Tuneboy for 990?

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by cyborg, Apr 5, 2008.

  1. OldSchoolMike

    OldSchoolMike Been here awhile

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    Mike-

    I'm no tuning guru but I put the FMF's on last week. With the stock map everything works nicely. I haven't had a chance to check fuel mileage yet but a couple of short rides make me think there won't be any significant change.

    But the weight change and the sound change are huge! :clap

    Hope this helps.

    Mike
    #81
  2. cyborg

    cyborg Potius Sero Quam Numquam

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    NCWMike, 25mpg seems really low even for the 990 unless you spend all your time at WOT :lol3
    As to your options, unless you buy a Tuneboy and try loading new maps, then you should take it to the dealer who hopefully knows how to reload the maps and can use their diagnostic tools -- if they have any -- to determine if anything else is wrong with your fueling system.

    I too installed FMF's when the bike was new, standard map, ran great and freer revving, lot louder, and the same 35mpg.


    For all: Here's the flow chart from the Euro Keihin Patent Krust posted, something for us to ponder.

    [​IMG]

    I wonder if "open loop mode" bypassing all the normal processing is what our bikes default to (poor mileage-rich map?) if we have crappy lamda sensors??

    More research is in order

    http://www.lambdasensor.com/

    "I know nothing!" Sgt. Schultz on Hogan's Heroes
    #82
  3. Krust

    Krust Adventurer

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    Per the graph in the flowchart it should only make the open or closed loop decision based on the Throttle Position and the RPM. The only way I could imagine that it would do otherwise is if it actually thought that one of the O2 sensors was bad, but then you should be getting an FI system light/blinking code.

    I wonder if the O2 sensors are narrowband or wideband. If narrowband I can definitely see why there would be huge inconsistencies if the any of the maps are trying to run closed loop at anything other than 14.7:1. Narrowband sensors are so variable at anything other than stoichiometric A/F ratios that it would be nearly impossible for the system to get the fueling correct.

    Have you guys figured out what the variable in the Tuneboy fueling maps actually is? It obviously isn't A/F ratio.

    P.S. Anyone have an extra ECU laying around that they would be willing to sell?
    #83
  4. cyborg

    cyborg Potius Sero Quam Numquam

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    Thanks for the feedback Krust

    Maybe asking Wayne of Tuneboy what the cells in the map actually mean might shed some light.

    What would be cool if someone could identify brand/part# what O2 sensors we are currently running on the 990's and maybe cross them to a higher quality part, or at least get their sensor profile and maybe find a close match in a wideband if it's a narrow band if that's even possible? Tahoeacr has much more experience in this on the automotive side and it sounds liek you do too. :thumb

    Extra ECU's? Hmm, there are so few of these 990's around to begin with...
    #84
  5. Scrotie

    Scrotie Chuck U Farley

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    #85
  6. tahoeacr

    tahoeacr Long timer

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    Got my code today. Now to get to work. The #'s in the fuel table are in milligrams of air. Bigger # ecu thinks more air so it suplies more fuel.
    #86
  7. Krust

    Krust Adventurer

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    There has to be another table somewhere either with fuel injection on times, or A/F ratios. Otherwise the ECU wouldn't know how much fuel to add for the air in the table. Also, I think those numbers are way too low to be mg of air. Unless it's calculating every 1/10 of a second. My car makes around 310-315hp and the Mass Air Flow usually reads around 280 grams/sec peak.
    #87
  8. azkiwi

    azkiwi message in a bottle

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    Something is badly wrong. It should be 20mpg higher. My 07 with 3K got mid-40's to 50.
    #88
  9. tahoeacr

    tahoeacr Long timer

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    That's what it says. I see your point as 9k is roughly set at 19 grams.

    Sample at 9k is what 105 times a minute. Top of my head, I don't have a calculator handy.


