Romraider Flex Fuel, I do end up having issues that need to be RomRaider - Open Source ECU Tuning RomRaider is a free, open source tuning suite created for viewing, logging and tuning of modern Subaru Engine Control Units and some older I really like this project to develop open source patches that can be mixed and matched, and I'd be especially interested in how interesting entrypoints are discovered and repurposed (e. Flex is easy on 02 Wrx. To support their RomRaider Open Source ECU Tools FAQ • Last visit was: Tue Jun 23, 2026 10:12 am It is currently Tue Jun 23, 2026 10:12 am Board index All times are UTC [ DST ] Last visit was: Fri Jun 19, 2026 2:43 am It is currently Fri Jun 19, 2026 2:43 am Last visit was: Mon May 25, 2026 8:03 pm It is currently Mon May 25, 2026 8:03 pm Here's what ive gathered for flex fuel converting my car, I'm sure there's more info out there so add anything you have. The intuitive tuning interface and powerful datalogger are That flex kit outputs ethanol as a voltage. Page 1 of 1 [ 2 posts ] Page 1 of 1 [ 2 posts ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » 100% Flex Fuel for 16bit Subarus Fo free Engine Management & Tuning RomRaider Open Source ECU Tools FAQ • Last visit was: Sat Jun 06, 2026 10:43 pm It is currently Sat Jun 06, 2026 10:43 pm Board index All times are UTC [ DST ] Download RomRaider ECU and Logger Definitions The latest RomRaider ECU and logger definitions, which may be updated independently of the software, can be found here: Subaru Download RomRaider ECU and Logger Definitions The latest RomRaider ECU and logger definitions, which may be updated independently of the software, can be found here: Subaru RomRaider Open Source ECU Tools FAQ • Last visit was: Fri May 29, 2026 6:45 pm It is currently Fri May 29, 2026 6:45 pm Board index All times are UTC [ DST ] Investigating a flex-fuel hack for A2WC522N and other ROMs Page 5 of 9 [ 121 posts ] Go to page Previous 1, 2, 3, 4, 5, 6, 7, 8, 9 Next Page 5 of 9 [ 121 posts ] Go to page Previous 1, 2, 3, Making a Subaru a true 'FLEX FUEL' vehicle Page 1 of 1 [ 8 posts ] Page 1 of 1 [ 8 posts ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Mazda RX-8 G-ROM Flex Fuel Patch + Romraider logger Test GarrettsSubaru 1. Make sure you have the latest ECU definitions which may be newer Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » How-To Guides All times are UTC [ DST ] CANBUS Flex Fuel sensor tuning Page 1 of 1 [ 1 post ] Page 1 of 1 [ 1 post ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Subaru Tuning All Q Does RomRaider only work with Subarus? RomRaider has the potential to work with most ECUs, as long as a method exists for extracting a copy of the ECU’s image from the vehicle in RomRaider Open Source ECU Tools FAQ • Last visit was: Thu Jun 11, 2026 8:35 pm It is currently Thu Jun 11, 2026 8:35 pm Board index All times are UTC [ DST ] Last visit was: Thu Jun 25, 2026 6:51 am It is currently Thu Jun 25, 2026 6:51 am Using RomRaider to edit tunes ( ROM) files OFT and non- OFT Software Tuning Maybe people could post their fuel map tuning methods to help out others. You can look through the speed density subforum. CarBerry patch is widely available on this forum. The tune needs to be modified on the fly to allow this. RomRaider Open Source ECU Tools FAQ • Last visit was: Wed Jun 24, 2026 2:52 am It is currently Wed Jun 24, 2026 2:52 am Board index All times are UTC [ DST ] RomRaider Open Source ECU Tools FAQ • Last visit was: Sat Jun 20, 2026 2:40 am It is currently Sat Jun 20, 2026 2:40 am Board index All times are UTC [ DST ] is flex fuel a thing? need help getting it setup. Feel free to reach out if you need help with the tune!Reach out i ETHANOL FLEX FUEL KITS FOR SUBARU VEHICLES TUNING WITH OPEN SOURCE AND LEGACY NON-GREEN CLOSED SOURCE TUNING PLATFORMS. You will only need to change the fuel at WOT (wide open throttle), which is around 5 values in one table. g. You do not have the required permissions to read topics within this forum. Most of the files containing these changes are already supplied. Especially some beginners who have just got into this. If you have any questions, be RomRaider Open Source ECU Tools FAQ • Last visit was: Wed Jun 03, 2026 9:39 pm It is currently Wed Jun 03, 2026 9:39 pm Board index All times are UTC [ DST ] Board index » Engine Management Systems - Analysis and Tuning » BMW » DME Tuning » MS41 Tuning All times are UTC [ DST ] RomRaider Open Source ECU Tools FAQ • Last visit was: Tue Jun 23, 2026 4:53 am It is currently Tue Jun 23, 2026 4:53 am Board index All times are UTC [ DST ] Who's going to be my flex fuel testers? 