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Thread: new $EE tuning thing!

  1. #1051
    Fuel Injected! steveo's Avatar
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    you could do a scroll area and resizable window, i did not build eehack's ui like this because i started working on it before i knew how QT uis are supposed to work.

  2. #1052
    Fuel Injected! Terminal_Crazy's Avatar
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    Quote Originally Posted by Terminal_Crazy View Post
    Evening.
    Just a little bit of feedback.
    Iíve not had a proper chance to test it yet and wonít for a couple of weeks.
    I opened the control window earlier and itís taller than my laptop screen (1200x1024).
    The bottom row of adjusters was not showing. (First five rows were visible).

    Perhaps it could be split into several smaller windows.

    Iíll give it some hammer as soon as I can.
    Cheers
    Mitch
    Checked my laptop today and Itís screen is only 1024x800.
    The window wonít go full size (double clicking the title bar) and wouldnít open over the icon bar across the bottom of the screen.
    I didnít think at he time to move/hide the icon bar.
    Iíll try that tomorrow.


    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  3. #1053
    Electronic Ignition!
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    I'm a real SD guy, hate that MAF stuff so happy to see realtime VE!
    But is it possible to do it more Tunerpro way ? I mean full table with cell tracing and realtime adjusting on cell ?
    Currant way is hard to hit current cell and keep being focused on driving too.
    also do i get it right that after each work i need to dowbload bin, save and upload it again to keep changes for more than on ignition cycle ?

    best regards

  4. #1054
    Fuel Injected! Terminal_Crazy's Avatar
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    @Kur4o

    I reflashed and logged this morning but I keep getting a DTC 99 showing - Tach output circuit
    I've switched it off in TunerPro but it still shows in EEHack & won't go away.

    I've had a few other DTC's come and go whilst tuning over the years
    DTC 43 knock sensor
    and iirc a VSS fault.
    Could these be down to the patches in the bin? as I've never found faults when checking them and they disappear again.


    I've played with the O2 adjusters today but can't hear or see much changes from full on to full off.

    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  5. #1055
    Fuel Injected! Terminal_Crazy's Avatar
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    Anyone had any success playing with the new O2 Tools?

    I've messed around a little but can't make any subjective opinions on any changes I've made.
    It seems to very hard to tell much difference when altering settings.



    TIA
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  6. #1056
    Fuel Injected!
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    Make sure you burn the bin with the latest .exe and there is a check box on right up side of the 02 controls window, that needs to be checked.
    I remeber I did a quick beta test and all of the 02 trims worked as expected. Doubled checked with direct memory dump, so they changed the values when commanded. These settings are slow acting and will take some time to see the input. When you uncheck the enable box the last settings will be in effect untill you zero them with the boxed checked, or turn the ignition off.

    I never experienced any dtc, only a brick situation with a single bit off error.
    There is a possible condition that will have random dtc set for a split second, but that`s not your case.

  7. #1057
    Fuel Injected! Terminal_Crazy's Avatar
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    Hi

    Been reading up on the EOIT settings

    Can you clarify the TDC position... I'm guessing 0 timing is TDC at compression ?

    This is the Stock 1995 Z28 table.

    DegC Deg Hex TDC+
    spk btdc
    0 0 0 TDC
    -40 2 20 180 180 bottom of power stroke ?
    -28 2 20 180 180
    -16 2 20 180 180
    - 4 2 20 180 180
    8 4 40 360 0 TDC exhaust
    20 4 40 360 0
    32 4 40 360 0
    44 4 40 360 0
    56 5 50 450 90 90Ý down on intake stroke ?
    68 5 50 450 90
    80 6 60 540 180 BDC (Bottom of intake stroke?
    92 6 60 540 180
    104 6 60 540 180
    116 6 60 540 180
    128 6 60 540 180
    140 6 60 540 180
    152 6 60 540 180


    Each 90Ý is covered by 16 points so 5.625Ý == 1Hex value
    My cam is about 56 degrees overlap guestimating 34+ degrees bigger than stock
    6 x 5.625 = 33.75
    7 x 5.625 = 39.375
    so try adding 6 ... should have it at 573.75

    So fired it up let it idle for a while to warm up
    then played with EEhack eoit settings
    The table opens with a value of 270 which i guess is a 3 (30H) on the table.

    Moving the slider affected the fueling until CL settled down again so it is working.

    Initially I moved the slider a few points at a time without major improvement
    dropping the slider down to 96 seemed to give the smoothest fueling
    So I stepped 90 degrees at a time and reset BLM's each time until it settled...

    BLM's were
    96 110 120 & 113 121
    186 121 123
    276 105 128
    366 108 128
    456 108 128
    546 108 128
    636 108 128
    714 113 131 & 108 134

    With Control off (back to 66H)
    Resetting BLM's several times settled on
    118 121
    120 121
    123 124

    engine temp down to about 86C but smoking & spitting water - crap throttle, response boggy and hesitant.

    I've not driven the car yet, it's too cold wet and dark.
    I'll see if i get 5 mins tomorrow.

    Anyone else played with these settings yet?


    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  8. #1058
    Fuel Injected! Terminal_Crazy's Avatar
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    @ kur4o:

    Hi, Can you clarify some EOIT numbers please.

