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Deleting the TCI

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  • #1

    Deleting the TCI

    I'm new, very new, so new I haven't even had time to make a proper introduction.
    However I thought I'd start off by asking a question I have scowered the forums and the Google box in search of....

    Is it possible to eliminate the need for the TCI?

    Now the reason I ask is I am completely redoing my bikes electrical system using the motogadget M-unit and a few other upgrades here and there but the one thing I absolutely detest about the bike is the bulky overly complicated TCI system.

    I'll make an intro thread and link that for the project and to say hello. I just kept banging my head today trying to eliminate as much useless 80s engineering as possible.

    Thanks In advance
    1980 SH - 100% custom wired Road warrior with motogadget everything.
    Looks like a scrap heap, runs like a dream.
    Master of the wires.
    Tags: None
  • #2
    All the ignition is handled through the tci. So unless you found some sort of digital or mechanical way to control the ignition the tci has to stay.

    Could it be done? Yes, anything can be with enough time and money. Is it worth the trouble? Probably not.
    Nathan
    KD9ARL

    μολὼν λαβέ

    1978 XS1100E
    K&N Filter
    #45 pilot Jet, #137.5 Main Jet
    OEM Exhaust
    ATK Fork Brace
    LED Dash lights
    Ammeter, Oil Pressure, Oil Temp, and Volt Meters
    Green Monster Coils
    SS Brake Lines
    Vision 550 Auto Tensioner

    In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

    Theodore Roosevelt

    Comment

    • #3
      +1 on what Nate said. The earlier machines, through 1980, COULD be done a little easier, as there was more mechanical in the advance and vacuum. The 81 controls everything through the TCI, so it would be a beast to replace and still have the bike run as it should.
      I would just move the TCI to a location that is out of the way, but still in cool air and out of the rain and mud. Under/behind the battery holder is a thought.
      Welcome to the madness!
      Ray Matteis
      KE6NHG
      XS1100 E '78 (winter project)
      XS1100 SF Bob Jones worked on it!

      Comment

      • #4
        Cool cool. Since I have a spare I'll see what I can manage as far as making them more stable, I'm assuming if it's anything like an ECU it shouldn't be rocket science to figure out how to simplify it to a smaller unit.

        But thanks for the heads up. Guess back to gutting the old harness it is for now....
        1980 SH - 100% custom wired Road warrior with motogadget everything.
        Looks like a scrap heap, runs like a dream.
        Master of the wires.

        Comment

        • #5
          Furthermore, does anyone by chance have a schematic (board level) for the TCI, I can see pin outs are easy to find I just want to see if there is a proper diagram for the circuit flow.

          Going to get with some friends at DIYautotune to see if we can devise a smarter more stable brain for these bikes
          1980 SH - 100% custom wired Road warrior with motogadget everything.
          Looks like a scrap heap, runs like a dream.
          Master of the wires.

          Comment

          • #6
            Welcome to the site!............and wish you luck with the ign. mod..
            81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

            Comment

            • #7
              So I talked to friend who works at DIYautotune and he believes with the proper tuning the "Microsquirt" could potentially do the trick. I'll be doing some research and report back
              1980 SH - 100% custom wired Road warrior with motogadget everything.
              Looks like a scrap heap, runs like a dream.
              Master of the wires.

              Comment

              • #8
                https://www.diyautotune.com/product/...t-module-v2-2/

                Thoughts?



                MicroSquirt Module is a credit card sized engine management board! This board packs all the features of the MicroSquirt except high current ignition drivers into a 3.5″ x 2.4″ PCB, with all components installed. This tiny ECU opens up unprecedented possibilities – there’s never been a standalone this tiny, or this adaptable. Got a racing series that allows any modification if you can fit in the stock ECU case? No problem! Want to make your own expanded I/O circuit board? Go right ahead – this board already has many of the key features you need for engine management, so simply add your own extra circuits and a connector! The possibilities are limited only by your imagination.


                Here’s a rundown of the features this ECU has to offer.

