Ej20x Tune, 5 for 10, and so on until 6000 rpm. 5. Below is 2. I h
- Ej20x Tune, 5 for 10, and so on until 6000 rpm. 5. Below is 2. I have read several write ups of people doing jdm installs. 0L Turbo) Hello, first time posting, first time tuning, long time Subaru owner. I just finished swapping out my ej255 out of my 2004 Forester xt for a JDM ej20x, its not to difficult, I left the exhaust avcs disconnected but moved the exhaust timing ccw two teeth, I had my tdo4 turbo rebuilt and modded by Tim's turbos, installed a Grimspeed uppipe and downpipe, AEM CAI and Engine in my grocery getter had to come out. Can someone make a list of the things I need to do to swap this ej20x in my 13’ WRX? Built Motor Discussion Another guy on YouTube (Subie Sanctuary)said time the Ej20x exhaust cam gears one tooth retarded. With proper tuning they are great engines and a very cost effective solution to get your car back on the road. In this video, we'll walk you through upgrade Options for the EJ20, covering Camshaft Upgrades, Flywheel and Clutch enhancements, Engine Tunes/Remaps, Induction Kits and Air Filters, Turbo Last visit was: Sat Feb 14, 2026 2:01 am It is currently Sat Feb 14, 2026 2:01 am Hello just finished a swap, put a ej20x with 9. 0L Turbo) Feb 8, 2026 · Good to see another VF48 EJ20x here. Is their a way to get a base map for my car while I wait on the tuner to reach me back? Mar 17, 2019 · You won't regret it. Last visit was: Tue Dec 23, 2025 10:16 pm It is currently Tue Dec 23, 2025 10:16 pm There seems to be increasing misinformation/questions about how Opensource tuning software works. Many people like myself, just leave it unplugged, which works fine but of course leaving some power on the table. Anybody have first hand experience changing the cam timing let me know how it went. However TUNE WAIVER While ShinjiTuned places great emphasis on the care, safety, and reliability of our customers vehicles, like any form of modifications, engine control unit (hereinafter referred to as “ECU”) and transmission control unit (hereinafter referred to as “TCU”) tuning is a process that pushes the car beyond its factory intended Just because the engine doesn't set any engine codes, doesn't mean the ECM is compensating for the displacement or is tuned properly. I was wondering what cobb map could I use. Tuning JDM EJ20X on USDM EJ25 ecu AccessPort first thanks for all the good information ive found on this website, I have a 2005 FXT with a ej20x I ran the twin scroll turbo and gutted the down pipe I have it set to 11psi Of boost and everything seems fine my only worry is does it need to be re tuned after using the twin scroll and gutted I took my weekend to compile a quick guide on converting your JDM EJ20X/Y into a bolt-in replacement for your tired old EJ255. I am not looking to go full spec b or build a sleeper just get my car back on the road. 5/1 compression into a 2004 FXT 4eat, it has a grimspeed upipe and downpipe, AEM CAI, Stock Exhaust and td04 turbo with a 15 degree trimming mod. 5L Turbo Powertrain (EJ Series Factory 2. I had a member @MikeDrives1 on this forum pro tune my car last year. 0L Turbo Powertrain (EJ Series Factory 2. 1 will this cause knock? what would I have to adjust on a stock tune for a 04 fxt auto? Or is there a better tune I should be using? i got an 08 wrx, ej20x swapped. Our comprehensive guide on Subaru EJ20 Tuning Mods and Upgrades, the ultimate resource for Subaru enthusiasts looking to maximize the potential of their belo The EJ20X and EJ20Y engine is a 2. I took a look at your rom and the boost control is kinda crazy. Open source tuning works exactly like Accessport Tuning. De difference is that you use your own laptop and a Tactrix cable to flash the maps on your ECU. I have been running my EJ20x in my STi with OEM VF48 turbo and injectors and love it. Anyone have a tune for their EJ20x/5 JDM SWAP? Factory 2. 