Lean Burn
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KFLBTS lambda is limited by
- LATRO - Upper limit lambda target for exhaust gas temperature control
- 018ch ecu - 0X1D11E (16BIT LOHI)
- offset: x*0.000244140625
LAMBDIAG addresses
8e0909518ak 368072: 0x72456 offset- X*0.0002441406 8e0909518al 386802: 0x72F1A 4b0906018ch 360101: 0x6654A 4b0906018dp: 0x5F8B0 b5 s4 m-box: 0x3bfb2
XIMAX
- 018ch 360101 - 0x4D0E (16bit lohi)
offset: x*0.000030517578
-TT 180hp ximax 0x16E0E
Set LATRO LAMLGMKT/LAMLGMTM high enough
BTS fueling should be able to request lambda>1
Add ignition timing for the areas you run lean:
- More advance to get lean mixtures to spark.
- Lean mixtures burn slower
E85 NOx emissions are lowest at very lean mixtures ~20:1, requiring ~50* BTDC at cruise on a 1.8T
Sources: joshuafarwel