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    • BMW N54 AccessPORT Beta Race Fuel and E-30 Maps



      COBB Tuning is proud to announce the immediate availability of Beta Race Fuel Maps and E-30 Blend Fuel Maps for Stage2+ AccessPORT equipped BMW N54 vehicles! Gains of 50% more power over a stock N54, and +40HP / +45lb-ft torque over our Stage2+ Aggressive maps are just a flash and a fill-up away. These Race and E-30 maps provide the ultimate in plug-and-play performance for the driver looking for the most from their BMW. If your vehicle meets the hardware requirements for this map, and you have access to 100 octane race fuel, or E-85 fuel, acquiring this level of performance has never been easier. Simply download one of our free Beta Race or E-30 maps, reflash your DME with the AccessPORT, fill-up with the appropriate fuel and experience the rush of high-octane power gains.




      These new Beta Race and E-30 Fuel Maps include adjusted boost levels, fuel delivery, ignition timing and base programming logic to improve performance and reduce DME intervention that conflicts with driver input. In addition, the speed limiter and rev limits have been raised. In simple terms, with the torque and load limiters moved out of the way, fuel mixtures and timing adjusted for race fuel, and driver nannies pushed aside, we have enabled the N54 to deliver big power gains and consistent power delivery with simple bolt-ons and a diet of race gas or an E-30 blend.

      In order to use these maps the following conditions must be met:



      • Access to high quality race fuel with a minimum octane rating of 100 AKI (105 Ron) or greater for Race maps, or access to E-85 and 93 octane (98 Ron) or greater to achieve a blend of 30% ethanol for E-30 maps
      • Requires upgraded intake system (DCI, panel filter or similar)
      • Requires upgraded front-mount intercooler and piping (FMIC)
      • Requires upgraded downpipes
      • Highly recommend upgraded cat-back exhaust system



      With great power comes even greater responsibility, and these maps are no exception. Data logging vehicle performance is an absolute requirement when using these maps to ensure that the mechanical systems of your BMW and the quality of fuel are up to the task of supporting these Beta Race and E-30 maps. Instructions on how to data log, which parameters to log, and how to evaluate engine performance are explained in this BMW Race and E-30 Fuel Data Logging Instructions document.

      It doesn't get much easier than this. There are no firmware updates required and there is no need to perform an AccessPORT Uninstall and Install. Just download the appropriate map, transfer to your AccessPORT, flash your DME, fill up with the proper fuel and go. For assistance with the map download and transfer process, just follow this Step-By-Step Map Download and Install Tutorial.

      If you are ready to experience huge power gains and refined power delivery with simple supporting mods and race gas or E-30, head on over to our BMW AccessPORT Off-The-Shelf Map Database, click on the Race Maps link, and download your free Beta Race or E-30 Map to get your adventure rolling!