    EOIT is degrees ( Reference periods and fractions of 90 degrees) ATDC on compression.

    Stock LT1 has 6 in the table so would be at 540 degrees which would be at bottom of the intake stroke.
    IF B&Y cars are 270 degrees that would be 7 in the table?

    You say the table's highest figure is 6F which is 7 reference periods.

    On EEHack the Overide table will adjust from 96 degrees to 714 degrees.
    Does this mean the table starts at 90 degrees or your slider values are off ? 7x90 = 630 max ?

    Does this table have an offset similar to the HPTuners thread where it's referenced from -784 ( 2 revs, 720 and -64 degree offset) ?

    I've just realized that it could be the XDF I'm using to view it that's incorrect but all versions I have seem to have the same parameters.


    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  9. #1059
    Fuel Injected!
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    This graphic should explain it all.

    The red line is the injector firing.
    You can see the open event vary based on the commanded pulse lenght but the close event will be at the exact value specified at the table.
    If you want to fine tune, you should factor the time the fuel needs to evaporate also.

    The built in limit of 6f is a software limiation, the PCM might freak out if you go over it.

    You can chart your cam specs in the chart and see where is the overlap and make a tuning startegy from there.

    I charted the gm846 cam here.

    Green -yellow is the overlap at 0.05 lift. 4 degrees in total
    Blue -red is the total overlap.

    I am still looking for complete specs of stock gm b-body cam.
    It will be very good source how gm tuned it. As you can see the compression in the cylinder already.
    Attached Images Attached Images

  10. #1060
    Fuel Injected! Terminal_Crazy's Avatar
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    Sorry, I'm having difficulty matching the values.

    I was really after clarity on the numbers as they dont match with EEHack's control panel.
    The control slider adjusts from 714 to 96. Should it not start from ZERO?

    It states degrees ATDC of the cylinder fire event so I presume it counts in hex in 16ths of 90 degrees starting at zero?
    1995 LT1 Z28 has 6 or (Hex60) in the table when hot. That would be 540 degrees, ( 360+_180_ or 6*90).

    What does the B & Y body have in the table to get 270 ? I see it would need to be a 7 (6F MAX) ( 360+270 or 7*90 = 630)

    What is the degree value of each value in the bin?
    and can you confirm it starts at ZERO?


    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  11. #1061
    Fuel Injected!
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    720 - [value] * 5.625

    value = table value converted in decimal.

    That is the formula to convert the table value to degrees.
    You start at $01[ pcm will not like zero] and go to $6f max value.

    At ideal conditions $00 should be 720 degrees and $80 sholud be zero degrees.
    0-720 = $80-$00.

    At some point the counter should reset and start again at $80.
    That`s could be the reason to not go beyond 6f. The PCM might freak out.

  12. #1062
    Fuel Injected! Terminal_Crazy's Avatar
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    Aha, (720-) that’s the bit I wasn’t seeing.

    Excellent, thankyou. I’ll have another play now I can see the numbers.

    Thanks
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

  13. #1063
    Fuel Injected! spfautsch's Avatar
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    I've been watching the discussion casually and recognized the value of tuning the EOIT parameter(s) a while back, but simply lacked the time to research. Since I'm sitting at home tonight anxiously awaiting a call from a machinist with news on my block getting bored and decked, and preparing mentally to replace the timing belt for the 4th time on my 460k mile diesel daily driver tomorrow morning (16 hours of relative boredom culminating in my hands smelling like diesel soot for 3 days), I thought I'd finally try to catch up.

    To summarize in one sentence, this is a fascinating topic and deserves it's own discussion thread. I have plenty of other projects to tend to at the moment, but if no-one else wants to I will try to find time to "fork" this to it's own.

    The scope capture vilefly grabbed for kur4o is very compelling. The last time I looked at it with any interest I was knee-deep in the diy-ltcc concept phase and only concerned myself with the optispark signals. But today I looked at it with the EOIT topic fresh in my mind and it strikes me as absolutely crucial information to anyone running a nasty (large overlap) cam and larger injectors. In the capture specimen the entire injection pulse is happening during the middle of the exhaust stroke right before the intake valve opens. I presume the strategy GM was employing here was to boil the entire fuel charge on the back of the intake valve before the air charge is drawn in. But for a cam with plenty of overlap I suspect (as has been attested to by numerous other scattered posts on the subject) that delaying EOIT so it happens after peak intake valve lift would do wonders to reduce the amount of raw fuel getting sucked into high performance scavenging exhaust systems and the O2 signal corruption that results.

    Testimonials by Rocko350 here, and by kevinodb1 here lead me to believe this may be the answer to eliminating cam surge and achieving stable closed loop idle. Thoughts?

  14. #1064
    Fuel Injected! Terminal_Crazy's Avatar
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    Quote Originally Posted by spfautsch View Post
    .

    Testimonials by Rocko350 here, and by kevinodb1 here lead me to believe this may be the answer to eliminating cam surge and achieving stable closed loop idle. Thoughts?
    Yes. Start a new thread please. This is just a 2 minute reply.
    I’d add a me too to the above comments although my findings are stranger than i was expecting.
    I’ll post up my findings in the new thread.
    Mitch
    '95 Z28 M6 -Just the odd mod.
    '80 350 A3 C3 Corvette - recent addition.

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