2013 WRX currently running methanol but swapping to e85 in the next week. 65K subscribers Subscribe Little explanation of how flex fuel works from a tuning side of things and to show how strong and tune-able the carberry rom is for the Subaru ecu. I put together my own flex fuel sensor setup using a thread I found Continuing the work of Merp and all others patches for 32 bit roms are available here (speed density, flex fuel, map switching on the fly, cel flash on knock, LC, FFS . RomRaider’s MAF scaling tab will plot your MAF sensor’s results and help you tune the scaling RomRaider’s injector Last visit was: Thu Jun 25, 2026 6:56 am It is currently Thu Jun 25, 2026 6:56 am Pop, bang, burble tuning a stinkeye WRX with open source, ECU-flash and romraider software. I can definitely help test flex fuel! Top dschultz Post subject: Re: Last visit was: Fri Jun 12, 2026 9:53 pm It is currently Fri Jun 12, 2026 9:53 pm RomRaider - Open Source ECU Tuning RomRaider is a free, open source tuning suite created for viewing, logging and tuning of modern Subaru Engine Control Units and some older Last visit was: Tue Jun 23, 2026 6:45 am It is currently Tue Jun 23, 2026 6:45 am RomRaider - Open Source ECU Tuning RomRaider is a free, open source tuning suite created for viewing, logging and tuning of modern Subaru Engine Control Units and some older Jump to: Select a forum ------------------ News General News RomRaider RomRaider Bounty Offers New Releases RomRaider Development RomRaider Discussion RomRaider RomRaider Forums Join our forums, the best place to find help and answers! RomRaider is developed and supported by volunteers working on their own time. But the UI and Once you have the ROM opened up in RomRaider, you should see an added list of tables and data under the tab named “Flex Fuel” These tables are the added tuneable parameters Q What is RomRaider? RomRaider is open source software (licensed under the GPL), developed by enthusiasts, which allows for tuning and data logging of Subaru ECUs without having RomRaider logger definition setup: After extracting the ZIP, open RomRaider settings and set the ‘logger definition location’ to the appropriate definition file. In this video we cover everything you need to know about ROMraider and Open Flash Manager. Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Subaru Tuning All times are UTC [ DST ] Zeitronix Ethanol Content Analyzer and Display Kit Red + Flex Fuel Sensor with Fuel L BRZ_HaVoKx Audio/Visual, Electronics, Infotainment, NAV 4 07-16-2016 06:43 PM Delicious Tuning In this video I am able to start data logging using the Romraider logger and send off my first logs to the tuner. - RomRaider/RomRaider Merpmod speed density Open Source Reflashes Welcome to the . 7:1 AFR Dangers of an Overly Rich Mixture Articles The Basics Getting Started With Logging Understanding Injector Duty Cycle MAF Scaling using RomRaider - Dweeb’s Guide Delta-Load Fueling Compensation The “ FMIC Rich They are not custom tunes like openflash will have to build you for the flex. i installed a IBR flex fuel kit with the tgv pass thru and used ecuflash to disable to tgv code i was getting , now how do i read the ethanol % with romraider ? when i select the tumbler A2ZJ710J Flex fuel needed Page 1 of 1 [ 2 posts ] Page 1 of 1 [ 2 posts ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Subaru Bounty Offers All times are 2007 STi Speed Density/Flex Fuel - Another Cobb Refugee Page 1 of 1 [ 3 posts ] Page 1 of 1 [ 3 posts ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » RomRaider RomRaider is a free, open source tuning suite created for viewing, logging and tuning of modern Subaru Engine Control Units. You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access Last visit was: Sat Jun 27, 2026 3:39 am It is currently Sat Jun 27, 2026 3:39 am From my understanding, Carberry is a program used with ROMraider to run Flexfuel among other parameters. 1b 10–07–09). You will be sent a base calibration file based on your vehicle, modifications, and fuel type via email. ) * Registered users SUBARU GREEN SPEED Flex Fuel Kits - NOW AVAILABLE! ETHANOL FLEX FUEL KITS FOR SUBARU VEHICLES TUNING WITH OPEN SOURCE AND LEGACY NON-GREEN CLOSED The flex sensor is just a way to understand the fuel composition, it can't actually make the car flex fuel. I just finished the Flex-Fuel setup with carberry. We cover where to find the CAL ID, how to add ECU definitions and more. On a factory ECU there are two main supported generations. You don’t have to run speed density to run merpmod. 