      This article was originally published in forum thread: BMW N54 AccessPORT Beta Race Fuel and E-30 Maps started by COBB Tuning View original post
      Comments 136 Comments
      1. lulz_m3's Avatar
        lulz_m3 -
        @Flexinator, if your manual, trying shifting without dumping the clutch, try to slip the clutch just a tad after your shift. This stops it for me.
      1. Flexinator's Avatar
        Flexinator -
        I bet that will work... Will try and report back
      1. bmw335iguy's Avatar
        bmw335iguy -
        So ive been checking my STFT and LTFT on these new e30 maps and have some conflicting information. I have CA 91 octane so I originally changed the fuel scalar to 1.186 seeing as I run e45. My STFT at WOT were -29 and my LTFT are +30? So I changed the scalar to 1.16 with little to no change in trims. I also filled up with a 50/50 91/e85 the last two trips to the pump to see if that would help keep my STFT from being so negative. I'll continue to drop the scalar down if thats whats needed, just thought it was weird that the trims are polar opposites.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by bmw335iguy Click here to enlarge
        So ive been checking my STFT and LTFT on these new e30 maps and have some conflicting information. I have CA 91 octane so I originally changed the fuel scalar to 1.186 seeing as I run e45. My STFT at WOT were -29 and my LTFT are +30? So I changed the scalar to 1.16 with little to no change in trims. I also filled up with a 50/50 91/e85 the last two trips to the pump to see if that would help keep my STFT from being so negative. I'll continue to drop the scalar down if thats whats needed, just thought it was weird that the trims are polar opposites.
        That is strange. Are you running meth? I would reset the ecu next fill up and monitor the trims for a bit.
      1. bmw335iguy's Avatar
        bmw335iguy -
        Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
        That is strange. Are you running meth? I would reset the ecu next fill up and monitor the trims for a bit.
        No meth. I'll give the ecu reset a shot.
      1. bmw335iguy's Avatar
        bmw335iguy -
        Click here to enlarge Originally Posted by bmw335iguy Click here to enlarge
        So ive been checking my STFT and LTFT on these new e30 maps and have some conflicting information. I have CA 91 octane so I originally changed the fuel scalar to 1.186 seeing as I run e45. My STFT at WOT were -29 and my LTFT are +30? So I changed the scalar to 1.16 with little to no change in trims. I also filled up with a 50/50 91/e85 the last two trips to the pump to see if that would help keep my STFT from being so negative. I'll continue to drop the scalar down if thats whats needed, just thought it was weird that the trims are polar opposites.
        Here's a log showing the wacky fuel trims. I also noticed my timing on cylinder one isn't matching the targets in the e30 map, but I'm not showing any timing corrections? I'm also getting some pretty bad throttle closures mid pull as well. Any thoughts??? For some reason I can't rename the file to a txt so I had to zip it. Back on my windows xp laptop I was able to easily rename a csv file, but now on my windows 7 laptop it doesn't show the the csv tag at the end of my datalogs file name's. They all just say datalog1, datalog 2, datalog 3 ect...And if I rename it datalog1.txt it still adds the csv to the end and then I cant upload the file.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by bmw335iguy Click here to enlarge
        Here's a log showing the wacky fuel trims. I also noticed my timing on cylinder one isn't matching the targets in the e30 map, but I'm not showing any timing corrections? I'm also getting some pretty bad throttle closures mid pull as well. Any thoughts??? For some reason I can't rename the file to a txt so I had to zip it. Back on my windows xp laptop I was able to easily rename a csv file, but now on my windows 7 laptop it doesn't show the the csv tag at the end of my datalogs file name's. They all just say datalog1, datalog 2, datalog 3 ect...And if I rename it datalog1.txt it still adds the csv to the end and then I cant upload the file.
        Go to organize > Folder and Search Options, then click the View tab. Uncheck the box titled "Hide extensions for known file types" This will allow you to change the file type.

        As for the log, your getting throttle closures because of an overboost condition, and those fuel trims are definately wacky. I would try to reset the ecu and log LPFP req & Actual, HPFP req & Actual on top of the bank 1 & 2 short and long term fuel trims to rule out any strange fuel anomolies.
      1. Josh@Cobb's Avatar
        Josh@Cobb -
        Click here to enlarge Originally Posted by bmw335iguy Click here to enlarge
        So ive been checking my STFT and LTFT on these new e30 maps and have some conflicting information. I have CA 91 octane so I originally changed the fuel scalar to 1.186 seeing as I run e45. My STFT at WOT were -29 and my LTFT are +30? So I changed the scalar to 1.16 with little to no change in trims. I also filled up with a 50/50 91/e85 the last two trips to the pump to see if that would help keep my STFT from being so negative. I'll continue to drop the scalar down if thats whats needed, just thought it was weird that the trims are polar opposites.

        Your LTFTs and STFTs are fighting each other, but should correct themselves as you put miles on the car (with varying states of driving). As the DME sees that short terms are regularly negative, it will start to work that into the long terms and both will approach zero. Keep an eye on them as they are keeping your actual final trim (STFT and LTFT together) close to zero now, but since they're almost maxed in opposite directions, it would be good to watch them. Make sure your AFR's stay near their request.

