Announcement

Collapse
No announcement yet.

Rev/speed displays....

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Rev/speed displays....

    Hey all
    I had a quick search for this and all i could come up with were some things for the OBD2 system, something that i dont have!

    My idea was simple - take the computer that we have in the boot, and connect it up to the car to monitor (not control, i'm suspicious of anything that can control a car other than my feet and hands) the outputs of the speed, tacho, air temps, etc. The possibilitys of this are endless for people like me that strive to be lazier than i currently am!

    For example - if you usually go for 300 ks before filling up, the computer could easily take care of this for you and tell you when to go and fill up. For drag racing it couldnt be hard at all to get the 0-100s and quarter mile times.

    I'm sure i'm not the only one thats had this idea, has anyone else actually attempted it though?

  • #2
    check out AshsZ, he is a member here... but not around a lot.

    here is his website:
    http://ashleypowers.com

    take a look at the Z-car computer system.

    ~mike
    Single Member of the "1000 Post and No MP3 Car" Club
    PROJECT ON INDEFINATE HOLD... BOUGHT A HOUSE
    2000 Cavalier Z24 [###-------] Only 30% Done ... Still

    Comment


    • #3
      Blitz Power Meter i-D



      Features:
      The Power Meter i-D can time the following:
      0-200m, 0-400, 0-1km
      0-1/8mile, 0-1/4mile, 0-5/8mile
      0-100km/h, 0-200km/h, 0-300km/h
      0-50mph, 0-100mph, 0-200mph

      $240

      Comment


      • #4
        I've seen things about the Blitz and apexi rsm's (even put one into a mate's car) but was really after something with more versitilty...

        and the zcar site is good, but it's a little hard to see how he's done it...

        Comment


        • #5
          Well your going to need a cable that connects your ecu/ecm to your computer then you need software. Thats what Ash's setup is like. try searching the internet,or check bmw modding sites.

          Comment


          • #6
            Ok i knew that i was going to need a cable to link into the ecu and all that, i guess my question was worded a little vaugly

            Does anyone know how cars transmit the info to the dash? Is the speedo/tach/etc a frequency/voltage or something completely different?

            Comment


            • #7
              alright... i assume that every car built as of the last 10-20 years is going to be entirely controlled by the onboard computer. this means that the guages and other equipment is going to be controlled electronicly. so, the engine data (revs, speed, temp, etc) are going to be monitored by electronic sensors, that are fed into the main computer. from there they are most likely transmitted to the gauges... no more cables from the tranny housing to the gauges...etc.

              big assumption here.. so i hope im right.

              ~Mike
              Single Member of the "1000 Post and No MP3 Car" Club
              PROJECT ON INDEFINATE HOLD... BOUGHT A HOUSE
              2000 Cavalier Z24 [###-------] Only 30% Done ... Still

              Comment


              • #8
                i was giving a schematic of sorts or it was some chip info either way it will let you make a digi speedometer witha few parts like a vss from some junkyard car and stuff i will post it to my web area i am working on if anyone's interested


                oh my bad i just peeked at it its the code to load on the chip and links for the application notes to hook up a lcd and stuff

                oh yeah got another nifty schematic someone else made for a turbo timer / vac/boost gauge and temp and oil and a few other nifty tricks it can do
                WINNER!!!!
                run-on sentance comp 2002!!
                :)

                Comment


                • #9
                  Does anyone know how cars transmit the info to the dash? Is the speedo/tach/etc a frequency/voltage or something completely different?
                  I think his question is how does the ecu send data to the gagues in the dash...

                  I believe that it is voltage (unless you have a digital gague, in which case I would assume not).

                  Comment


                  • #10
                    Mike, i dont know about all cars in the last 20 years, but certainly mine does have the electrics into the instrument cluster, no old speedo cables in sight! Thats exactly what i was talking about.

                    And they are all normal needle gauges too, so silverjester you think voltage?

                    And oddcomp i'd love anything that you've got that i could sink my teeth into as far as this is concerned.....

                    Comment


                    • #11
                      That is definately a very broad assumption to make. My last three car's all early 90's have speedo cables.
                      I think anything obd2 onwards will be electronic, anything preceeding that might or might not be all electronic. Now I think of it possibly from odb1.

                      Comment


                      • #12
                        Originally posted by thenominous
                        That is definately a very broad assumption to make. My last three car's all early 90's have speedo cables.
                        I think anything obd2 onwards will be electronic, anything preceeding that might or might not be all electronic. Now I think of it possibly from odb1.
                        true. the mechanical system would be difficult to interface with. especially if you want to maintain the original gauges... not sure what the specifics are of this project... so who am i to say what will or what wont work.

                        the idea of tapping millivolt or milliamp signals to the gauges would present the easiest (in my eyes) situation to generate some sort of computer mointoring or display of the relevant information.

                        ~mike
                        Single Member of the "1000 Post and No MP3 Car" Club
                        PROJECT ON INDEFINATE HOLD... BOUGHT A HOUSE
                        2000 Cavalier Z24 [###-------] Only 30% Done ... Still

                        Comment


                        • #13
                          I'd have to agree - if it was a mechanical interface then i would have let this die a quiet death a long time ago.

                          As for OBD 1 and 2, as obd2 was an american thing that came in 96 there goes any chance for and obd2 adapter (they do exist, dont know where on the web i saw it, try searching here for one if it solves it for your car!) for my 14 year old car. Also, down in Aust i've never seen a car with OBD of any sort - my own car has its own bmw dianostic plug, but i'd like to avoid that one if its possible.

                          As for the sensors, would the speedo be monitored by a frequency change?

                          Comment


                          • #14
                            I had a noisy speedo cable. I disconnected the cable and my check engine light came on. Quick check with the OBD-II scanner on the AutoPC revealed the check engine light was caused by defective vehicle speed sensor. The cruise didnt work and the truck drives like schit. I guess the VSS signal also goes to the trans control module. The speedo cable ran from the transmission to the dash guage. This let me to believe that dash speedo guage does the machinical to electrical conversion. If your vehicle has cruise control, you can get the VSS wire from the cruise module, even if your vehicle has speedo cable like mine. My 97 Taco was the last year with speedo cable and VPW OBD-II standard. 98 changed to electronic speedo and ISO OBD-II. If you still have trouble locating the VSS wire, just contact the local cruise control installation center. Cruise will only work if it knows how fast you're going. Tach should be easy, just goto any ignition coil.
                            NEW complete and updated My project with 100+ pics on 7-4-03
                            If you have a Shuttle FV24 motherboard in perfect working condition for sale, please PM me.

                            Comment


                            • #15
                              Found this somewhere on the board...


                              * Engine Temp - Analogue Input
                              * Engine Bay Temp - Analogue Input
                              * Outside and Intake Temp (After intercooler) - Analogue Input
                              * Water Temp - Analogue Input
                              * Status of three water relayes - Switch
                              * Oil Pressure - Analogue Input
                              * Boost Presure - Analogue Input
                              * Over-Boost Sensore - Switch
                              * Waste gate Status - Switch
                              * Mixture Air/Fuel - Analogue Input
                              * RPMs - Analogue Input/Pulse
                              * Speed - Analogue Input/Pulse
                              * Fuel Level - Analogue Input
                              * Lights - Switch
                              Does anyone know how to get a pulse reading cheaply into a computer? Is there someway to get it into volts?

                              Comment

                              Working...
                              X