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Dynojet PC-5, with Autotune, and full exh. system Tune...

Discussion in 'Parallel Universe' started by ebrabaek, Feb 8, 2013.

  1. roger 04 rt

    roger 04 rt Long timer

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    Thanks for posting your dyno chart. It makes a good discussion item.

    I'm guessing your tuner measured AFR at the tailpipe, or were they able to use your Wideband O2 sensor for the AFR plot?

    When they said they didn't need to plug SAS, did they give any insight it to why they believed that?

    I don't think it is important for the power curve but AFR is really a measurement of how much or little oxygen is in the exhaust. If you don't plug it, there will be more oxygen since that is its purpose. That will certainly affect the AFR reading, maybe even explaining the AFR "bump" around 4500 RPM.

    You mentioned better mid-range is that something you see on the chart or feel when you ride?

    Last question, was your BMSK reset or has the battery been disconnected before tuning? I wondering what state the Adaptation Values were in. This is something that tuners seem to overlook when installing a PCV. I've seen a 10-20% variation in fueling based on their set/reset status.

    RB
  2. Hamish71

    Hamish71 Been here awhile

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    OK, some of this I can answer, some of this I didnt ask.

    1. Used the wideband sensor - i know this because he was having trouble with the auto tune (ended up replacing the can cable) and but could see the 02 sensor was working.
    2. as for plugging SAS, well, we had a conversation before the tune that started with him saying that his first job was to pull everything apart and check it out, to see if he needed to plug it or not. He simply said that some bikes the tune is more stable with, and some without. I stated what I had read here, and he simply said he would have a look. When I got the bike back, he said that the best tune was without it being plugged and thats what state I got it in. I didnt question why.
    3. I didnt ask about the battery, nor do I know if the bmsk has been reset.
    4. midrange is butt dyno....definitely sharper mid range, and sounds crisper.
  3. ebrabaek

    ebrabaek Long timer

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    That substantiate my findings as well. I tried hard to like the sas disconnected....... but after hundreds of miles it became very evident that it should be left alone (stock) is there any way you could ask the tuner if he has any of the tunes data. I would love to see that. The issue on the 800 is that we don't know it enough, but as I felt a very clear difference. ...one cannot argue with success.
  4. roger 04 rt

    roger 04 rt Long timer

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    Thanks for the follow up. From the dozens of richer fueled bikes we've worked on, the most frequent comments we get after adding fuel by richening the mixture are: much better mid-range and smoother engine.
  5. itsatdm

    itsatdm Long timer

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    I know it is Wikipedia and generic, but the early system they are describing with its flap valve and exhaust port injection sure sounds like the one on the BMW F800gs.

    If it is, then most if not all the air injection takes place at idle.
  6. ebrabaek

    ebrabaek Long timer

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    I would sure like to be able to one day get to the bottom of this, as I understand what Roger is saying. On Cali DRZ models it is called PAIR system, and yields better results with it disconnected. There was no comparison on my bike. It ran like crap with it disconnected. That is the part I dont get. My tuner stated that he did not think there would be perhaps miniscule if any gains by disconnecting it. This was after the tune. But why it runs better with it open...... I am stumped.
    Seems like the Ozzy tuner came to the same results.
  7. Hamish71

    Hamish71 Been here awhile

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    Follow up....after a week or so, I can say that my bike runs beautfully. Initially some pop and crackle on over run, but that all seems to have gone away now....and definitely better midrange. There is a definitie surge in acceleration in midrange, when compared with before.

    Me likey!:D
  8. SOP Dirt-Rider

    SOP Dirt-Rider Been here awhile

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    I do wonder if it is at idle/off throttle? I do know that pre plugging if I wanted to avoid the decel cackle all I had to do was slowly roll off throttle as I was coming to a stop.
  9. gbtw

    gbtw Been here awhile

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    Man i had hoped the tune stopped the annoying shutoff problem i was having before, reason i wanted to get it tuned was the following happen 5 times in 1 hour, sometimes on or before roundabouts. :cry

    But it is back This was 3 times in one day
  10. ebrabaek

    ebrabaek Long timer

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    A few Q's..... You might have mentioned this before, but as the thread grows longer......:D:D Only pc-5.... no AT correct...???? Could you post the base map with the corrections.....?????? Exhaust configuration.....????? I get a pop....once in a while around 3000 rpm, but only one, as I suspect it is the SAS enrichment playing tricks. Only happens at 3K, and only one pop. So we just need to look at what you got.
  11. jengel451

    jengel451 1 Cool MotherF#$cker

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    Wild, I just put a Leo exhaust on and have experienced that exact situation in the video 3 times now. Nothing before it.
  12. gbtw

    gbtw Been here awhile

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    Don't have a long enough USB lead and im not getting the bike up the spiral stairs to my room :lol3

    I will see if i can have a go at that soon.

    Now it did happen quite a bit before i had the pc5 installed, so its not fair to think it might be because of pc5. Posted it here because my initial hope was the refueling on the pc5 helped stop this thing from happening.
  13. ebrabaek

    ebrabaek Long timer

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    It is quite normal for bikes to pop on decel. As the mix goes quite lean, the gasses self ignite. Reason you dont hear it with the stock pipe is all the baffles. There will be popping on decel with the LV slip on..... and as will there with other brands.
  14. ebrabaek

    ebrabaek Long timer

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    LOL.... got it. :D:D. The PC-5 for sure is not causing it, on the contrary it should make it a bit better, as fueling is increased, and an overly lean mix is enriched a bit. Reason for the map, is for me to look at what your tuner programmed. Specially if there are any values in the 0% throttle.... It is ok, and bike is fine, but it can be obnoxious to some.:lol3
  15. jengel451

    jengel451 1 Cool MotherF#$cker

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    Popping is perfectly fine. Hell you should've heard my R1 on Decel with a full race tune gurggle pop pop pop flames pop pop

    What is happening is EXACTLY in this vid. http://youtu.be/j7TTIXg0-bE

    one pop, maybe through the intake and it dies. Normally when i'm downshifting and blipping to bring the rev's up, and normally if the RPM's are lower like in the vid, anything higher up is fine since the engine is still spinning too fast to cause this problem.

    I "Think" that the butterflies are opening before the injectors can add fuel. TPS??
  16. gbtw

    gbtw Been here awhile

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    Glad i am not alone, but i feel for you, bike is no fun to own when this happens 5 times an hour.
  17. jengel451

    jengel451 1 Cool MotherF#$cker

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    For clarity.

    No tune, no piggyback, all stock: No issue
    Add ONLY Leo Slip-on: Intake sneeze and dies
  18. ebrabaek

    ebrabaek Long timer

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    Ohhh dear..... forgive my clueless..ehh... ness....:lol3. Yep, just saw your vid, and you have something else going. Is it still under warranty...?? That issue will not be either helped, or mitigated with any after market fuelers. I would look around, as it could be a number of things....tps, perhaps one of them.
  19. jengel451

    jengel451 1 Cool MotherF#$cker

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    That's GBTW's bike in the vid I think. Mine isn't happening nearly as often as 5 times a day.

    Anyone know if there is a TPS reset procedure for this bike? Might be an easy fix.

    I think the Bazzaz tuners have a TPS feed to manipulate some of the fueling as well. Not sure, but that's what my fuzzy memory is coming up with.
  20. dpm

    dpm Been here awhile

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    TPS reset is:

    key-on
    smoothly open and close throttle twice
    start engine