        As stated, it looks like you're getting some throttle closures due to boost overshoots. You could either modify the WGDC(Main) table to correct these, or try copying the WGDC values from another OTS map (stage 2 for example). Thanks for providing the logs, this is the type of feedback that helps us get the best possible final maps out for release.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by Josh@Cobb Click here to enlarge
        Your LTFTs and STFTs are fighting each other, but should correct themselves as you put miles on the car (with varying states of driving). As the DME sees that short terms are regularly negative, it will start to work that into the long terms and both will approach zero. Keep an eye on them as they are keeping your actual final trim (STFT and LTFT together) close to zero now, but since they're almost maxed in opposite directions, it would be good to watch them. Make sure your AFR's stay near their request.

        As stated, it looks like you're getting some throttle closures due to boost overshoots. You could either modify the WGDC(Main) table to correct these, or try copying the WGDC values from another OTS map (stage 2 for example). Thanks for providing the logs, this is the type of feedback that helps us get the best possible final maps out for release.
        Josh, thats good info. If im understanding this correctly, the DME monitors STFT, and over time applies them to the long term fuel trims. Does the DME adjust its base fuel calculations on a historical pattern (LTFT's) per rpms/load? Or is the LTFT just a compensation it performs to its underlying calcalations per rpm/load?
      1. Josh@Cobb's Avatar
        Josh@Cobb -
        STFT and LTFT are both compensations for any rich/lean condition. Since they're both dynamic (STFT's more-so), you can consider them a factor for final fuel delivery. Your LTFT's are for persistent conditions, so they could also be considered part of the base, but they will change based on what STFTs do over a given time. STFTs are great to monitor for real-time changes, but they're meaningless if you don't know where the LTFTs are at the same time. (ie. STFTs of 0% with LTFTs maxed is not a good thing).

        Part throttle driving with various load and pedal position is normally the quickest way got trims to learn.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by Josh@Cobb Click here to enlarge
        STFT and LTFT are both compensations for any rich/lean condition. Since they're both dynamic (STFT's more-so), you can consider them a factor for final fuel delivery. Your LTFT's are for persistent conditions, so they could also be considered part of the base, but they will change based on what STFTs do over a given time. STFTs are great to monitor for real-time changes, but they're meaningless if you don't know where the LTFTs are at the same time. (ie. STFTs of 0% with LTFTs maxed is not a good thing).

        Part throttle driving with various load and pedal position is normally the quickest way got trims to learn.
        Good stuff. Do you know if the fuel trims are a factor that is applied to all fuel calculations across the board, or is it similar to the 1M fuel scalar in that it is adjusted based on fuel trims per specific load and rpm?
      1. Josh@Cobb's Avatar
        Josh@Cobb -
        Click here to enlarge Originally Posted by lulz_m3 Click here to enlarge
        Good stuff. Do you know if the fuel trims are a factor that is applied to all fuel calculations across the board, or is it similar to the 1M fuel scalar in that it is adjusted based on fuel trims per specific load and rpm?
        The trims are not absolute, which is why you'll see them fluctuate (LTFT and STFT). So yea, kinda like the 1M fuel scalar. If you look at the log that bmw335iguy posted, you'll see that the short terms and long terms are both changing throughout the pull. You'll normally see even more variation on part throttle logs.
      1. lulz_m3's Avatar
        lulz_m3 -
        Click here to enlarge Originally Posted by Josh@Cobb Click here to enlarge
        The trims are not absolute, which is why you'll see them fluctuate (LTFT and STFT). So yea, kinda like the 1M fuel scalar. If you look at the log that bmw335iguy posted, you'll see that the short terms and long terms are both changing throughout the pull. You'll normally see even more variation on part throttle logs.
        Thanks for the explanation!
      1. rader1's Avatar
        rader1 -
        I love discussions like this!!!!
      1. bmw335iguy's Avatar
        bmw335iguy -
        Click here to enlarge Originally Posted by Josh@Cobb Click here to enlarge
        Your LTFTs and STFTs are fighting each other, but should correct themselves as you put miles on the car (with varying states of driving). As the DME sees that short terms are regularly negative, it will start to work that into the long terms and both will approach zero. Keep an eye on them as they are keeping your actual final trim (STFT and LTFT together) close to zero now, but since they're almost maxed in opposite directions, it would be good to watch them. Make sure your AFR's stay near their request.

