Hotrodding the GS

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

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  1. def

    def Ginger th wonder dog

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    I like the terminology Hotrodding when used in this context. If you think hotrodding does not involve improving fuel delivery vs. engine requirements then you had better speak to Vic Edelbrock.

    What these fellas are doing is attempting to take an already acceptable fuel delivery scheme and improve on it. And while their efforts may not ad bundles of power, they may end up with a nicely refined fuel delivery system from which many of us will benefit.

    And no, the GS will not set world speed records, the reason many of you object to the hotrodding terminology, but I believe Hotrodding is exactly what these folks are doing to the BMW boxer engine...it just involves a computer, not loud pipes, wild cams, exotic engine modifications, etc., although, I would like to see a boxer engine modified using this approach.

    But, if you object strongly to the term Hotrodding, what else would you call it?

    How 'bout a poll to define the work outlined herein or to invent a new term for improving boxer engine performance?

    Anyone? I like tekboxing as opposed to kick boxing...

    As for me, if I ever disassemble my boxer engine, I'll blueprint it upon reassembly...and I will call it hotrodding my boxer...Oh, and I'll install the new fueling maps developed by JJ and his colleagues.
  2. def

    def Ginger th wonder dog

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    Very nice.....almost makes me cry....those period Brit bikes were wonderful!

    Who made the RCM?
  3. Disco Dean

    Disco Dean Long timer

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    Frame, swing arm, tank and body parts all fabricated by Ken. Including the beautiful triple clamps.

    Ceriani forks and hubs original aftermarket race kit from the 60's.

    Engine - new english castings machined from blanks by Ken and the cam box was fabricated by him from a blank as well. Piston made by Ken, Carrillo rod

    Gearbox is a TT from New Zealand.

    It all works very very well.
  4. def

    def Ginger th wonder dog

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    Is the engine lower end ball bearings or automotive insert style?

    You have what I would call a very advanced old school race motorcycle. Derek Minter, Dick Mann and Hap Alzina would approve.

    At what track do you compete?
  5. Disco Dean

    Disco Dean Long timer

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    Roller bearing bottom end. And, thanks, I think they would approve. Geoff Monty just passed away (93) but he did get a chance to see pics of the bike in Classic bike.

    We race in AHRMA in the US and VRRA in Canada at Mosport. In the US we race From Grattan in Mich down to Daytona and Barber in Alabama. The pics were taken at Grattan and testing here in Toronto.

    We are looking to figure out ($$$) how to get it to the Manx GP in the Isle of Man this summer.
  6. def

    def Ginger th wonder dog

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    I have not yet attended IOM TT week...I want to go there one day.

    When you are next at Barber MSP, let me know. I live 20 minutes away. I wanna see (and hear) yer Beezer first hand.

    Are there still any Witworth fasteners on the bike (Heh-heh). Boxer guys have no idea what I'm talking about.
  7. Disco Dean

    Disco Dean Long timer

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    All engine fasteners are Witworth... the rest are metric... makes it tough to grab the wrenches at times for me but for Ken it is second nature.

    I'll keep in touch for Barber - the big Vintage Festival is in the fall every year - a must do if you are that close.
  8. ausfahrt

    ausfahrt mach schnell

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    So this would benefit those of us that are not necessarily looking for peak HP gains but would like to get better throttle response across the whole RPM range?
  9. def

    def Ginger th wonder dog

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    Oh boy, this is gonna be good....I can just tell....JJ and Poolside will be boxer heros, maybe even recognized at the Emmys, or the Academy Awards. :bow

    Can't wait for the next installment.........

    :lurk

    Hey fellas, I'll be happy to write your acceptance speech...

    "I would like to thank the academy for this honor.....blah-blah, etc." :wave
    Don't forget JVB if he does the DVD..........:deal
  10. johnjen

    johnjen I've Been Resigned

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    Yes
    and more.

    JJ
  11. Poolside

    Poolside Syndicated

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    <BR><table border="0" cellpadding="5" width="600"><tr><td>Good throttle response IS horsepower. The difference between poor throttle response and good throttle response, is horsepower.</td></tr></table>
    <BR>
  12. Visian

    Visian Look out!

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    To me the throttle response on oil/hex GS bikes is too good at low RPM, almost like a light switch in slow/technical going, which makes the rider have to concentrate very hard on throttle application.

    There is also a real cut-off when rolling off throttle beyond a certain point ( I believe this is a fuel economy/pollution control measure), which if you're not careful can really upset the bike's balance when riding hard/fast in in the twisties.

    The new OHC motor is much better in these respects, so if you guys can come up with something that makes the throttle easier to manage on the older bikes, I am all for it! :thumb

    .
  13. Poolside

    Poolside Syndicated

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    <BR>
    I know what you're talking about. That 'light switch' throttle is caused by poor initial throttle response.

    When the throttle is advanced (Tip-in), there is an initial dead spot where the motor actually makes less horsepower. Then after a bit more throttle, wham! it all comes in at once.


    Oh yes, that's a good one. Another name for that is Overrun Fuel Cutoff, and it does exactly what you said.


    The second device we have in the works fixes both of those issues. The dead spot at throttle Tip-in, and the Overrun Fuel Cutoff


    <BR>
  14. Johnny Dakar

    Johnny Dakar Fuckin' Smartass

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    My heart fills with lust each time I check Control Panel and see that you've posted, Poolside. Can't wait to see what you come up with. Good luck.
  15. johnjen

    johnjen I've Been Resigned

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    He's really good with this shit. He has it down to the point that he sees the math models as dynamic interactions, not just as numbers in a formula. :thumb

    JJ
  16. J_White

    J_White should be working

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    Still eager to hear about what goes on with the stock system at idle,
    cold start and at temp...
  17. mdmaroon

    mdmaroon Mike

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    I am definitely buying one of these contraptions.

    I hate the surging, and I hate the "on-off" throttle response when trying to ride slow. I was considering selling my GS and buying something like a VFR 800 to rid myself of these annoyances.

    If I can eliminate these problems, I'd certainly rather keep my GS. (Although I'm tempted to buy a VFR anyway... My brother had one and those are one sweet bike. Gear driven cams in a V4...OMG...sounds heavenly, and the power delivery is so smooth and predictible. It's like a turbine engine).
  18. Mike Figielski

    Mike Figielski Been here awhile

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    Can you eloborate on how your solutions (devices) will differ from those already available like the Power Commanders and Dobeck Performance (Techlusion) controllers? Very interested in differences and similarities. Thanks,
    Mike
  19. johnjen

    johnjen I've Been Resigned

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    We are writing a series of explanations describing the key areas in the algorithm that are 'deficient' and what our solution will entail.

    The key difference is we are approaching this from a through understanding of the design of EFI hardware and software that is used. Not merely how to spoof them.

    Well really it's Poolside who has all the smarts on this one.
    I'm just the wide eyed eager lab assistant. You know the one who holds the 2 wires and gets the afro hair do after the ZZZAAAAAPPPPPPPPing stops&#8230; :yikes
    Followed closely thereafter by the off-hand, eureka!. It's a success! Now lets work on a different hair style&#8230; :hair:rofl :lol3

    JJ:evil
  20. johnjen

    johnjen I've Been Resigned

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    Yes we are planning to provide solutions to 'improve' those 2 states of running the engine. But they will probably happen at a later date.

    JJ
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