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  • speedometer calibration??

    anyone know how to calibrate the sppedomter to compensate for larger tires using our carputer and the obd II connection? I donjt feel like spending $500 for a programmer.
    2.4 celeron
    150 watt OPUS
    micro atx
    xp pro
    tv/radio tuner card
    audigy
    Dual monitor Radeon
    802.11G Mimo
    xm pcr
    dvd
    gps
    8" Lilliput touch screen
    IGuidance
    dual optimas
    battery isolator
    15" screen
    My Truck

  • #2
    its vehicle specific I dont think its part of the obd2 spec (could be wrong there i havent checked), but you could talk to the dealer--I've heard of it being done for about 50$
    Otherwise you have the hypertech for 360$ OR LS1 edit (depending on your engine) for less than 500$
    LS1 edit will give you a lot of control over your ecu--i would suggest checking it out.

    Comment


    • #3
      Yeah- It's an LS1. But I like the Diablo Sport if I'm gonna spend that much money.
      2.4 celeron
      150 watt OPUS
      micro atx
      xp pro
      tv/radio tuner card
      audigy
      Dual monitor Radeon
      802.11G Mimo
      xm pcr
      dvd
      gps
      8" Lilliput touch screen
      IGuidance
      dual optimas
      battery isolator
      15" screen
      My Truck

      Comment


      • #4
        Speedo changes are done with what's called the pinion factor and it is proprietary to each OEM and not covered under OBDII regulation. So your gonna need access to a good scan tool like www.obd2.com

        Comment


        • #5
          I have work on mitsubishi /chysler and on certin cars pinon factor can be set with the DRB3 , but only to the tire sizes set at the time of manufacture.
          i do not know about other car lines as they may have something the same.
          but i dont think that any scaner will do this, as the name implies they scan but do not reflash. to reflash a engine control unit needs a programer. programers are done by the manufacter , and to reflash without epa approval is a emmision violation. no maker of a "scaner" want that kind of heat from the epa, without a "off road use only" waiver.

          Comment


          • #6
            There are some piggyback controllers for doing speedo calibration.
            PowerVoice v1 | NaviVoice Source
            GammaControl v2.4
            SKINbedder v3

            1995 Lexus SC300

            Comment


            • #7
              Originally posted by lawrence
              I have work on mitsubishi /chysler and on certin cars pinon factor can be set with the DRB3 , but only to the tire sizes set at the time of manufacture.
              i do not know about other car lines as they may have something the same.
              but i dont think that any scaner will do this, as the name implies they scan but do not reflash. to reflash a engine control unit needs a programer. programers are done by the manufacter , and to reflash without epa approval is a emmision violation. no maker of a "scaner" want that kind of heat from the epa, without a "off road use only" waiver.
              My Hypertech and quite a few others can. Look on the net and theres umpteen "power" programmers out there that tell your fuel injectors to basically go wide open every time you hit the gas that the EPA hasnt stomped on. Changing tire size is not at OBD2 emissions issue

              Comment


              • #8
                Yeah, I know about all the programmers but I want to see if I can cheap out and do it on my pc. But I guess Im gonna have to break down and buy the Diablo Sport Predator Programmer. Oh well, $400 for an extra 40 hp isnt bad.
                2.4 celeron
                150 watt OPUS
                micro atx
                xp pro
                tv/radio tuner card
                audigy
                Dual monitor Radeon
                802.11G Mimo
                xm pcr
                dvd
                gps
                8" Lilliput touch screen
                IGuidance
                dual optimas
                battery isolator
                15" screen
                My Truck

                Comment


                • #9
                  http://www.blackrobotics.com/yb_home.htm
                  PowerVoice v1 | NaviVoice Source
                  GammaControl v2.4
                  SKINbedder v3

                  1995 Lexus SC300

                  Comment


                  • #10
                    Thanks, thats cool. But I need more than 28%. I had 30" tires. Now I have 40" tires. But I guess after I gear it, then it would work. But I'm not sure if I wanna spend $1000 to gear the rear end at this point.
                    2.4 celeron
                    150 watt OPUS
                    micro atx
                    xp pro
                    tv/radio tuner card
                    audigy
                    Dual monitor Radeon
                    802.11G Mimo
                    xm pcr
                    dvd
                    gps
                    8" Lilliput touch screen
                    IGuidance
                    dual optimas
                    battery isolator
                    15" screen
                    My Truck

                    Comment


                    • #11
                      Originally posted by n8scstm
                      Thanks, thats cool. But I need more than 28%. I had 30" tires. Now I have 40" tires. But I guess after I gear it, then it would work. But I'm not sure if I wanna spend $1000 to gear the rear end at this point.
                      Use two of those
                      PowerVoice v1 | NaviVoice Source
                      GammaControl v2.4
                      SKINbedder v3

                      1995 Lexus SC300

                      Comment


                      • #12
                        LOL. If that even works I really can't justify spending $200 when I could get the programmer for $400. Come one guys, I was trying to be cheap. Guess I chose the wrong hobby.
                        2.4 celeron
                        150 watt OPUS
                        micro atx
                        xp pro
                        tv/radio tuner card
                        audigy
                        Dual monitor Radeon
                        802.11G Mimo
                        xm pcr
                        dvd
                        gps
                        8" Lilliput touch screen
                        IGuidance
                        dual optimas
                        battery isolator
                        15" screen
                        My Truck

                        Comment


                        • #13
                          Originally posted by n8scstm
                          LOL. If that even works I really can't justify spending $200 when I could get the programmer for $400. Come one guys, I was trying to be cheap. Guess I chose the wrong hobby.
                          http://www.autotransinc.com/Recal.htm
                          http://www.drivetrain.com/autotransc...alibrator.html
                          PowerVoice v1 | NaviVoice Source
                          GammaControl v2.4
                          SKINbedder v3

                          1995 Lexus SC300

                          Comment


                          • #14
                            Originally posted by lawrence
                            I have work on mitsubishi /chysler and on certin cars pinon factor can be set with the DRB3 , but only to the tire sizes set at the time of manufacture.
                            i do not know about other car lines as they may have something the same.
                            but i dont think that any scaner will do this, as the name implies they scan but do not reflash. to reflash a engine control unit needs a programer. programers are done by the manufacter , and to reflash without epa approval is a emmision violation. no maker of a "scaner" want that kind of heat from the epa, without a "off road use only" waiver.
                            The DRBIII software does some calculation based on tire sizes that were preconfigured so that the proper pinion factor is implemented with the most common tire configurations. The vehicle needs a mathematical figure to correctly display speed based on calculated speed. The DRBIII software does this calculation for the user to speed up routine service processes.

                            Changing the pinion factor does not require a reflash of the ECU. It is a setting that gets updated on the ECU's current firmware. The firmware is certified by the OEM to comply with the EPA regulations. The issue of a scan tool provider supporting pinion factor is one of work and not regulation. Each OEM does it differently (on each vehicle line) so the effort of those permutations is significant. And the availability of vehicles to validate that it works is another level of effort and cost.

                            Comment


                            • #15
                              Originally posted by n8scstm
                              LOL. If that even works I really can't justify spending $200 when I could get the programmer for $400. Come one guys, I was trying to be cheap. Guess I chose the wrong hobby.
                              Use this. Use Photoshop to adjust the location of the markings. Print out on photo paper. Drymount to your speedo. Done
                              Attached Files
                              Originally posted by ghettocruzer
                              I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
                              Want to:
                              -Find out about the new iBug iPad install?
                              -Find out about carPC's in just 5 minutes? View the Car PC 101 video

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