        As stated, it looks like you're getting some throttle closures due to boost overshoots. You could either modify the WGDC(Main) table to correct these, or try copying the WGDC values from another OTS map (stage 2 for example). Thanks for providing the logs, this is the type of feedback that helps us get the best possible final maps out for release.
        Thanks Josh and lulzm3, I thought that perhaps since my STFT and LTFT were polar opposites that maybe they canceled each other out. I will keep an eye on them and get some logs including my LPFP and HPFP as well. I'm not advanced enough on changing the base wgdc but I know how to copy and paste so I did that with the Stage 2+ aggresive v301 map and will get some more logs today.

        Any idea why my timing curve isn't following what it should be even though I'm not showing any timing corrections? Could that be due to the overboost condition? When going WOT there likes a 1-2 second delay were I see boost quickly spike to over 20 according to my in dash gauge running jb4 on map 4, then it feels like the timing goes from 0 degress to 10-12 and the car takes off. It doesn't do that every time, but I'd say 9/10 WOT's is has that same feeling. Thanks for the help guys!
      1. bmw335iguy's Avatar
        bmw335iguy -
        Josh@Cobb Here are a few more logs with the default channels logged on the e30 map. In those logs I was running an e45 blend and did get some timing corrections and the car didn't have much time to adapt since loading the e30 map. Hope they help bringing the beta to full release!
      1. Josh@Cobb's Avatar
        Josh@Cobb -
        Click here to enlarge Originally Posted by bmw335iguy Click here to enlarge
        Thanks Josh and lulzm3, I thought that perhaps since my STFT and LTFT were polar opposites that maybe they canceled each other out. I will keep an eye on them and get some logs including my LPFP and HPFP as well. I'm not advanced enough on changing the base wgdc but I know how to copy and paste so I did that with the Stage 2+ aggresive v301 map and will get some more logs today.

        Any idea why my timing curve isn't following what it should be even though I'm not showing any timing corrections? Could that be due to the overboost condition? When going WOT there likes a 1-2 second delay were I see boost quickly spike to over 20 according to my in dash gauge running jb4 on map 4, then it feels like the timing goes from 0 degress to 10-12 and the car takes off. It doesn't do that every time, but I'd say 9/10 WOT's is has that same feeling. Thanks for the help guys!
        Get the boost overshoots sorted out, then get more logs. It'll be easier to look at everything when we have as much as possible running where it should. The timing dip could have to do with throttle closures, but this will help us get a better idea.
      1. bmw335iguy's Avatar
        bmw335iguy -
        Click here to enlarge Originally Posted by Josh@Cobb Click here to enlarge
        Get the boost overshoots sorted out, then get more logs. It'll be easier to look at everything when we have as much as possible running where it should. The timing dip could have to do with throttle closures, but this will help us get a better idea.
        Sounds good, thanks again!
      1. Jason@Cobb's Avatar
        Jason@Cobb -
        Click here to enlarge Originally Posted by TLO03 Click here to enlarge
        Can someone point me to this Jason guy, what kinda mods dose he have?
        Click here to enlarge < Jason.

        The Jason he speaks of is ME! My car is basically a stage2+ 535Xi. Click here to enlarge

        Cheers!
        Jason
      1. enrita's Avatar
        enrita -
        So there are differences to the WGDC between OTS STage 2+ and E30 map? is only the WGDC BASE map that should be modified in case of overshoot?