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    launch control

    got my 78 550e that im bracket racing with. i already have dyna s2000 computer, but i was wondering about doing a launch control/2-step. google isnt my best friend. anyone able to give a few pointers?



    1978 gs550e "drag bike"
    1979 gs550l 1st bike
    1981 gs650gl cruiser
    1981 gs250t "race track pit bike"

    #2
    Will try to help ... am I right in thinking you want to install a two-step ignition system on your drag race bike?

    If so, what are you running currently for your ignition?

    Comment


      #3
      Dyna DLR 400 launch limiter.

      The Dynatek DRL-400-HD is a 2 stage rev limiter used for drag racing applications. Offering 2 independent rev limiters for launch and high side engine over rev protection the DRL-400-HD is a versatile rev limiter. The DRL-400-HD is designed for use with dual or single fire ignitions and is perfectly compatible with the Dyna S and Dyna 2000 ignition systems. It is also compatible with Twincam and Harley M8 ignition systems. It is not compatible with coil on plug systems.
      My stable
      84 GSX1100EFG-10.62 @ 125 mph 64'' W/B.
      85 GS1150-9.72@146mph stock W/B.
      88 GSXR1100-dragbike 9.18@139.92mph/5.68@118mph.
      98 Bandit 1200-9.38@146mph/6.02@121mph.
      90 Suzuki GS 1425cc FBG Pro Stock chassis 5.42@124mph
      06 GSXR750 10.44@135mph
      00 Honda elite 80 pit bike

      Comment


        #4
        all dyna tek is fantastic

        shift minder - shift counter - drl 400. all wire colors match, and work together great.
        SUZUKI , There is no substitute

        Comment


          #5
          Originally posted by trippivot View Post
          all dyna tek is fantastic

          shift minder - shift counter - drl 400. all wire colors match, and work together great.
          sorry forgot to respond, the drl 400 can that be used along with the dyna computer? i have custom spark tables and i can rev to 12,500 rpms. from the listing on dyna web sight it doesnt look like you can set launch control over 6000 rpms?
          1978 gs550e "drag bike"
          1979 gs550l 1st bike
          1981 gs650gl cruiser
          1981 gs250t "race track pit bike"

          Comment


            #6
            high and low setting on the low side -- yes you can adjust above 6K
            SUZUKI , There is no substitute

            Comment


              #7
              Originally posted by Darthjames21 View Post
              sorry forgot to respond, the drl 400 can that be used along with the dyna computer? i have custom spark tables and i can rev to 12,500 rpms. from the listing on dyna web sight it doesnt look like you can set launch control over 6000 rpms?
              I am just wondering why your saying that you can rev to 12,500rpm. More rpm doesn’t mean more HP. And it is your cam timing that determines what rpm you shift at not your ignition.
              Last edited by stetracer; 09-08-2021, 06:59 PM.
              My stable
              84 GSX1100EFG-10.62 @ 125 mph 64'' W/B.
              85 GS1150-9.72@146mph stock W/B.
              88 GSXR1100-dragbike 9.18@139.92mph/5.68@118mph.
              98 Bandit 1200-9.38@146mph/6.02@121mph.
              90 Suzuki GS 1425cc FBG Pro Stock chassis 5.42@124mph
              06 GSXR750 10.44@135mph
              00 Honda elite 80 pit bike

              Comment


                #8
                Originally posted by stetracer View Post
                I am just wondering why your saying that you can rev to 12,500rpm. More rpm doesn’t mean more HP. And it is your cam timing that determines what rpm you shift at not your ignition.
                i under stand more rpm doesnt make more power. my peak hp is at about 9000 peak tq about 7900??? been 10 years since i "built" the motor, it does sound really good above 9500 rpms lol i dont really rev that high just am able to with all the head work, altho the cams are starting to show wear as i think my oil pump is starting to fail..... this weekend might be the day the motor goes boom. only reading 4psi at idle and only 13 ish at 9000 rpms. pretty sure it should have more. altho google isnt any help to know specs.
                1978 gs550e "drag bike"
                1979 gs550l 1st bike
                1981 gs650gl cruiser
                1981 gs250t "race track pit bike"

                Comment


                  #9
                  Originally posted by Darthjames21 View Post
                  ... only reading 4psi at idle and only 13 ish at 9000 rpms. pretty sure it should have more. altho google isnt any help to know specs.
                  Google might not be much help, but Suzuki helps quite a bit. On page 81 of the factory manual:

                  - Install pressure gauge to the gallery plug over the points.
                  - Warm the engine 10 min. at 2000 RPM in summer, 20 minutes in winter
                  - Increase engine speed to 3000 RPM, read the gauge.
                  - Pressure should be above 1.4 PSI, but should also be below 7.1 PSI.

                  Comment


                    #10
                    Originally posted by phydeauxmutt View Post
                    Google might not be much help, but Suzuki helps quite a bit. On page 81 of the factory manual:

                    - Install pressure gauge to the gallery plug over the points.
                    - Warm the engine 10 min. at 2000 RPM in summer, 20 minutes in winter
                    - Increase engine speed to 3000 RPM, read the gauge.
                    - Pressure should be above 1.4 PSI, but should also be below 7.1 PSI.
                    i did find my service manuel this morning. i forgot i had 1 lol
                    1978 gs550e "drag bike"
                    1979 gs550l 1st bike
                    1981 gs650gl cruiser
                    1981 gs250t "race track pit bike"

                    Comment


                      #11
                      Originally posted by patrino View Post
                      Will try to help ... am I right in thinking you want to install a two-step ignition system on your drag race bike?

                      If so, what are you running currently for your ignition?

                      Dyna s 2000 computer for ignition.
                      1978 gs550e "drag bike"
                      1979 gs550l 1st bike
                      1981 gs650gl cruiser
                      1981 gs250t "race track pit bike"

                      Comment

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