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SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

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ColonelAdama

ColonelAdama

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sorry running 93 octane.

mods are catted down pipe aftermarket intake and jb4
Try this with Map 2:
duty_15duty_20duty_25duty_30duty_35duty_40duty_45duty_50duty_55duty_60duty_65duty_70
323232323536394855576262
 

Phantomx

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Quick question for the pros. https://datazap.me/u/phantomx2k/bef-jb4map6-e40?log=0&data=1-3-4-12-14-18-19&hg=19-1-4-3-18-14-12

I got this quick ramp up at 4k that maxes trims out and i want to chill it out a bit there and smooth the hump out a bit. Would i adjust duty bias up a bit to slow the wastegate down a tick or just lower boost

Current settings in that area are

Boost Duty Bias
3.5 - 20. 41
4 - 22. 44
4.5 - 23. 47
5 - 23. 5 50

could pull 4k back .5 psi and same for 4.5k .5 psi trying make a nice linear boost ramp up the rest seems pretty good.
 
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ColonelAdama

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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_15map6_20map6_25map6_30map6_35map6_40map6_45map6_50map6_55map6_60map6_65map6_70
1415161718.52021.523.023.523.522.521.5
 

Phantomx

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ColonelAdama

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ColonelAdama

ColonelAdama

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That seemed to fix it quite nicely!
Waiting to get on the Dyno it’s 81* so we will see how it goes
https://datazap.me/u/phantomx2k/bef-jb4-e40?log=0&data=1-3-4-12-14-18-19&hg=19-1-4-3-18-14-12
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_15duty_20duty_25duty_30duty_35duty_40duty_45duty_50duty_55duty_60duty_65duty_70
38​
38​
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59​

better question for Terry is why you car isn't spooling till like 4k. Stock turbo should be able to hit 18-20 fairly easily by like 3500 and you are at 8. I can see that it is running a lot of timing to hit the load target down there, not sure why not boost instead.
 

Phantomx

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Updates made. Going on soon so we will see how it does. I’ll have Javi look at it he’s a JB4 wiz
 

Phantomx

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Midnite Tuning rollin deep in Supras!

IMG_4152.webp
 

Phantomx

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I believe a 3 course meal. Fuel for the appetizer with a main course of Boost and some Timing for dessert!
 

Bug2th

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I believe a 3 course meal. Fuel for the appetizer with a main course of Boost and some Timing for dessert!
shoot. Might have to skip the appetizer- got an in-flamed afr.
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