8. Many things can be done with the Carberry ROM, including Speed Density and Hybrid Speed Density, Group N rally style anti-lag and 2-step launch control, on the fly map-switching, flex fuel, and more. so have any of you smart electrical engineers come up with a way to incorporate a flex fuel sensor into the ms41? if there is no possible way to do it into the programming what do you guys RomRaider Tuning Fuel Tuning Fuel Difference between AFR and Lambda lamda is the same for all fuels not just gasoline Stoich Mixture for Cruise 14. You are currently viewing our forum as a guest, which gives you limited access to view most discussions and RomRaider Open Source ECU Tools FAQ • Last visit was: Thu Jun 18, 2026 5:45 am It is currently Thu Jun 18, 2026 5:45 am Board index All times are UTC [ DST ] RomRaider - Open Source ECU Tuning RomRaider is a free, open source tuning suite created for viewing, logging and tuning of modern Subaru Engine Control Units and some older RomRaider Open Source ECU Tools FAQ • Last visit was: Tue Jun 23, 2026 7:54 am It is currently Tue Jun 23, 2026 7:54 am Board index All times are UTC [ DST ]. RomRaider Open Source ECU Tools FAQ • Last visit was: Fri Jun 26, 2026 6:54 pm It is currently Fri Jun 26, 2026 6:54 pm Board index All times are UTC [ DST ] RomRaider Open Source ECU Tools FAQ • Last visit was: Mon Apr 06, 2026 11:10 pm It is currently Mon Apr 06, 2026 11:10 pm Board index All times are UTC [ DST ] RomRaider is a free, open source tuning suite created for viewing, logging and tuning of modern Subaru Engine Control Units. 3. Some ecu’s have a flex fuel definition done already in merpmod. Once the engine is started, This document provides beginner tuning tips for RomRaider software. This is confirmed via multimeter at the sensor output and with romraider. RomRaider’s MAF scaling tab will plot your MAF sensor’s results and help you tune the scaling RomRaider’s injector Articles The Basics Getting Started With Logging Understanding Injector Duty Cycle MAF Scaling using RomRaider - Dweeb’s Guide Delta-Load Fueling Compensation The “ FMIC Rich RomRaider Open Source ECU Tools FAQ • Last visit was: Wed Jun 24, 2026 5:44 pm It is currently Wed Jun 24, 2026 5:44 pm Board index All times are UTC [ DST ] Zeitronix Ethanol Content Analyzer and Display Kit Red + Flex Fuel Sensor with Fuel L BRZ_HaVoKx Audio/Visual, Electronics, Infotainment, NAV 4 07-16-2016 06:43 PM Delicious Tuning Last visit was: Wed Jun 10, 2026 2:39 am It is currently Wed Jun 10, 2026 2:39 am I'm doing a custom flex fuel tune now that cobb has gone to hell so my patch tuner sent over a custom logger def for an e85 parameter but every time I select the XML as the logger definition file, it gives Download RomRaider Here You will also need to have the latest ROM definitions loaded into the RomRaider ECU editor, these definitions map out the maps in the ecu for you. The voltage would need converted to be viewed as ethanol %. The intuitive tuning interface and powerful datalogger are Flashing is generally easiest with ECUFlash, and logging with RomRaider. Most open source simply use ECUflash and ROMraider. Board index » Engine Management Systems - Analysis and Tuning » BMW » DME Tuning » MS41 Tuning All times are UTC [ DST ] An example; I have my flex fuel sensor installed and putting out a solid 0. GM and Continental make EC sensors but they output a square wave with varying RomRaider is a free, open source tuning suite created for viewing, logging and tuning of modern Subaru Engine Control Units. Once you buy the selected tune, he will make them available to download on your account and the definition file on the support Q What is RomRaider? RomRaider is open source software (licensed under the GPL), developed by enthusiasts, which allows for tuning and data logging of Subaru ECUs without having Last visit was: Thu Jun 04, 2026 12:57 am It is currently Thu Jun 04, 2026 12:57 am Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Subaru Tuning All times are UTC [ DST ] I found out few days ago that in Windows 11 somehow categories don't show up when using EcuFlash definitions, but with RomRaider definitions they work and this is under investigations CarBerry Rom Video Tutorial Open Source Reflashes Welcome to the . I go through the step-by-step process of how to download Romraider for ECU editing and data logging. 5v (no ethanol). The Last visit was: Fri May 08, 2026 6:35 am It is currently Fri May 08, 2026 6:35 am Q What is RomRaider? RomRaider is open source software (licensed under the GPL), developed by enthusiasts, which allows for tuning and data logging of Subaru ECUs without having Feature request : flex fuel and other for 2008+ Page 1 of 1 [ 8 posts ] Page 1 of 1 [ 8 posts ] Board index » RomRaider » RomRaider Development All times are UTC [ DST ] In this video, I go over the equipment needed to start open-source tuning. FlexFuel can be utilized by installing an Ethanol Content sensor which has a final output of a linear 0-5 Volts. It discusses the basic steps of tuning which include making data logs, analyzing the logs, and making changes to fueling, timing and Cross Flashing and Flex Fuel Patch - 2013 USDM WRX Page 1 of 1 [ 1 post ] Page 1 of 1 [ 1 post ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » RomRaider’s logger will record arbitrary parameters in real time. CAN This is a list of all Subaru ECUs currently supported by the latest RomRaider ECU definitions (0. I also show how to RomRaider’s logger will record arbitrary parameters in real time.
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