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

    Reasoning behind kicking up boost targets? It's not going to actually raise boost unless you adjust FF and duty bias to accommodate. This causes ECU_PSI to read lower and start to get messy timing. Curious if you have a log from your initial map this AM. I feel like it would make more power.
  2. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    +50 whp over MHD E40 OTS is a great accomplishment! Well done. Low end spool looks normal now too. 18+ by 3500.
  3. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    You could definitely try bumping up duty bias a little under 5k to see if you can get it a little closer to target since it is still 2-3 psi under. Also dropped DB at 5k since there was a throttle closure that pulled a little timing. duty_15 duty_20...
  4. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    Looks great. Trims better too.
  5. Re unlock dme after update?

    They're the only ones who had a Bosch insider who stole the crack for the DME ?
  6. JB4 + Bimmer Code Sport Plus + xHP thoughts?

    I'm an MT so I only check 2 of the 3 boxes. works fine! Sport plus is hardly different than regular sport individual. Maybe just a tiny bit more pedal sensitivity and response. Absolutely no difference in the Map 0 JB4 logs back to back.
  7. JB4 Maps on 93 Octane

    Yeah your boost control is fine. I would just be fine tuning your stuff at this point and watching timing since you're over 20 psi on 93. If your timing sucks, you'll lose more power than the boost is worth.
  8. JB4 Maps on 93 Octane

    Yes. You can certainly give it a try. That's what Map 4 does, just with absolute. The issue is that the stock map on the DME doesn't really kick up the boost targets (dme_BT/ecu_psi) till around 4.5-5k. So you can run into fuel limits quicker under 4.5/5k when pushing more boost. in other...
  9. JB4 Maps on 93 Octane

    Do you see that Boost2 does not show the spike at spool-to-steady state transition? right at boost threshold. should mellow out any spikes over/near target.
  10. JB4 Maps on 93 Octane

    throttle blade closing when you let off and boost building up in charge pipe for a moment its not so much a dip, rather that there's just a spike on transition from spool to steady state. DME just doesn't want to run as much boost under 4.5k. normal it may help to look at Boost 2 (post...
  11. Tried out map 4 with the jb4 on e30, here are the logs…

    yeah I have posted dyno logs of a client I helped pushing just under 450 on map 4, and almost 470 on map 5. just downpipe + jb4 + E25ish
  12. JB4 Maps on 93 Octane

    Normal. Throttle is just managing the boost as it transitions from spool to steady state.
  13. Tried out map 4 with the jb4 on e30, here are the logs…

    Yeah, it is easily another 40 hp capable with it compared to just JB4. Just don't get the one off the BMS website or it'll try to kill your car ? @Phantomx
  14. JB4 Maps on 93 Octane

    Yeah, ~20 psi is about right for good 93 octane, and to be able to have great timing. If you make any changes, make sure they're smaller adjustments at this point.
  15. Tried out map 4 with the jb4 on e30, here are the logs…

    just lower your e content to like <20 and you can still make plenty of power.
  16. Tried out map 4 with the jb4 on e30, here are the logs…

    Don't run the JB4 at all if your logs are just showing maxed out trims. Every car is different too, some are fine with a bit more ethanol - can't explain it. Your stock map, map 0 will handle that amount of ethanol fine I always recommend 2 gal to start and usually work up to 3 if logs allow.
  17. SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

    I think it'd be best to just choose more realistic boost targets so the car DME doesn't max wastegate to achieve target then immediately overboost when you hit it. not sure if true, could just be the trims going max too. try this map6_15 map6_20 map6_25 map6_30 map6_35 map6_40 map6_45 map6_50...
  18. JB4 Maps on 93 Octane

    whatever settings you ran for the first pull in that log is what you should stick with. last pulls in the log are too much boost and timing drops. turn down duty bias a little 6.5k-7k too
  19. I'm literally willing to pay for a test drive

    I bought mine without having driven an AT or MT Supra either. Not gonna lie, I was pretty turned off by the clutch on the first drive, but stuck with it and got used to it! think of it this way... if you buy and decide its not for you, you can likely get what you paid for it back.





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