                Inputs:

                IAT and coolant temperature sensors
                Throttle position
                Battery voltage correction
                External MAP sensor
                Crankshaft and camshaft position sensors (Hall, optical, or VR/Magnetic Pickup supported)
                Oxygen sensor (narrow band or wideband w/ external controller)
                2 general purpose analog inputs for baro correction, second oxygen sensor, MAF, or knock sensing
                GM flex fuel sensor input
                Outputs:

                2 channel injector outputs – works for 2 low impedance or 8 high impedance injectors
                2 logic level ignition outputs
                Fuel pump control
                PWM IAC control
                2 general purpose on/off relay outputs (MS2/Extra 2.1.1 allows use as spark outputs for a total of 4 logic level spark outputs)
                Several unconnected processor pin connections for building your own circuits
                1980 SH - 100% custom wired Road warrior with motogadget everything.
                Looks like a scrap heap, runs like a dream.
                Master of the wires.

                Comment

                • #9


                  Anyone have a good quality picture of this?

                  i need one... for science.
                  1980 SH - 100% custom wired Road warrior with motogadget everything.
                  Looks like a scrap heap, runs like a dream.
                  Master of the wires.

                  Comment

                  • #10
                    Welcome to channel XS11. Your reengineering of the bike is interesting and I of course wish you the best of luck. It seems that you have a lot of experience that could be applicable.
                    Skids (Sid Hansen)

                    Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

                    Comment

                    • #11
                      I'm not familiar with the microsquirt, but I did own a XS11 that I picked-up and parted-out, that had a MegaSquirt with a fuel injection syatem from a GSX-R. The guy had an impressive write-up on here. One of my GS bikes has a Dyna S ignition system that replaced the original system. Ignition curves set. Kind of interesting.
                      1979 XS1100F
                      2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

                      Comment

                      • #12
                        Originally posted by TheNeverCat View Post


                        Anyone have a good quality picture of this?

                        i need one... for science.
                        http://www.xs11.com/forum/showthread...=soldering+TCI

                        The terminals shown on your diagram are on the right end of the pictured TCI in the top picture. The bottom picture shows the leads from the spade terminals at the point they are soldered to the board. The chart in your post describes where each lead goes in the bikes wiring.
                        There is a circuit in the TCI that shuts off power to the coils if the engine has not turned over for a few seconds. (The timing is via a capacitor, so the time varies , depending on the condition of the cap). Does the MicroSquirt have that feature?

                        CZ

                        Comment

                        • #13
                          There have been a handful that have went efi with the microsquirt board. I believe they still used the original TCI though, could be wrong.
                          Nathan
                          KD9ARL

                          μολὼν λαβέ

                          1978 XS1100E
                          K&N Filter
                          #45 pilot Jet, #137.5 Main Jet
                          OEM Exhaust
                          ATK Fork Brace
                          LED Dash lights
                          Ammeter, Oil Pressure, Oil Temp, and Volt Meters
                          Green Monster Coils
                          SS Brake Lines
                          Vision 550 Auto Tensioner

                          In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                          Theodore Roosevelt

                          Comment

                          • #14
                            Originally posted by CaptonZap View Post
                            http://www.xs11.com/forum/showthread...=soldering+TCI

                            The terminals shown on your diagram are on the right end of the pictured TCI in the top picture. The bottom picture shows the leads from the spade terminals at the point they are soldered to the board. The chart in your post describes where each lead goes in the bikes wiring.
                            There is a circuit in the TCI that shuts off power to the coils if the engine has not turned over for a few seconds. (The timing is via a capacitor, so the time varies , depending on the condition of the cap). Does the MicroSquirt have that feature?

                            CZ
                            I'm not sure, but I do know it's capable of basically cloning any engine management system.

                            Thanks for the info though
                            1980 SH - 100% custom wired Road warrior with motogadget everything.
                            Looks like a scrap heap, runs like a dream.
                            Master of the wires.

                            Comment

                            • #15
                              Originally posted by TheNeverCat View Post


                              Anyone have a good quality picture of this?

                              i need one... for science.
                              Yup, that's my diagram. i think I have it in .pdf. lemme look
                              Former owner, but I have NO PARTS LEFT!

                              Comment

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