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  1. NEW Pure 900 turbo

    Personally I wouldn't run JB4 at all with a non-stock turbo. If you can't afford to get an unlock and proper MHD/BM3 tune to go with your turbo upgrade, you shouldn't be buying the turbo upgrade in the first place. All JB4 does is control boost and wastegate parameters by fooling the ECU, so I...

  2. Bootmod3

    If you're not overly worried about power gain and just want some extra power on a stock setup, it's a lot cheaper and easier to just run a JB4. It's more or less a glorified boost controller, but will get you around 30-40 more WHP on 93 Octane (and can get you into the upper 400's with a catless...

  3. Lol Supra haters 🤷🏻‍♂️

    Thank you for the info. Currently she is my only means of transport and I work M-F 8-5 so yeah, not having an operating vehicle is a big factor. Sure, I could rent a car but once the dme leaves my hands there's no telling what can/will happen despite anyone's "gurantees". If you can recommend a...

  4. Lol Supra haters 🤷🏻‍♂️

    uggh. most of the shops in FL i dont trust at all. If what youre looking for is to switch from JB4 to a proper tune, just do this: Europerformancecenter for the femto trip and unlock BM3 if you only ever plan to do VERY simple mods. MHD otherwise. Find a good remote tuner. If you REALLY need...

  5. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    ? So there’s good chunk of meat left on the bone going unlock Vs JB4

  6. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    stock/high flow cats are running high 7s on MHD E40 catless custom tune MHD E50 can run 7.3s for added context, OTS MHD E40 and OTS BM3 E50 are pretty much bumper to bumper (AT)(AT)(AT) idk about MT numbers down here :D

  7. Lol Supra haters 🤷🏻‍♂️

    Just thought I would share an interesting experience. I drive a 2020 LE, couple basic mods like DP, intake, charge pipe and jb4. I've been running w the jb4 for a few months and overall I like it but I am looking to fully unlock and go bm3. I called a tuning shop today and had my first...

  8. What did you do to your Supra today?

    BM3 for now. Custom tune a little bit later down the line. Will also have a catless downpipe and flex fuel kit going on later in the week, hopefully.

  9. MANUALS ONLY ENTER THIS THREAD

    That BMW service guy is gonna need two weeks to get that 2020 ECU for you.

  10. MANUALS ONLY ENTER THIS THREAD

    People can be rude as hell on the forums because it's the internet. I'll answer some of your questions: Manuals don't need JB4, the ecu is different, just remove it (be sure to unplug the battery first) and bring it to a BMW dealership and tell the service guy that you would like to swap it...

  11. engine/intake noise changed - "air rushing" noise - boost leak?

    Sure, Give this a read: https://ecutek.atlassian.net/wiki/spaces/SUPPORT/pages/1668677661/Injection+Monitoring+B58g1+onwards My understanding is that the injection monitoring tolerances are much tighter on MT than AT. Its probably HPFP related, since there is no issue with JB4 on MT cars over...

  12. engine/intake noise changed - "air rushing" noise - boost leak?

    Would you mind elaborating on the MT injection monitoring topic? I am planning upgrades for my MT and am trying to collect any and all differences or concerns between the auto and manual tuning & hardware. I know the manual ECU can’t be cloned and that the reflex wiring is different, among some...

  13. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    For anyone on the fence about the FP upgrade, here's a 91/E40 car running trims at 25-35. It has similar boost and timing to a MHD/BM3 OTS E40 map, so I would expect similar power though it runs leaner on JB4. https://datazap.me/u/coloneladama/log-1734845093?log=0&data=1-2-3-4-11-14-15 So...

  14. Fuel-It Flex Fuel Kit for the MT Supra

    Just saw this! I will look into this option, they told me its the same way as installing a flex fuel kit for BM3. The video still shows tapping into the TCU connector which i dont have, so i might have to tap into the passenger footwell like you mentioned. Reference #1 Fuel-It! BM3 CANflex...

  15. JB4 for noobs (beginners)

    to bring this back from the dead ... Jesse spent a lot of time with me getting my car dialed in on an e30 jb4 tune and right now i am keeping up with a lot of other supras with flash tunes ... as fast as or faster than most of the unlocked bm3 93 octane guys and really only lost by about 1.5...

  16. MHD+ for Supra and Gen 2 B58

    go MHD or BM3. fuck ecutek, it's a headache of a platform. even "future you" can be provided with a properly dialed-in tune on MHD or BM3

  17. MHD+ for Supra and Gen 2 B58

    Ecutek doesn't have OTS maps. BM3 or MHD offer OTS maps and would be exactly what you are looking for.

  18. MHD+ for Supra and Gen 2 B58

    Damn, I've been scouring the forums for days researching which tuning software to pick. I know the correct answer will always be Ecutek because I do own a 2020 Launch Edition, so my ECU date should be 2019 or early 2020. I just personally don't think Ecutek is worth it for me because I don't...

  19. JB4 vs Femto unlock

    Virus is a harsh word. It's a voltage hack if anything. And don't forget, other BMW owners are doing the Femto route as well. It's not just Supra's. You've got G80 M3CS's, X5comp, M4comps, M2's, etc... these cars are even more expensive. If you want to open the potential to having more...

  20. JB4 vs Femto unlock

    A virus? Yeah I don't know who you're talking to but that's a poor choice of explanation/wording. JB4 can be summed up as a fancy boost controller with more settings but far less settings and customization than an unlocked ECU with MHD/BM3. A virus? No.





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