Hellcat Commanded EQ Ratio goes lean at WOT

[ZincGT]

Trying to clean up a tune for a friend on his trackhawk, the vehicle has a cam and is stock otherwise. Doing a 5th gear pull on the dyno around 5200 rpm the commanded eq ratio starts going lean, I also noticed throttle tq source says transmission. any pointers?Trackhawk engine and trans tune 3.hptTUNE 3.hpl

[CaliberGuy05]

Hello, I am no Pro at tuning by any mean.

but could you just not add a bit more fuel from 5.2k rpm and up?

[ZincGT]

Its a closed loop system, I can add as much as I want but its commanding a higher a/f so the actual a/f will follow it and pull the fuel back out.

[CaliberGuy05]

Ah I see. Sorry I do not have more information.

[coanan]

NN is off.
If your not in PE, then increase VE there. if you want PE earlier, then decrease pedal voltage to go in earlier.

[SultanHassanMasTuning]

your transmission is the cause is torque source is changing

return trans to stock and friction back to stock and retest

[ZincGT]

This worked thank you. I had to find a stock file but it carries commanded eq all the way through now.

[Ayoubalawadhi]

Hey Zinc, im having the same issue can you let me know what you have done to solve it?

[DodgeBoy_8HP]

Hello,

Transmission is under control of the situation due to several potential reasons (one or multiple):
- Transmission temperature
- Torque
- Code (fault)
- ...

In the measurement file, I can see potential improvement points:
- torque converter
- shift points
- shift timing
- torque limit
- line pressure
...

In case you would like to have tuning support, please, let me know (email: [email protected])

Thanks.
Dodge Boy