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Terry @ BMS Terry @ BMS is offline
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Default N54 G5 ISO Firmware & Notes - 10-11-2012, 10:21 AM

Use subject to terms and conditions posted at http://www.burgertuning.com/terms.html

THIS PART IS LEGAL FOR USE ONLY IN COMPETITION RACING VEHICLES AS DEFINED UNDER CALIFORNIA LAW, AND IS NOT LEGAL FOR USE IN ANY OTHER MOTOR VEHICLE. California law defines a "racing vehicle" as "a competition vehicle not used on public highways." (Calif. Health & Safety Code 39048) This part may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event. Competition-only motor vehicles may not be driven to a racing event on a public highway and must be transported on a trailer or other carrier. USE OF THIS PART IN ANY OTHER VEHICLE MAY SUBJECT YOU TO FINES AND PENALTIES FOR VIOLATION OF FEDERAL AND/OR STATE LAW, WILL VOID YOUR WARRANTY FROM BURGER MOTORSPORTS, LLC, AND CAN VOID YOUR VEHICLE'S WARRANTY. It is your responsibility to comply with all applicable federal and state laws relating to use of this part, and Burger Motorsports, LLC hereby disclaims any liability resulting from the failure to use this part in compliance with all applicable federal and state laws.


Hey guys,

This is the central post for all information related to the E series N54 G5 ISO firmware!

Please note that for any logs, bugs, concerns, problem reports, codes, etc, create a thread in the support section. Requests for assistance in this thread will be deleted without being read.

General Notes:

1) Posts to this thread that contain bug reports, logs, or tuning questions will be deleted without being read. If you need assistance post to the support forum.
2) G5 board must have diodes removed as shown in the photo below to run this firmware. BMS started shipping all boards as ISO early 2014. We've removed the diode photo to avoid confusion but if your firmware date is 10/1/12 before updating you need to cut them off before uploading ISO firmware. Click this link for the photo.
3) "Default Wastegate Position" determines the default wastegate position during idle and very low throttle. This can be adjusted in the laptop interface or in dash on menu 10. Higher settings can improve throttle response but may trigger wastegate rattle on older cars. Higher settings can also make the car feel uneasy or cause boost oscillation at lower throttle positions. Adjust in dash to suite your car / taste.
5) For a more in depth discussion on methanol settings and how to use map 3 without methanol read here.
6) Some addl info on custom tuning the JB4 boost control..
7) If using a 3.5bar TMAP sensor you need to set "N20 TMAP" to 1 after installing it, and also realize your FF/duty bias values will be approx 20% lower than they were with the 2.5bar factory sensor. An easy way to offset this is by setting your duty bias to 65 across the board instead of 50 (or 0) across the board to rerange the FF parameter.

***DO NOT UPLOAD FIRMWARE UNTIL YOU READ THIS *** The latest firmware later REQUIRES JB4 INTERFACE DATED 3/1/15 OR NEWER AND SETTING CHANGES. All Duty Bias (formerly CPS) must be set to 0 or 50 to avoid 30FF under boost codes. 3rd gear boost limiting should also be set to 0 to disable. Failure to do this will result in poor performance.***

G5_ISO_31

1) Changed menu 11 from "open loop" to "throttle sensitivity". Valid range is from 0 to 5000rpm. This new parameters controls the boost to gas pedal input relationship. A value of 0 will provide no boost target for the first 50% of pedal travel and then a linear mapping from 50% to 100% and make the pedal feel slightly dead in low travel, while a value of 5000rpm provides a linear mapping from 0% to 100% and will make the engine more responsive to pedal input. Firmware v30 had an equivalent setting of 500rpm. Note this value will default to 0 for most of you so be sure to set it after loading the firmware.
2) Adjusted menu 12 minimum duty cycle from a soft limit to a hard limit, and made corresponding programming and logical changes to allow this to function properly. The net result is smoother low throttle operation and less wastegate rattle under low throttle boost. Note the car will now be more sensitive to menu 12 being set overly high. The default setting is 2800rpm.
3) Temporarily changed "duty cycle" in JB4 logs to "calculated torque" as a diagnostic tool for back end flash map development.
4) Adjusted boost by gear cap menus to reflect 0-5000rpm = 0-20psi, making adjustment on the fly easier. Added 3rd gear under menu 15.
5) Revised map 3 when used with a 3.5bar TMAP sensor (e.g. cars with inlets and/or larger turbos) to target much more aggressive meth targets for a given additive. A 75 additive is a 25psi map now with the 3.5bar TMAP sensor installed.
6) v31.1: Changed the parameters for menu 12. The new range is from 1500rpm to 3000rpm. Which represents from 15% to 30% duty cycle. 30% duty cycle is enough to cause problems in some cars but higher levels just don't make sense with the new logic. Any setting of over 30% will be revert to 30%.
7) v31.4: Revised spool up logic to be more aggressive.
8) v31.4: Added FUD=95 setting for larger than OEM turbo duty bias tuning.
9) v31.5: Added meth_safety mode = 4 to enable a progressive meth safety for all maps when selected.
10) v31.5: Adjusted meth_safety mode = 2 to apply to all maps when selected.
11) v31.5: Adjusted spool up code to disable once boost target is reached during a pull to avoid oscillation resulting from misadjusted FF curves.
12) v31.5: Adjusted boost by gear for automatics to hold gear target until the transmission has initiated it's shift. Previously target would change when the shift was requested.
13) v31.6: Change to anti-lag logic to correct cold weather bug.

G5_ISO_30

1) Made a PID change to reduce boost/PWM oscillation that had cropped up in v28.
2) Restored duty bias range down to 0 reversing ISO_29 point 1. We're finding the increased range useful for high flow inlet vehicles.

G5_ISO_29

1) Modified duty bias & 3rd gear limiter such that duty bias values of 30 and below are ignored, and 3rd gear boost limit values of 10psi or below are ignored. This should help those who update firmware without reading the directions.
2) Modified fuel trim reading such that 0 = -33% fuel trims, 25 = 0% fuel trims, and 50 = +33% fuel trims.
3) Added a setting under FutureUseD = 98 that may help with wastegate rattle during decel.


JB4 Interface: Latest Interface Download. When updating your interface you may need to first go to "add remove programs" and "remove" your previous JB4 interface.

For those running larger single turbo systems refer to these special notes on how to configure the JB4.

Wheel control guide:





***DO NOT UPLOAD FIRMWARE UNTIL YOU READ THIS *** The latest firmware later REQUIRES JB4 INTERFACE DATED 3/1/15 OR NEWER AND SETTING CHANGES. All Duty Bias (formerly CPS) must be set to 0 or 50 to avoid 30FF under boost codes. 3rd gear boost limiting should also be set to 0 to disable. Failure to do this will result in poor performance.***

Note for some reason Internet Explorer will attempt to save your HEX file as an attachment.php file. Just rename it after downloading or use another browser like Mozilla.
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