Hotrodding the GS

Discussion in 'GS Boxers' started by Poolside, Nov 18, 2010.

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  1. TrainedChimp

    TrainedChimp Consistently wrong

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    I don't have anything to add to this thread but I wanted to post just to express my interest in the work at hand. Very cool. :lurk
    #41
  2. drcool

    drcool R.I.P. Dave

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    I can't wait for the Beta test in the frozen North( or at least the Banana Belt:D ).

    It was about 40f here today and my 1150 always runs better in the cold. Surewould be nice if it felt like that all the time.

    :ear
    drcool
    #42
  3. wgrant

    wgrant Rambler

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    16 year old Motronic 2.2 with 90,000mi. I'd like a complete modern replacement ECU. I know, pie-in-the-sky...back to reality, count me as very interested. Thanks for your efforts!

    Wayne
    #43
  4. Poolside

    Poolside Syndicated

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    <BR>
    You bet. Not so pie-in-the-sky as you might think. You can get virtually the whole way there with external mods.

    That 16 year old Motronic was born in the 80's. The version in the 1100/1150 is called a Mono Motronic It was designed for throttle body (single injection point) fuel injection systems. It was re-labeled simply Motronic as the OE product for the BMW boxer motor.

    Because of the 180° opposed cylinder arrangement on the boxer motor, the Mono Motronic ECU can be operated as if it's controlling a single cylinder motor running at twice the RPM.

    The primary problem with the Mono Jetronic is that BMW used it to control 2 injectors with a single injector signal. The method is commonly referred to as batch injection. It is sort of like wasted spark ignition, only for fuel.

    That's ok for spark control, but it leaves a lot to be desired from a fuel control point of view.

    <BR>
    #44
  5. Poolside

    Poolside Syndicated

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    I know what you mean :D

    As JJ said, there's a few devices, and they work together. The second one picks up where the first one leaves off, etc.

    The first one works on all the boxers. The second one has an 1100/1150 version, and a 1200 version. The 1200 version is part of the CANbus.

    <BR>
    #45
  6. wgrant

    wgrant Rambler

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    I did not know that. It really helps to explain (and the SINGLE throttle cable) some of the undesirable characteristics of the engine.

    I even installed a Rhinewest chip, but probably couldn't pick the Rhinewest chip in a blind test.

    I hope you guys crack the code.:D
    #46
  7. Geoffster

    Geoffster Fool - Born This Way

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    Will there be an OS X version? I have an extra MacBook Pro I can duct tape to my fuel tank. :lol3
    #47
  8. Monroe

    Monroe Been here awhile

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    following with interest, good luck gentlemen

    Steve
    #48
  9. scooteraug02

    scooteraug02 Dog Rancher

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    Poolside so this explains what is wrong with the present system. Can you explain what a perfect or ideal system would do.

    Say you had no limitations what would you build to make a perfect control unit? Would you have more sensors to make more accurate calculations and more accurate fuel delivery in conjunction with timing changes?

    Would it disregard pollution standards and go for performance only?

    Does another mfgr do it better already?

    Does the boxer do the wasted spark method on the ignition? I had a Pontiac V6 that did the wasted spark. I think they said it sparked the coil of the charged (firing) cylinder and the opposing cylinder at the same time and more spark went to the charged cylinder because it had less resistance.

    This is interesting!
    #49
  10. johnjen

    johnjen I've Been Resigned

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    Another 'limitation' is the overall 'resolution' of the early EFI systems. Sensor inputs and processing power were crude by todays standards. So getting the older systems to step up and effectively deal with todays emission standards required 'creative' solutions. Translated into BMW speak they are called 'driveability issues'.

    JJ
    #50
  11. johnjen

    johnjen I've Been Resigned

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    Yes boxers use the wasted spark method. Vintageheads, Airheads, early Oilheads, <s>Hexheads</s>, <S>Buttonheads</s>, all of them.

    And the real interesting stuff is still yet to come.

    JJ
    #51
  12. marchyman

    marchyman DR and GS

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    That's not what Poolside said in this post.

    :confused
    #52
  13. johnjen

    johnjen I've Been Resigned

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    OOpps. My bad.

    The dual channel 1200 EFI shouldn't be on that list.

    JJ
    #53
  14. Anorak

    Anorak Woolf Barnato

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    Konstant Fahr Ruckeln, perhaps?
    #54
  15. hasenwerk

    hasenwerk Long timer

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    Poolside,
    That looks like the MegaSquirt system... way to go! There will be smoothness and power to be found in that system for sure. Way to go for starting down that trail - I look forward to your progress and benefiting from the results!

    To everyone else... if it is the MegaSquirt sytem Poolside is working on, no, Windows isn't going to be running on your bike! It a micro-controller based system and it is little more intelligent than the MonoMotronic system on the 11x50 bikes now - the Windows box would be there for monitoring and fine tuning. The MegaSquirt system is quite the setup!
    #55
  16. Poolside

    Poolside Syndicated

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    <BR>
    Ja. Konstant Fahr Ruckeln ist farfomgroovin.

    <BR>
    #56
  17. Dan Cãta

    Dan Cãta Long timer

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    So... will it replace the motronic or will it run among it?

    When will you release the product? :D
    #57
  18. Poolside

    Poolside Syndicated

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    <BR>
    The 1200 has its own set of problems. The more modern ECU in the 1200 runs an even more aggressive EPA/EC emissions profile. The 2 cylinders on the 1200 are operated as two different motors. Though they're operated separately, they share two things, the crankshaft and the catalyst.

    The ECU on the 1200 uses control algorithms too complex to get into here. I'll just say that it's both worse and better than the 1100/1150.

    <BR>
    #58
  19. Poolside

    Poolside Syndicated

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    Yes, it will run amok.&#8194;I mean, it will operate along with the ECU.

    Info about the release date will be in the next post or two.

    <BR>
    #59
  20. johnjen

    johnjen I've Been Resigned

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    Nah it isn't the MegaSquirt. That's so yesterday. :norton :lol3

    And from what I understand it would take so many custom parts to interface the 2 systems it would almost be easier just to start over.

    Besides we dun got ourselves a reel ottermotive genius work'n on this here project. We don't need no stink'n mega squirt&#8230; :evil

    And remember this is for the backyard mechanic so we have designed it to be easy to install and use. :thumb

    JJ :gerg
    #60
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