Electronic Cruise Control

Discussion in 'Parallel Universe' started by BuilderBob, Apr 5, 2012.

  1. BuilderBob

    BuilderBob Adventurer

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    Several years ago I installed and Audiovox electronic cruise control unit on the FJR that I had at that time. It worked great. The K1200GT that I just traded for the GS had cruise from the factory. I liked that too.

    The GS has a Wunderlich throttle lock that the previous owner installed, but I prefer a dynamic electronic unit that adjusts for inclines, headwinds, etc.

    I'm looking at a Rostra unit. All electronic, no vacuum supply needed. At about $250, it's a lot cheaper than the MC Cruise unit.

    So my question is, has anyone installed a similar device? Short of that, can anyone tell me where to look for the VSS wire and how many pulses per second it generates?

    I'm taking a trip out west this summer and would love to have the unit installed and operating by then.
    #1
  2. GB

    GB . Administrator

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    I haven't seen anyone install such a unit. The MC Cruise works well but it's $pendy.
    #2
  3. señormoto

    señormoto Supermoto Abuser

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    Sounds awesome! Do you have a link to the model you're referring to? :D
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  4. BuilderBob

    BuilderBob Adventurer

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    Why yes, I do. Here's a link to Rostra's site: http://www.rostra.com/main/rostra-support.html

    I have purchased the universal unit, model #250-1223 with the dash mounted controller (extra).

    There are several on ebay, Amazon has them, and I saw them on Summit Racing's site.

    First one who figures this thing out has to share with the rest! :D
    #4
  5. rdcyclist

    rdcyclist Long timer

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    There are a number of threads about this in the Oilhead Asylum. IIRC, the guys that used the Rostra unit had to use the magnets on the wheel method of getting VSS.

    Search is your friend...
    #5
  6. BuilderBob

    BuilderBob Adventurer

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    I did a search the parallel forum, but not in the oilhead forum. I'll take a look. I'd prefer to use a VSS signal if at all possible. That not being an available option, I'll use magnets.
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  7. Dieselboy

    Dieselboy Journey not Destination

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  8. BuilderBob

    BuilderBob Adventurer

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    Cool! You might be on to something there! :thumb

    I seem to remember that my GT had 3 wires left bundled up under the battery cover. 2 of them were switched power for an accessory (GPS). Always wondered what the third wire was for. Maybe the GS has that wire too.
    #8
  9. afterburn

    afterburn Adventurer

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  10. Dieselboy

    Dieselboy Journey not Destination

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    Wow! First post. From Netherlands. Different site. Not contacted. You have some amazing snooping software at work!

    Do you know If the Vss rate 6 pulses per minute as I saw referenced for the rt-p elsewhere?

    Hope this info crosses over. It would be nice if this works. Thanks
    #10
  11. BuilderBob

    BuilderBob Adventurer

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    Thanks afterburn. I got your email. Thanks for the speedy reply! I'll dig into it a little later. Have to install a 685 kit on the KLR this weekend, but your info has been a great help!
    I contacted him via his web site. Glad that he posted here as well. Hopefully we'll be on on our way to a successful cruise installation soon!
    #11
  12. afterburn

    afterburn Adventurer

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    I have no idea what the pulse rate is. For the power commander all I care about is having usable signal I can calibrate the PCV against.
    #12
  13. Dieselboy

    Dieselboy Journey not Destination

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    Ah....thanks...glad you didn't string me along....(I would have) :D




    Thanks anyway, BuilderBob appears to have the ball under control.
    #13
  14. BuilderBob

    BuilderBob Adventurer

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    Well, the Rostra CC kit arrived today, so I guess that will be my next project. Have to finish buttoning up the KLR first. I'm wrapping up the big-bore install on that pig.
    #14
  15. Indy Unlimited

    Indy Unlimited Long timer

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    Keep good notes and take some pics of the install BuilderBob. :ear
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  16. BuilderBob

    BuilderBob Adventurer

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    Will do.
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  17. hardybaker

    hardybaker Been here awhile

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    Have you started the install yet? I will soon be doing the same Rostra install on my 2012 Vstrom. Many have done this on the older stroms, but the 2012 and completely different throttle bodies. ANY photos or info would be greatly appericated. HB
    #17
  18. BuilderBob

    BuilderBob Adventurer

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    Not yet. I've been gathering information about some of the technical bits of the GS so that I know how to get the proper signal for the speed input. BMW's CANBUS system can be a bit fiddly once you start connecting aftermarket stuff to it.

    I'd think that the Strom wouldn't be too much different than previous years. You're not connecting anything to the throttle body except the throttle actuator cable. The rest should be pretty much the same.

    I'll be posting up once I start the install.
    #18
  19. BuilderBob

    BuilderBob Adventurer

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    Hey All,

    I haven't abandoned this idea. Just haven't had time to devote to it. I am convinced that it can be done, however, and that the GS can supply its own VSS signal to the Rostra unit. No external device needed.

    Today, while installing a mount for my Zumo, I dug around a little under the battery cover, and voila! There it was: The 3-wire plug that will eventually supply the VSS. According to what I've been able to find out, the blue wire carries the VSS signal, but it must be connected to the 12v power supply on the same plug via a 300ohm 1watt resistor in order to supply a signal that the Rostra unit can digest. According to source, the VSS wire then generates approximately 5,000 PPM.

    I have no doubt about the viability of this project. Once I get into it, I'll start a new thread to chronicle the whole process.

    Here's the plug:

    [​IMG]
    #19
  20. Monroe

    Monroe Been here awhile

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    good luck with your project, I'm sure I won't be the only one watching your progress :clap

    Steve
    #20