purposing VSS4(vehicle speed sensor) input, we are able to scan incredibly high frequencies and do simple calculations on them in the ECU to output turbo speed. This will later be used to dynamically check boost against turbo speed for compressor efficiency as a calculation within the ECU and for logging. Here you can see the logic change involved. This change had to be done in advanced view, as it is somewhat of a hack to the standard ecu firmware, simple never the less.
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    Another cool thing is oil pressure and fuel pressure. Using sensors mounted in the rail and the filter housing, pressures will be monitored and checked against a expected value for any given RPM or MAP and flash CEL or initiate fuel cut if out of tolerance. Fuel will be done by using a measured base fuel pressure and subtracting MAP from it. so if we say there is 270kPa of fuel pressure and we are 30 kPa on the MAP (70 kPa vacuum) then the fuel pressure should be 200kPa. This assumes a 1:1 fuel pressure regulator. If this doesn't work we can always do a log of fuel pressure and just use a 2D table to compare with. Oil pressure will be a 2D table of RPM vs pressure, and compared to actual pressure. A banjo bold was skillfully machined to fit a 1/8th sensor.
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    As always, triggering is very important and although this is a very well documented trigger system, I thought I would run through the motions of setting up triggering with an unknown CAS for demonstration. Using a scope, we can see the top wave as the crank wheel and the bottom wave as the cam reset wheel. The crank has many teeth and is used for high resolution fuel and timing triggering as the motor spins. The cam reset wheel is to tell the ECU that the engine is at TDC as a reset/refresh of the engine rotation counting. The bottom wheel alone, with no missing teeth, isn't helpful to the ECU without a reset pulse which the cam provides. Fun fact about the 1280 is that it has an internal scope on all calculations and IO. This is very handy as it lets you see engine angle count up while watching ignition, inject and CAS events. It's interesting to note the waveform rises first then sharply falls. If polarity was incorrect on the sensor, it would fall first then rise sharply. I wire in a rush and get this wrong seeming more than random chance would allow. My scope pic followed by the adaptronic internal scope and ignition/inj events.
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    This car is now running and after tomorrows road tune we will head to the dyno for a power run.
    Jason Broadhurst

    Someone once asked me if they could use my mower. I said "sure, so long as it doesn't leave my yard"

    #2
    Awesome. Very informative.

    Comment


      #3
      So much nerd. well done.

      Comment


        #4
        Cheers, mate, the way you sorted shit out on mine was awesome. Great to see in this level of detail.
        Originally posted by thebluerx7
        The fact they want to ban cash makes me want to go out and use it full time again now .

        Comment


          #5
          2 789's, bastard..... I want one of those, struggling to justify it though.

          Nice setup and rather informative.

          Comment


            #6
            I popped in during this install. I can confirm dr who and Star Trek were playing on the tv whilst Jason watched the owner work

            Comment


              #7
              Very cool, and relevant to my current interest!
              Pain is temporary, quitting is forever - Lance Armstrong (drug cheat)

              Comment


                #8
                Start a blog. Nekminnet: #tunedbybuthurts
                Pest Control - Brisbane, Gold Coast, Ipswich and South West QLD PF discounts apply.

                Comment


                  #9
                  Should really get you to spend a few hours fine tuning ute on street with me for super economy. Love it
                  Originally posted by Bosshoggett
                  If your planing to drive this on the road and enjoy it, id suggest a second opinion, someone with a history in Australian Rally or Fink River . If your just playing dyno comps. Then ok

                  Comment


                    #10
                    Great write up... Have been interested in the adaptronics for a while so keen to see more.

                    Comment


                      #11
                      Appreciate the insight.

                      Love the turbo speed measurement!!

                      Comment


                        #12
                        great write up!

                        Comment


                          #13
                          No Haltech, no care.


                          So keen to actually do something with my project.

                          Comment


                            #14
                            Needs more Ethrottle.
                            David Fraser - Automotive Historian!

                            Originally posted by bigmuz
                            You can't polish a turd but you can put 600hp in it and laugh your fucking arse off coming past someone sideways at Powercruise.

                            Comment


                              #15
                              Originally posted by I'm DJ! View Post
                              Cheers, mate, the way you sorted shit out on mine was awesome. Great to see in this level of detail.
                              JZ are my bread and butter lately it seems :D How is yours going?

                              Originally posted by The Pupat View Post
                              2 789's, bastard..... I want one of those, struggling to justify it though.

                              Nice setup and rather informative.
                              One for simulation and one for verification :D

                              Originally posted by tim510 View Post
                              I popped in during this install. I can confirm dr who and Star Trek were playing on the tv whilst Jason watched the owner work
                              It hasn't been the same without David Tennant

                              Originally posted by rolin7 View Post
                              Very cool, and relevant to my current interest!
                              Shutup and update build thread :D

                              Originally posted by myliberty View Post
                              Start a blog. Nekminnet: #tunedbybuthurts
                              Nekbeardminnet. I could get some stickers made.

                              Originally posted by cracka View Post
                              Should really get you to spend a few hours fine tuning ute on street with me for super economy. Love it
                              Bring it around already.

                              Originally posted by Slides View Post
                              No Haltech, no care.

                              So keen to actually do something with my project.
                              Monday coming is a haltech FJ20 DR30 FWIW :D

                              Originally posted by JZK25 View Post
                              Needs more Ethrottle.
                              If it were up to me :D
                              Jason Broadhurst

                              Someone once asked me if they could use my mower. I said "sure, so long as it doesn't leave my yard"

                              Comment

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