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  1. JB4 vs Femto unlock

    I would also like to add that since the JB4 isn't a full-fledged tune, some customizations will be completely unavailable. You will never be able to adjust the 'burble' on JB4, tuning with BM3 gives access to higher ethanol content (more fueling control) and in-dash ethanol readout...

  2. JB4 vs Femto unlock

    How is it not detectable by the dealer if you decide to remove the tune? I thought any alteration to the ECU can be detected, even if brought back to stock. Thought I read a thread about the JB4 removing the safety parameters of the engine which was a disadvantage from a custom tune?

  3. JB4 vs Femto unlock

    Its around $400 used Not detectable by dealer when removed (to sell, for warranty work, etc) Retains factory safeties and has built in safeties of its own that revert to stock map if it sees anything dangerous up to 75-80whp gains on E30, and 100+ whp on methanol Depreciation as in JB4...

  4. Race Tracking Your Supra - Information exchange

    transf was actual transmission temp when I ran a JB4 a few years ago. Maybe it's changed in a later firmware?

  5. Race Tracking Your Supra - Information exchange

    It almost looks like it could be radiator fan duty/speed or something. Trans temp is a gradual increase through the session. Here are two BM3 logs. This also mirrors what I see when I log the straight CAN trans temp ID#

  6. Race Tracking Your Supra - Information exchange

    using whatever the autologger for jb4 is. can you share what the dataset looks like on bm3? i wonder what "transf" actually is, then.

  7. GR Supra 101: Routes to big power

    My car is running 495whp on pump fuel with a hybrid turbo, so with the right supporting mods it is certainly doable. (Femto unlock, BM3 custom tune)

  8. GR Supra 101: Routes to big power

    A dumb question: If I dont want to mess with E-blend, can I just get a bigger turbo(pure 800) + BM3(or maybe JB4 with help from Jesse?) to reach 500hp flat? If it is doable, do I still need other mods to keep up with the bigger turbo? Like charge pipe. And do you think it is worth to go with...

  9. Boost leak?/bad turbo?

    We’d need to get @bootmod support in on why ots is pulling high boost on oem. I didnt blow my turbos but after looking at the logs, I limited my boost to 23.8 I think, which is the max custom boost limiter. Def a little slower but not worth the risk

  10. A90 Supra 1/4 Mile Times

    The issue is understanding it all. Just because your adding boost and timing looks fine that doesnt mean its going to go any faster your just beating the car up and wearing parts faster. You have the car running 25 PSI and its basically running 12s at the track. This is where I probably should...

  11. A90 Supra 1/4 Mile Times

    What else makes power besides boost and timing then? Provided timing (IAT and ecu_psi "cylinder fill") stays constant as the boost increases, i see no reason for a power drop. Obviously at a certain boost level, IATs climb more quickly and drop base timing. I am pretty well read on how B58...

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

    Yea I’m actually looking to go either mhd+ or bm3 maybe in the next 2 months. So I want something that can also be used with either of those platforms. Thank you for the heads up! just waiting to see how that pure900 coming out performs!

  13. JB4 Owners (2020 ONLY)

    I'm not running JB4, but if you're looking to cut costs, you really don't need an EcuTek tune. BM3 comes with an OTS map at $595, and MHD with OTS maps is $433. The stock intake flows just fine, and would cost just as much as a bench unlock, if you happen to need one.

  14. What did you do to your Supra today?

    Glad we found the issue! Looking forward to see the dyno gains!

  15. What did you do to your Supra today?

    Fixed the boost leak I never knew I had. Explains the lower dyno #’s when I was on JB4/WMI and now BM3 OTS E50. Thanks to @zrk and @ColonelAdama for taking a look at my logs. My dumba** never transferred the seal from the oem chargepipe that attaches to the turbo. ??‍♂️ New log Old log

  16. BM3 vs JB4

    ???? stay stock save your money. Intake does nothing on the car.

  17. BM3 vs JB4

    That was well written my friend. I appreciate the detailed information without belittling me. Thank you.

  18. BM3 vs JB4

    Honestly with ACN91 fuel, you'll not be making much more power over stock either way. So if you are locked ECU, I'd just do the JB4 for a small power bump, since it'll be much cheaper. ~350-450 secondhand typically. If you have ethanol available, that will help make way more power. On a...

  19. BM3 vs JB4

    Bern77, i'm going to try to prevent you from getting absolutely flamed on here by the savages that haven't eaten in days. JB4 works on any car, it's simple and just tricks the DME into allowing more boost (amount depends on the map). There is a guy Jesse on the forums here that will do a...

  20. BM3 vs JB4

    https://www.supramkv.com/search/1623506/?q=BM3+Jb4&o=date





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