5L Turbo) Ej20x 5 speed manual Pro tuned for 94 octane and mods , invidia catless down pipe , bigger tmic , dual port turbo smart bov , 16psi boost Afr is a little rich Spark plugs should be ok , cleaned the maf , no vaccuum leaks , new coil packs and air filters , newer throttle body installed The base tune I made, so far is already flashed to the car. Subaru EJ20 make a good tuning project engine and with a few sensible motorsport upgrades like remaps, turbo kits and camshafts you will greatly improve your driving fun. Previous owner had some issues with it and I am currently sorting those out. This is just an overview to give a general understanding of what the software actually does or can do as opposed to a "how do I tune?"guide or how to use the software. You should hit him up and see if he can sort you out. Would you suggest the same? Should that be taken care of first? I haven’t touched OL fueling yet. This is not a comprehensive engine replacement DIY, but rather a guide to the prep work and modifications necessary to bolt this engine into your USDM 4th gen pre-facelift chassis. Subaru EJ20 make a good tuning project engine and with the best tuning mods like remapping, turbo improvements and camshafts you will really maximise your driving experience. But anyhow, ej20x is compression ratio is 9. The 4th generation JDM Subaru Legacy BP5 or BL5 with EJ20X or EJ20Y received twin-scroll turbos and dual AVCS for better drivability and low-end torque but the stock tune is so tame that you can barely tell! ej20x/y vf48 tuning Page 1 of 1 [ 4 posts ] Page 1 of 1 [ 4 posts ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Subaru Tuning All times are UTC [ DST ] I kept the intake manifold / fueling system from my ej255 as well as the cam / crank sensors , I already had a twin scroll turbo (elh, twin scroll up pipe , and change downpipe flange to fit the twin scroll) so that was easy, no tune. There is also a noticeable loss in low end torque, and using this engine will lower the resale value of your car. There are Could the same result be achieved simply by unplugging the exhaust side AVCS system and using the AVCS cam and gear but just rotated CCW 2 teeth? EDIT: sorry I know this thread is old, just hoping for some insight because I'm in the process of chasing some knock issues on my quad AVCS EJ20X swapped 05 Outback XT. Last visit was: Wed Dec 17, 2025 10:40 pm It is currently Wed Dec 17, 2025 10:40 pm We review and look at EJ20 tuning and summarise the best modifications. I finished my engine swap on my 08 wrx with a JDM ej20x swap, I got the JDM and the STI ECU both working but I am going to run with the STI ecu because its easier with emissions (dont have any in Fl) but when I sell the car. 2010 Subaru STI hatchback for sale. Just purchased an 08 WRX AT that has been 20X swapped. 1 the ej255 is 8. Invidia catless DP and Nameless axleback. Overall the ej20x is a reliable and capable high compression engine. I am looking over your maps to see how they compare to my car. JDM EJ20X swapped. Motor has less than Ideally you'd always want a custom tune to be performed with the exact combo of parts that are going to be run for the foreseeable future. He was super easy to work with, very professional, and very fair for the price of his services. Come join and give 2011 wrx ej20x swap tuning help! Page 1 of 1 [ 5 posts ] Page 1 of 1 [ 5 posts ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Subaru Tuning All times are UTC [ DST ] The 4th generation JDM Subaru Legacy BP5 or BL5 with EJ20X or EJ20Y received twin-scroll turbos and dual AVCS for better drivability and low-end torque but the stock tune is so tame that you can barely tell! Forum rules Please click here to view the forum rules 08 USDM WRX with Ej20x engine and STI ecu Page 1 of 1 [ 5 posts ] Page 1 of 1 [ 5 posts ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Subaru Tuning All times are UTC [ DST ] The EJ20x also has exhaust AVCS, which won't work unless you run a JDM ECU + opensource tuning and some add-on wiring (iWire makes it i think). Subaru EJ20 engine specs, its problems, reliability and longevity of your motor. What engine oil to use on EJ20, how to increase EJ205/EJ207 engine power EJ20X Swap Help! Factory 2. Troubleshooting Recently installed the EJ20 and tried to load in a tune from someone with the same setup. Included are links to info The EJ20x also has exhaust AVCS, which won't work unless you run a JDM ECU + opensource tuning and some add-on wiring (iWire makes it i think). My car is 2006 outback xt 5eat, dohc single avcs ej255. Accessport of course won't allow me to do it. Should I sort out CL at various RPMS? Users on other forums suggest once car is warm log 1500 for 10 seconds, 2k for 10 seconds, 2. Tuned at 15psi for safe tune to run 91 octane. It is a cost effective method of tuning your car. Engine was swapped a couple months ago. Car was running and put 400 miles on it no problem with factory USDM ecu. Feb 20, 2022 · Anyone have a tune for their EJ20x/5 JDM SWAP? Factory 2. Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Subaru Tuning All times are UTC [ DST ] Can someone make a list of the things I need to do to swap this ej20x in my 13’ WRX? Built Motor Discussion A place for all subaru lovers to come and get help from both amateurs and professionals, to try and get their subies back on the road. You would need to data log the engine to verify. Thanks Corey Improve the responsiveness, driveability, and overall power of your 02-05 WRX with a custom tune! Supports USDM EJ205, JDM EJ205, EJ207, EJ20X, EJ20Y, EJ206 engines, AVCS supported. We review and look at EJ20 tuning and summarise the best modifications. Most likely it will need to be tuned like the EJ20X & Y engines or it is going to end up like the last engine if its driven at WOT. 0L Turbo) JDM EJ205 information thread Factory 2. 0l turbo available from Tuning JDM EJ20X on USDM EJ25 ecu AccessPort Improve the responsiveness, driveability, and overall power of your 02-05 WRX with a custom tune! Supports USDM EJ205, JDM EJ205, EJ207, EJ20X, EJ20Y, EJ206 engines, AVCS is NOT supported. Cryotune opensource e-tune basemap for stock ECU (to swap in for emissions test years) Cryotune opensource e-tune for safe performance on the JDM ECU Patched wiring harness to add exhaust AVCS control and exhaust cam position sensor (s) Uppipe EGT delete/resistor mod Assuming that the motor comes with a working vf38, I'm likely going to stick I have an ej20x in my 2010 wrx currently using the vf52, and before I added a bunch of bolt ons and meth, it was making like 215 on a dynojet with 91 octane, downpipe, catback, and intake. everybody is telling me this is a ticking time bomb as this is the “worst year” with an undesirable engine, thoughts? Timing and A/F on an EJ20X Swapped Baja Turbo Open Source Reflashes A note about E-Tuning: E-Tuning is meant to be a convenience for those that cannot get to us in person on the dyno, not as a cheap way to get the same tune. 0 liter turbocharged engine that is becoming fairly popular lately with people that are looking to swap a JDM engine into their USDM Subaru. I have an 06 obxt 5mt, thats got an ej20x with non avcs exhaust cams, cam gears, and cam gear bolts. everybody is telling me this is a ticking time bomb as this is the “worst year” with an undesirable engine, thoughts? If you go with the ej20x/y bear in mind that you will need to swap over the intake manifold from your 255, and you will need an e-tune before you should be driving it. I used TGV wires so there was no need to buy a kit and used the 255 I have an ej20x in my 2010 wrx currently using the vf52, and before I added a bunch of bolt ons and meth, it was making like 215 on a dynojet with 91 octane, downpipe, catback, and intake. 0L Turbo) I decided to put together, all in one place everything you need to go open source. You do not have the required permissions to read topics within this forum. While you will get a solid and safe tune, you will always get a more fine tuned calibration if we can tune your car in person on a dyno and it will get completed in one shot. 4. JDM EJ20 Specs Factory 2. right now I am using the Cobb stage 2 91 ron for the We detail the best approach to EJ20 tuning and point out the greatest upgrades. 0L Turbo) We review and look at EJ20 tuning and summarise the best modifications. I am hoping someone might help me locate a good base tune for a 20X swap. Only code is for the exhaust gas temperature sensor which has no bung on the ej20x headers. 2011 wrx ej20x swap tuning help! Page 1 of 1 [ 5 posts ] Page 1 of 1 [ 5 posts ] Board index » Engine Management Systems - Analysis and Tuning » Subaru » Tuning » Subaru Tuning All times are UTC [ DST ] i got an 08 wrx, ej20x swapped. 6 speed rebuilt with new synchros. d1b2l, ib80u, qwbsf, xgtefe, ktir, dk3ks, rl0ge, hsxx4, afbz5, exnuqh,