    The Keihin has ​
    [FONT=Arial,Italic]F1,F2,F3
    for individual cylinders, the Sagem has [FONT=Arial,Italic]Fuel Map [/FONT]for all cylinders.
    To view the other tables click on the tab with the name of the table you want to view (for
    example clicking on the “Ignition” tab will switch to the Ignition table.)
    The Fuel table is made up of 16 ,24 or 32 RPM increments (dependant on tune) and 16 or
    20 throttle position increments (TPS).
    The Ignition table is made up of 16 or 32 RPM increments and 16 or 20 throttle position
    increments (TPS).
    The Ignition table is in degrees before-top-dead-centre. This table is indexed by calculated
    engine load and revs per minute.
    The Keihin ECU uses several Ignition tables, these are I1, I2, I3 and I4.
    The fuel table is in milligrams of air. This table is indexed by throttle position and revs per
    minute.
    The bottom rows of the tables on some tunes are not used as they are outside the range of
    the
    [FONT=Arial,Italic]throttle position sensor [/FONT](as indicated by “N/A”.)
    The numbers in the fuel table equate to the amount of air the ECU thinks that a cylinder
    takes in during one
    [FONT=Arial,Italic]engine cycle[/FONT]. A bigger number will make the ECU deliver more fuel and

    a smaller number less fuel. This is because it thinks the cylinder has more air in it.

    The cool a/f tables are only available with the sagem fi. There is info on them but they aren't available.

    The A/F 1 table is used to calculate the ratio of fuel to be added to the air in the cylinder.
    This has nothing to do with oxygen sensors in the exhaust and applies even if your motor
    does not have a sensor. The way the A/F 1 table works is simple. If the ECU calculates from
    the fuel table that the motor has 300.0 milligrams of air and the target air/fuel ratio is 13/1,
    then the ECU needs to add 23 milligrams of fuel. The actual injector pulse time is calculated
    using the known value of the injector flow rate. This can be changed in some of the tunes
    under the tune constants menu item. The A/F 1 table is indexed by calculated engine load​
    and revs per minute.

    So far I've started the bike with a tuneboy map. I do like the real time readings as I can see where it is(the map highlights current load/rpm). On a dyno I will be able to read fuel/ ignition timing with a given load. Time to instal a knock sensor. I just got to take the pcIII off so I can go ride and check a/f ratios. I've got the same map loaded in the ecm and the pcIII. Might be a bit rich:rofl .
    [/FONT]
    #89
  10. cyborg

    cyborg Potius Sero Quam Numquam

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    GO TAHOEACR!!! :thumb
    #90
  11. Krust

    Krust Adventurer

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    Awesome! Look forward to seeing the results.

    It would be really interesting to see the A/F graphs from the Innovate for the base file compared with the A/F graphs from your modified file to see exactly how much the changes impact the A/F ratio.
    #91
  12. Michhub

    Michhub Major Medical

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    Any more updates...???
    #92
  13. cyborg

    cyborg Potius Sero Quam Numquam

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    Haven't heard from Tahoeacr in awhile, he may be busy with that pesky "work" thing....
    #93
  14. tahoeacr

    tahoeacr Long timer

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    Yes, that work thing has been running my tail off. I did get home for a week. Rode 330 miles yesterday with a buddy LEO. Our pace was much faster than I would run. Anyways, I put the speedo back to 21ws and was running 16/42 gearing. The last tank was 49 mpg running 75-80 for 100+miles and canyons the rest. 203miles before the fuel light went on. The first tank went 143 before the fuel light. That was with the Akra map and some sx riding off-road. Good thing is the Tuneboy kept the a/f right all the way up to 9K elevation. I'm going to spend the rest of the week-end fine tuning the map. I did see some flat spots. There's a dead spot about 2200 rpm rolling out of corners that needs more fuel. Monday I'll be riding it down to Willow Springs Raceway for work. 350 mile test.
    After I get this perfected it will be a road trip to Seattle to get your bike set.
    #94
  15. cyborg

    cyborg Potius Sero Quam Numquam

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    Rockin' dude! I want that mileage!!!! :clap :clap
    #95
  16. hilslamer

    hilslamer 2XRedheadedstepchild

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    +1 :evil
    #96
  17. 1911fan

    1911fan Master of the Obvious

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    With a stop in Wenatchee to do mine? I'm gettnig about 35-40 on my stock 990.

    NCW Mike
    #97
  18. K2m

    K2m ....58....

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    A quick check of the wiring schematic confirms they are narrowband.

    http://wbo2.com/lsu/lsuworks.htm
    #98
  19. cyborg

    cyborg Potius Sero Quam Numquam

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    :lurk
    #99
  20. tahoeacr

    tahoeacr Long timer

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