Hotrodding the GS

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

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  1. Ozav8r

    Ozav8r Been here awhile

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    Have to chime in here, as I got my IICE Air fitted to my 2000 1150GS this morning. As I just returned yesterday from 3000 mile trip around California, Nevada and Arizona, I have very recent and comprehensive comparison to draw on. I have to say, that this little doodad has transformed the smoothness and throttle response on the engine in a very positive manner, and any hesitation and slight 'jerkiness', that was present previously, has now completely gone. I have a REMUS system fitted, and had learned to adapt my throttle use to avoid the 'unavoidable' occasional backfire that goes with the exhaust, but now find that despite my best efforts to 'provoke' a backfire, it just isn't there anymore. Quite remarkable, so big thanks Jim, it was definitely worth waiting for:clap:clap
  2. funsummer

    funsummer Been here awhile

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    i sit here in perth waiting..
    and waiting for the order to ship..
    Leo vince full system fitted
    Foam air cleaner fitted
    Quick action throttle cam fitted
    i sit here in perth waiting..
  3. RAL88

    RAL88 Marineboy

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    Ok. So I have fitted a cat eliminating exhaust on my R850r-gs. I have tried all the configurations that I could find of the ccp and in conjuction with the IIce air. All but one results in a lot of afterfire to varying degrees. It seems that the one that works the best is the removal of the ccp completely which I found is suppose to be done for no cat on the 850r.

    Now, from my understanding in this mode the motronic does not use the O2 sensor in the exhaust and uses 1.8%CO2 as the reading for the motronic to use.

    My question is will the IIce Air still be able to adjust the fuel ratio in this configuration since it is measuring the incoming air temp or is this disabled also when the ccp is removed.?

    Thanks in advance.
  4. CanoeMoon

    CanoeMoon CanoeMoon

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    How excellent. I got mine in Aus, fitting was just plug-and-play and the 1100GS is running like an angry kitten.

    Linear power delivery, so very very smooth i can't believe the difference.

    Thanks heaps Poolside and JJ. It works in Skippy land even though we are upside down.

    as they say in the classics... "how do you do that voodoo you do do so well???":clap:freaky:norton
  5. Happy Wanderer

    Happy Wanderer Day Dreaming.. .

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    With the CCP removed the ECU will look for a CO adjustment trimpot (which is missing...) and just default to open loop "limp home mode". This probably makes the bike run better (richer mixture) but will eventually damage the catalytic converter. Plug in a GS9111 and this should reveal a fault code.

    Euro (and some Canadian) models have no CCP, no converter and have a CO pot installed which is set to 1.8% CO measured in the tailpipe at idle RPM.

    The IIce Air won't "adjust" anything. It will fool the ECU by creating a lower temperature reading than actual. This is done by using simple thermistors in series with the existing one in your airbox. The ECU will react to this and richen the fuel mixture.
  6. Racegun

    Racegun Single Track Mind!

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  7. Poolside

    Poolside Syndicated

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    <BR>Hey there folks. Thank you for the ride reports! Throttle response and smoothness are two of the many reasons we developed these IICE add-ons. Hearing that you enjoy the end result is a treat and a pleasure.


    <BR>
  8. Poolside

    Poolside Syndicated

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    That's just silly, HW. By what mechanism is the damage supposed to occur?


    <BR>
  9. Poolside

    Poolside Syndicated

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    Yes. The ECU always uses the air temperature input and barometric pressure to calculate air density. With that information it determines the length of the fuel injector pulse necessary to create the desired fuel/air density ratio.

    Regarding the afterfire (aka backfire) popping from the tailpipe, that issue is primarily a function of the inconsistent Overrun Fuel Cutoff routine in the ECU.

    Moving the throttle around within the range of fully closed to slightly decelerating is what creates the unburned combustible mixture in the exhaust tubing, and causes the backfires. Tailpipe popping can be greatly reduced or eliminated with careful operation of the throttle.

    To describe the 'workaround' throttle operation as simply as possible, the throttle should be either holding the bike at a constant speed, or opened more to cause acceleration. If you want to decelerate at more than a slight rate, close the throttle fully. When you want to accelerate, or hold the new lower speed, open the throttle quickly and directly to where you want it.

    The above takes practice of course. And I don't like the idea of having to adapt to the ECU. But without other electronic measures there's no way around it.

    The reduced air temperature input has some slight effect on backfiring, I don't know that I'd call it significant, but there is an improvement. As you have seen however, some bikes experience more improvement than others. I ascribe the difference more to the rider, which I suppose is a good example of 'Your mileage may vary.' (YMMV)

    Regardless the name, there are better ways around the problem of tailpipe popping, afterfire, or backfire.


    <BR>
  10. kimokk

    kimokk Been here awhile

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    Any update on the April 2nd batch?
  11. Happy Wanderer

    Happy Wanderer Day Dreaming.. .

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    I am not an expert on engine fueling (that's your dept) but from what I have read I believe the correct answer is heat. Overly rich mixtures may cause unspent fuel to enter into the exhaust flow. When this hits the cataclysmic perverter it causes super heating. This can lead to melting of the honeycomb structure and the metals (catalyst) it is made of.
  12. GS Addict

    GS Addict Pepperfool

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    Agreed
  13. rdcyclist

    rdcyclist Long timer

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    It takes much richer mixture than any fueling mod we're talkin' 'bout here to melt a cat. Think rich like two out of six in a car not firing and your wife drives it around town anyway, thinking it would blow itself out. DAMHIK...:bluduh
  14. RAL88

    RAL88 Marineboy

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    Thanks for that great explanation. So what is the ECU doing when I completely remove the ccp and this stops the tailpipe popping?

    Thanks,
  15. macadamia

    macadamia XK Red 27 Technique

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    Just bought 2, one for my 2012 GS/A and one for my 2002 R1100S Boxer Cup Prep...

    I'd really like to receive them before the end of May if possible. I'm traveling to Alaska, leaving the first week of June, on my GS/A.

    I'm even willing to help with the assembly, as I have stated in at least 2 pm messages sent... Let me know...
  16. frogy

    frogy Been here awhile

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    Everytime you post I always get dizzy...no clue why:eek1
  17. Hookapelli

    Hookapelli Meat Popsicle

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    Every time he posts I get wood... not sure why....
  18. Racegun

    Racegun Single Track Mind!

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    every time he posts, i make sure my wife does not pass by:eek1 and i dont know why
  19. Andrew

    Andrew Optimus Primer Super Moderator

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    I'm really a very slow putt-putt type of rider, lucky to get into third gear on most rides. Today was one such day, motoring along in 3rd, in the slow lane up Ashby. When all of a sudden I realized the bus to my left was changing lanes, into my space, man. :eek1

    Looking back, I'm grateful for two things: A quick reaction to gas it right the hell out of there, and the sudden rush of acceleration that the ICEE AIRE gave me. Two :thumb :thumb to Engineering and Marketing.
  20. macadamia

    macadamia XK Red 27 Technique

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    Every time I post something, no one can remember what I ost... I don't know why either...
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