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  1. Ecutek tune causing OBDII emissions to fail

    This is ? why I am JB4, because if Komiefornia. Exhaust, while maintaining the CAT, can sometimes get a way with, anything else. Nope.

  2. I need your help.

    Looks like: Exhaust intake Charge Pipe Verus cosmetic caps Stock cut cover Poorly fitting spoiler Steering wheel As for the tuning...you won't know until you check the DME with the MHD app or the like. You can pull the DME out and check the date. If it's a pre 6/20, It's very likely it was...

  3. A91 manual transmission limits

    Really impressive list! What turbo do you have? Do you have the CM hydraulic release bearing or did you get another stock one? Also, what probs do you have in 1st? Thanks!

  4. A91 manual transmission limits

    I'm at 700whp on the FX1000 for about 3000 miles now with no issues other than a defect in my initial hydraulic release bearing. I don't launch the car but I do push it and it takes it no problem. Only gripe I have with the clutch is engagement in first gear which can be annoying. Here's a...

  5. Is it bad to run a downpipe without a tune?

    Here is what the data looks like from a 20 minute session at gingerman with a catless downpipe and exhaust running map 0 on a JB4 (fully disabled, just for logging purposes). I've filtered datapoints where pedal is less than 90% of WOT. It's fine.

  6. FS: 2021 A91 Refraction Blue - 18,700 Miles - $55,999

    A91 edition with 19,xxx miles, ~$11,000 in mods Mobile-1 5w-30 full synthetic and OEM filter changed every 3,000 miles, last change ~25 miles ago - July 2024. Paint corrected and 3 coats of Cquartz (12/2022) Castrol SRF Racing Brake Fluid (11/2023) Appearance: Carbon hood vents 15mm/13mm...

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

    Highly recommend 2-3 gal of E85 into a full tank 91 if you have it available. No flex fuel kit needed. Stick with Map 1 and make these changes: duty bias: duty_15 duty_20 duty_25 duty_30 duty_35 duty_40 duty_45 duty_50 duty_55 duty_60 duty_65...

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

    Hey guys im new to all the JB4 stuff some feedback for a custom map 6 would be great im in cali and can only run 91 octane and dont have a flex fuel kit yet my current setup consists of Mishimoto Chargepipe MST Intake With dinan turbo inlet Catless downpipe AWE resonated exhaust heres my datalog...

  9. Big puffs of smoke when coming to a stop

    My simplistic non mechanic opinion: I’d get her checked for leaks for sure. Blue smoke definitely can be indicative of an oil leak. https://www.autozone.com/diy/exhaust/smoke-from-exhaust (there’s plenty more detailed links you can find but I prefer simple) Ask an independent BMW shop about...

  10. Big puffs of smoke when coming to a stop

    I currently have a 2021 supra that has a catless downpipe, exhaust, intake and is custom tuned on jb4. I noticed at 17k miles I am not able to measure my oil and recently the car at 27k miles it started to noticeably smoke a lot when the car is fully warmed up and is coming to a stop. Blue smoke...

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

    when you switch back to OEM operation, you need to shut down the car to get it to save for whatever reason. I physically got out of the car and locked it to make sure it would stick. Disabled the BC button operation in the jb4 menu after I figured that out.

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

    Has anyone figured out how to NOT control the exhaust flap with the JB4? I noticed when switching back to the OEM exhaust it would NOT open in sport unless I did the trick shown in the video above. Would prefer the sport mode button to dictate open/close.

  13. Kenji 2.0 DPs Are Back For One Last Run

    Did you need the EWG connection for the JB4 for Jesse to tune?

  14. Kenji 2.0 DPs Are Back For One Last Run

    Also ran just Jb4 and DP with stock exhaust which made it much louder than stock and had pops. I think I had the resonator removed also before going with RK setup. The RK and catless DP is loud so be ready if you go that route or catless DP and aftermarket exhaust. Etc. QUOTE="faShow, post...

  15. Kenji 2.0 DPs Are Back For One Last Run

    That's stock numbers. Something ain't right.

  16. Kenji 2.0 DPs Are Back For One Last Run

    I had Jesse D do a E30 map and a 93 map for me on the Jb4. He smooths out boost spikes and I run a 4.16 0-60 & a 8.18 1/8 time on Nittos (E30 map). Mods: JB4, Armaspeed CAI, Kenji race DP, RK Sig exhaust and an aftermarket Charge pipe.

  17. Sold: 2021 Toyota Supra 3.0 Premium w/extras - only 6,000 miles - $50,000 for quick sale (Phila, PA)

    Can't believe I'm parting ways with this car, but I have a 718 Cayman GTS allocation arriving in July. Vehicle is in Montgomeryville, PA (Philly suburbs). Asking $50,000 with all stock and aftermarket parts. 2021 Toyota Supra 3.0 Premium (ZERO oil consumption issues) Tungsten Silver with...

  18. Sold: FS: 2021 3.0 Premium Turbulence Grey 14k Miles $52K (San Antonio, TX)

    This car has been an absolute blast and I will be sad to see it go. I am the second owner of this vehicle. I purchased it December 2022 with 4k miles on it. It was bone stock at this point. It currently just passed 14k miles and will go up ever so slightly as I drive it to the office once a...

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

    Try these new duty biases to clean up throttle activity a bit Good starting point for high flow DPs duty_15 duty_20 duty_25 duty_30 duty_35 duty_40 duty_45 duty_50 duty_55 duty_60 duty_65 duty_70 32 32 32 32 35 36 39 48 55 57 62 62

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

    If someone would please provide some feedback on my log, I'd greatly appreciate it. https://datazap.me/u/jb4/map5-test-1 The second half is a pull with VSC turned off. For some reason, JB4 app concatenated the two logs. This is with: ActiveAutowerke high flow catted downpipe Tomei Expreme...





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