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Thread: XDF Progress

  1. #851
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    Click here to enlarge Originally Posted by shushikiary Click here to enlarge
    I have my cold start set to 1 second, AFR's are trying to stay at 14.7:1 (lamba as expressed for gas not E85) during this rough idle, I have to pump the pedal to keep it from stalling out. I have my idle set at 980 rpm. IAT was at 28deg F. Load and STFT I'm not sure.
    Are you making the whole RPM range uniform? Or keeping the stock taper?

    Heres mine.

    Click here to enlarge
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    Click here to enlarge Originally Posted by all4bspinnin Click here to enlarge
    Can we have a hint?!?!! Click here to enlarge
    Hint: Jake is a genius, oh and it works beautifully too.
    Formerly 3000GT MR

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    I kept the stock taper

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    Click here to enlarge Originally Posted by shushikiary Click here to enlarge
    I think I just found a typo in the latest XDF

    The bank 1 and bank 2 fuel scalar tables go from 6000 to 3250 to 6500 in the RPM Y axis, just fixed it on mine, but might double check the public repository.
    Those numbers are obtained from your BIN file, not from the XDF itself.

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    Ok, that's good then, and glad I found the typo in my bin.

    I guess that means the xdf is only addresses of the values, sizes of the types (to express the arrays in linear memory and byte wise address), min/max for said table values and their supported accuracy. I should look into that, I doubt they are all floating point. I've never really looked at what's in the xdf its self, I suppose I should.

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    Click here to enlarge Originally Posted by shushikiary Click here to enlarge
    Ok, that's good then, and glad I found the typo in my bin.

    I guess that means the xdf is only addresses of the values, sizes of the types (to express the arrays in linear memory and byte wise address), min/max for said table values and their supported accuracy. I should look into that, I doubt they are all floating point. I've never really looked at what's in the xdf its self, I suppose I should.
    Yep. Floating point is pretty common and usually automatically generated by the value in the hex, but if you really want to double check the defined stuff go right ahead, guarantee there's errors. Can they be found without an a2l, damos etc is another story, but you're on the right track.

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    Click here to enlarge Originally Posted by Chris@CKI Click here to enlarge
    Are you making the whole RPM range uniform? Or keeping the stock taper?

    Heres mine.

    Click here to enlarge
    So it works great until it doesn't. It's worked great at 15F, and died at 30F. Below -2F, if it fails, you're pretty $#@!ed though with high ethanol content. Still great advances, down to only needing a few more tables. My taper is similar.

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    Click here to enlarge Originally Posted by shushikiary Click here to enlarge
    I kept the stock taper
    Add 50% to the 100rpm columns then copy and paste those to the other RPM points up to 1400 to eliminate the taper. Mine doesnt hesitate a bit down to around mid 20's which is the coldest i've been able to tested it to.

    Click here to enlarge Originally Posted by V8Bait Click here to enlarge
    So it works great until it doesn't. It's worked great at 15F, and died at 30F. Below -2F, if it fails, you're pretty $#@!ed though with high ethanol content. Still great advances, down to only needing a few more tables. My taper is similar.
    From a distance it looks like a taper because im comparing it to a stock bin in the background. I removed the taper and set all values from the 100rpm column. You may also have to raise the table limit value. I think mine is set to 500.
    Formerly 3000GT MR

    Have a single turbo and/or tired of burning up O2 sensors? Ask me about the new ADV retro kits!
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    It's not a taper so much as a ramp up as temp decreases, and I set all values. What I'm getting at is it works really well usually, but sometimes randomly the car will start and die, similar to how before this table was exposed how the car just wouldn't start, or would start slow and run poor for a minute or so. When this happens below zero F it's very difficult to start. It's not every time, but it happens. If it's warmer it only takes a second try, but when it stalls out at low temps is when it's more difficult. The car seems to vary or learn some of this, it's interesting albeit annoying.

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    Click here to enlarge Originally Posted by all4bspinnin Click here to enlarge
    Can we have a hint?!?!! Click here to enlarge
    No hints, but I will be making a teaser / intro post later today.

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    Click here to enlarge Originally Posted by jyamona@motiv Click here to enlarge
    No hints, but I will be making a teaser / intro post later today.

    Click here to enlarge
    2010 N54 - DocRace - Motiv - CKI - TCKR - Volk - ER - CSF - Vorsteiner

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    1 out of 1 members liked this post. Yes Reputation No

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    Click here to enlarge Originally Posted by jyamona@motiv Click here to enlarge
    It's up.
    Mine is, too ;-)

    Very excited 'bout this development!

    Neil

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    YESSSSSSSSSSSSS!!!!!!!!

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    Small update here, I have traced the warm up enrichment tables for the short "open loop" period following start. There are a few, but I think I narrowed down one that can be used to cure the issues described above. It is currently being tested. Once confirmed, it will be added to the flex fuel implementation as well Click here to enlarge

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    Click here to enlarge Originally Posted by jyamona@motiv Click here to enlarge
    Small update here, I have traced the warm up enrichment tables for the short "open loop" period following start. There are a few, but I think I narrowed down one that can be used to cure the issues described above. It is currently being tested. Once confirmed, it will be added to the flex fuel implementation as well Click here to enlarge
    Huzzah!

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    Very awesome, Jake, keeping on top of all of these details. These updates will help to maintain our future FlexFuel vehicles as high-performance daily drivers.
    2008 E90 335xi AT 60K MILES
    MHD CUSTOM 93 MAP, N20 TMAP, FUEL-IT TBI & STG 2 LPFP, cPE CHARGE PIPE, HELIX IC, FORGE DV, BMS DCI, BMS T-STAT DELETE, BMS OCC, RB PCV, KW-V1 COILOVERS, APEX ARC-8, 235/265 MICHELIN PSS, ALPINA B3 TCU, SCOOPSClick here to enlarge

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    I don't know wtf you guys are talking about 90% of the time in this thread but don't forget about the auto off request for us end users. Please and thanks Click here to enlarge
    2010 N54 - DocRace - Motiv - CKI - TCKR - Volk - ER - CSF - Vorsteiner

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    repped, Jake Click here to enlarge

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