Joined
·
15,633 Posts
Just an FYI, "GoatRope Garage" on youtube has some great Gen IV tuning stuff. I referenced him a lot in my tuning. I figure that after commenting in some other threads, I would post my general tuning approach here for TFNGs to consider:
------------------------- STEP 1: ----------------------------
MAF-Only Tuning: save as temporary file.
** Try to avoid sharp throttle changes for MAF only tuning, so readings are more accurate.
Temporarily disable VVE/SD via the following:
* Airflow / Dynamic: Dynamic Airflow - disable (set disable to 100 RPM, re-enable to 90 RPM).
Temporarily disable Closed Loop:
Setup histogram for MAF in Hz and EQ ratio.
1st Parameter, EQ error (Math)
2nd Parameter, MAF for column axis in Frequency
Make sure to copy column axis values from ECM Tuner MAF output frequency
** You may need to create two histograms for Low and High frequency MAF tables **
Once histogram populated, copy/paste "special" as percent change to ECM Tuner tables. Repeat data logs if desired, then copy / paste MAF frequency tables to original tune file.
------------------------- STEP 2: ----------------------------
VVE(speed density) Tuning: save as temporary file.
The goal is non-PE "stoich" tuning. Consider raising PE minimums, and driving in variable conditions in EACH gear to hit more load cells.
Temporarily disable MAF via the following:
* Engine Diagnostics / Airflow - MAF freq Fail (Fail High 2 Hz, Fail Low 1 hz)
* Set P0103 to fail on 1st error.
Temporarily disable Closed Loop:
Setup histogram for EQ ratio and MAP.
1st Parameter, EQ Ratio
2nd Parameter, Engine RPM for column axis,
3rd Parameter, Manifold Absolute Pressure for row axis.
Make sure to copy column/row axis values from ECM Tuner VVE tables to match.
Once histogram populated, copy/paste "special" as percent change to ECM Tuner VVE tables - all four should match. Smooth out boundaries if needed. Repeat data logs if desired, then reset Closed Loop, DFCO and MAF enable settings equal to original tune file.
Use 2013 Camaro LZ1 Zone boundaries for VVE: VVE zone question, found nothing definitive on a search.
------------------------- STEP 1: ----------------------------
MAF-Only Tuning: save as temporary file.
** Try to avoid sharp throttle changes for MAF only tuning, so readings are more accurate.
Temporarily disable VVE/SD via the following:
* Airflow / Dynamic: Dynamic Airflow - disable (set disable to 100 RPM, re-enable to 90 RPM).
Temporarily disable Closed Loop:
- Fuel / Oxygen Sensors - O2 readiness ECT: disable closed loop (set to 400* F).
- Fuel / Oxygen Sensors - LTFT (Min ECT 400* F, Max ECT 10* F).
- Fuel / Temperature Control - Catalyst Protection (COT disabled).
- Fuel / Cutoff, DFCO - Clutch Fuel Cutoff (disable to 300 MPH, 8000 RPM).
- Fuel / Cutoff, DFCO - Deceleration Fuel Cutoff (enable 400* F, disable 399* F)
- Fuel / Lean/Fuel-Saving - DoD disable.
Setup histogram for MAF in Hz and EQ ratio.
1st Parameter, EQ error (Math)
2nd Parameter, MAF for column axis in Frequency
Make sure to copy column axis values from ECM Tuner MAF output frequency
** You may need to create two histograms for Low and High frequency MAF tables **
Once histogram populated, copy/paste "special" as percent change to ECM Tuner tables. Repeat data logs if desired, then copy / paste MAF frequency tables to original tune file.
------------------------- STEP 2: ----------------------------
VVE(speed density) Tuning: save as temporary file.
The goal is non-PE "stoich" tuning. Consider raising PE minimums, and driving in variable conditions in EACH gear to hit more load cells.
Temporarily disable MAF via the following:
* Engine Diagnostics / Airflow - MAF freq Fail (Fail High 2 Hz, Fail Low 1 hz)
* Set P0103 to fail on 1st error.
Temporarily disable Closed Loop:
- Fuel / Oxygen Sensors - O2 readiness ECT (set to 400* F).
- Fuel / Oxygen Sensors - LTFT (Min ECT 400* F, Max ECT 10* F).
- Fuel / Temperature Control - Catalyst Protection (COT disabled).
- Fuel / Cutoff, DFCO - Clutch Fuel Cutoff (disable to 300 MPH, 8000 RPM).
- Fuel / Cutoff, DFCO - Deceleration Fuel Cutoff (enable 400* F, disable 399* F)
- Fuel / Lean/Fuel-Saving - DoD disable.
Setup histogram for EQ ratio and MAP.
1st Parameter, EQ Ratio
2nd Parameter, Engine RPM for column axis,
3rd Parameter, Manifold Absolute Pressure for row axis.
Make sure to copy column/row axis values from ECM Tuner VVE tables to match.
Once histogram populated, copy/paste "special" as percent change to ECM Tuner VVE tables - all four should match. Smooth out boundaries if needed. Repeat data logs if desired, then reset Closed Loop, DFCO and MAF enable settings equal to original tune file.
Use 2013 Camaro LZ1 Zone boundaries for VVE: VVE zone question, found nothing definitive on a search.