ColonelAdama
Well-Known Member
- First Name
- Adam
- Joined
- Jan 30, 2023
- Threads
- 2
- Messages
- 667
- Reaction score
- 812
- Location
- Greenville, SC
- Car(s)
- 2023 Absolute Zero Supra 3.0 Premium MT, 2015 GTI
- Thread starter
- #196
Here's a tip for MT cars:
Key is to keep ECU_PSI under DME_BT by 2-3 psi. Sometimes you may see an unexplained dip in DME_BT. This indicates that the FF curve is too high at the given RPM before the DME_BT dip.
In this case, I dropped duty bias at 4500 by 2, and dropped duty bias at 5000 by 1.
MT cars HATE cylinder-overfill. Any higher boost than was expected is going to make the car unhappy and drop boost targets. This part is really what makes tuning them so tricky.
Changing the JB4 boost targets also alters the FF curve, so it is best to just go additive mode and stick with the same targets and FF-value. That leaves just duty bias as a variable to adjust and smooth things out.
Duty bias used here are similar to any other catless Supra, however FF is set to 12. Everything else is standard settings on the MT firmware.
Key is to keep ECU_PSI under DME_BT by 2-3 psi. Sometimes you may see an unexplained dip in DME_BT. This indicates that the FF curve is too high at the given RPM before the DME_BT dip.
In this case, I dropped duty bias at 4500 by 2, and dropped duty bias at 5000 by 1.
MT cars HATE cylinder-overfill. Any higher boost than was expected is going to make the car unhappy and drop boost targets. This part is really what makes tuning them so tricky.
Changing the JB4 boost targets also alters the FF curve, so it is best to just go additive mode and stick with the same targets and FF-value. That leaves just duty bias as a variable to adjust and smooth things out.
Duty bias used here are similar to any other catless Supra, however FF is set to 12. Everything else is standard settings on the MT firmware.
Sponsored
Last edited: