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Trailing Throttle and Fuel Cut XDF Tables

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Trailing Throttle and Fuel Cut XDF Tables


  • Author CarAbuser
  • Uploaded 11-25-2019, 08:09 AM
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I've defined some extra tables that would be useful for people that want exhaust burbles that don't use MHD, or people like me that use MHD but like having full control over their custom tune.

I'll upload the XDF definitions for:
I8A0S
IJE0S
INA0S

The INA0S XDF is a cleaned up version of my personal XDF that also has the full throttle correction definitions added.

I'm open to any feedback or bug fixes, defining tables between multiple ROMS leaves plenty of room for copy paste errors. I've tested the XDF tables for INA0S since that's what my car run on. Someone with I8A0S tested the burble tables and said everything worked well.

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Version: 1.0



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Version: 1.0



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Version: 1.0

  • studio54's Avatar
    studio54 -
    Hehe ok i understand now why i got burbles (without checking it in options) with flashing the V12 beta of RFP.
  • studio54's Avatar
    studio54 -
    Thank you for this by the way

    Just one quick question, for people who are 6MT (aka does not have "sport" button), it will never be possible to have burbles only when DTC is pressed once or something like that ?
    With my understanding, it's just possible to set them from/to xxxx rpm.
  • CarAbuser's Avatar
    CarAbuser -
    I'm sure it could be done with a change to the logic but that's not an easy task for me. If you have no sport button then by default none of the sport maps will be available for you.

    I'd be surprised if the RFP maps have been updated to include the burble. It's quite easy to do yourself though. I'd be interested on some feedback on how peple are doing with the tables. I've heard that by default most N54 cars won't burble in neutral so that's something I'm going to look into.
  • studio54's Avatar
    studio54 -
    Yes, i even thought it was impossible to do (did not find something related to DTC in the master XDFs but i am a rookie). Too bad, because sometimes i like burbles, and sometimes i like to be "quiet".

    Concerning RFP Maps, you are right, i just opened the V12 .bin and tables are stock values.
    So i guess there is another way to make burbles cause the V12 map (stage 2 oct 93) is doing a lot of aggressives burbles for sure.
  • studio54's Avatar
    studio54 -
    Quote Originally Posted by kylerwinterd View Post
    Hey I was just about to post these haha. I found today that the MHD aggressiveness is just editing Timing (main). No special tables like MHD has claimed before. This is what the timing table looks like on aggressive(Link)(notice the -16). Minimum rpm causes the timing below that rpm to not be touched. MHD doesn't even use the "Minimum Ignition Angle During Trailing Throttle (Base)" table in the mentioned XDF.

    While I was looking for some stock roms on bimmerboost, I found a this XDF which I found the table I was making was part of a bigger "Minimum Fuel Cut Delay (Normal)" table(Link). MHD only edits a portion of a tables.

    MHD mentioned they toggle a flag to get the burble how it sounds. I'm currently debugging a program that I wrote to convert the CANBUS data from a flash into a flashable bin. After that is complete, I should be able to do a full compare and see what bytes have changed.

    If you have those DAMOS files I would love to have them. I've been doing all my work just by reversing the flashes.
    I just understood that it's what did RFP on the V12 Map, the timing (main) is ranging from 2000rpm, from -18 to -30 in the first column (13).

    However, durations from XDF of this thread are stock, but my car burbled a lot.
  • kylerwinterd's Avatar
    kylerwinterd -
    Yeah I have been in contact with RFP. He put the burble / flame timing in after I showed him what MHD actually changes for burble aggressiveness. MHD just changes the timing of the lowest load column to -15 on "Hard". I sent Dean @RFP a video(LINK) of my car shooting flames when set to -30 timing. I guess he liked the idea of flames coming out on his tune. I sure as fuck love it.
  • kylerwinterd's Avatar
    kylerwinterd -
    Hey @CarAbuser, Why are you grabbing from what appears to be the middle of a 6x24 table for "Minimum Ignition Angle During Trailing Throttle (Factor)"? Your table starts at the curser and ends 8 bytes short of the end of the table.

    https://www.PorscheBoost.com/images/.../yDfrs0G-1.png
  • studio54's Avatar
    studio54 -
    Quote Originally Posted by kylerwinterd View Post
    Yeah I have been in contact with RFP. He put the burble / flame timing in after I showed him what MHD actually changes for burble aggressiveness. MHD just changes the timing of the lowest load column to -15 on "Hard". I sent Dean @RFP a video(LINK) of my car shooting flames when set to -30 timing. I guess he liked the idea of flames coming out on his tune. I sure as $#@! love it.
    Hmm okay not cool from RFP so.. He said in his V12 Facebook post that he added flames only for Stage 3, which is not true because it's set on Stage 2 too. I have secondary cats, i ran the Stage 2 tune for 20 minutes ... i hope it didn't damaged them.
  • CarAbuser's Avatar
    CarAbuser -
    I'm not, it's three tables stacked on top of eachother. Attachment 59950
  • KClemente's Avatar
    KClemente -
    You also may want to adjust the Min Ign Angle Vs EGT table. I don't quite understand or even want to learn how the DME calculates egt but it does have a way of limiting spark retard when it gets too hot.

    Imagine the pops (or engine damage) at negative 80 degrees of timing lol

    Many of the ignition tables have the ability to go all the way down to -90.

    Attachment 59952
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