Hi all,

I've almost finished a Stage 1 for my M57 swap into an E46 and before I flash it I'd like some experienced opinions. Any criticism welcome.

Hardware:

Chassis: E46 sedan (was a 320d)
Engine: M57TUD30 218hp from an X5
ECU: Bosch EDC16C31, SW 1037361842
Gearbox: original 320d 5-speed manual
Turbo: stock X5 (GT2260V)
Injectors: stock
Intercooler: oversized (upgraded)
Intake: stock
Exhaust: straight pipe (no cat, no DPF)
EGR: physically deleted
What I've modified in software:

Air / turbo

Boost target: peak 2550 mbar absolute. Stock peak was 2340 mbar.
Boost limit and SVBL: raised consistently with the new target
N75 duty: VTG opened at idle only (rest of the map stock)
Injection

Duration map (not global, by zones):
+9% at IQ 57.5–65 mg
+11% at IQ 67.5–85 mg
+9% at rail 400 bar × IQ 57.5–85 mg zone
Nm to IQ: cap col 550 Nm at 75 mg in plateau (2000–4000 RPM)
IQ Limiter / IQ LIMIT: raised consistently
Rail pressure peak: 1680 bar (stock 1600)
SOI 1–4: advance +8.8% only in the zone RPM ≥ 2000 AND IQ ≥ 50 mg (rest stock, low RPM untouched)
Lambda correction 1–4: adjusted
Torque

Driver Wish 1 and 2: adjusted
Torque Limiter 1, 2, 3, Neutral, Gear 1–8: raised so they don't cut before the desired ceiling
Rev limiter: 4600 RPM (row 4601 set to 0 in Torque Limiter Neutral)
What I have NOT touched:

Pilot SOI
Pre-glow
Idle (except the N75 geometry mentioned above)
MAP/MAF switch (kept as stock)
Fuel temp limiter
Questions:

Does this look like a reasonable Stage 1 for daily use? Normal driving, occasional spirited driving, no towing, no track.
Tiered Duration (+9% / +11% depending on IQ and rail zone) — does the idea of not applying the same % across the whole map make sense to you, or do you do it differently?
SOI +8.8% restricted to RPM ≥ 2000 × IQ ≥ 50 mg (leaving low RPM and part-load stock) — is that the right zone, or should the thresholds move?
Boost target peak 2550 mbar with stock GT2260V + oversized intercooler — is there headroom or am I already at the stock turbo ceiling?
Rail 1680 bar — should I stay here or is there safe headroom?
Anything obvious I'm missing? Either for safety or for performance left on the table.

cblash01 wrote:Hi all,

I've almost finished a Stage 1 for my M57 swap into an E46 and before I flash it I'd like some experienced opinions. Any criticism welcome.

Hardware:

Chassis: E46 sedan (was a 320d)
Engine: M57TUD30 218hp from an X5
ECU: Bosch EDC16C31, SW 1037361842
Gearbox: original 320d 5-speed manual
Turbo: stock X5 (GT2260V)
Injectors: stock
Intercooler: oversized (upgraded)
Intake: stock
Exhaust: straight pipe (no cat, no DPF)
EGR: physically deleted
What I've modified in software:

Air / turbo

Boost target: peak 2550 mbar absolute. Stock peak was 2340 mbar.
Boost limit and SVBL: raised consistently with the new target
N75 duty: VTG opened at idle only (rest of the map stock)
Injection

Duration map (not global, by zones):
+9% at IQ 57.5–65 mg
+11% at IQ 67.5–85 mg
+9% at rail 400 bar × IQ 57.5–85 mg zone
Nm to IQ: cap col 550 Nm at 75 mg in plateau (2000–4000 RPM)
IQ Limiter / IQ LIMIT: raised consistently
Rail pressure peak: 1680 bar (stock 1600)
SOI 1–4: advance +8.8% only in the zone RPM ≥ 2000 AND IQ ≥ 50 mg (rest stock, low RPM untouched)
Lambda correction 1–4: adjusted
Torque

Driver Wish 1 and 2: adjusted
Torque Limiter 1, 2, 3, Neutral, Gear 1–8: raised so they don't cut before the desired ceiling
Rev limiter: 4600 RPM (row 4601 set to 0 in Torque Limiter Neutral)
What I have NOT touched:

Pilot SOI
Pre-glow
Idle (except the N75 geometry mentioned above)
MAP/MAF switch (kept as stock)
Fuel temp limiter
Questions:

Does this look like a reasonable Stage 1 for daily use? Normal driving, occasional spirited driving, no towing, no track.
Tiered Duration (+9% / +11% depending on IQ and rail zone) — does the idea of not applying the same % across the whole map make sense to you, or do you do it differently?
SOI +8.8% restricted to RPM ≥ 2000 × IQ ≥ 50 mg (leaving low RPM and part-load stock) — is that the right zone, or should the thresholds move?
Boost target peak 2550 mbar with stock GT2260V + oversized intercooler — is there headroom or am I already at the stock turbo ceiling?
Rail 1680 bar — should I stay here or is there safe headroom?
Anything obvious I'm missing? Either for safety or for performance left on the table.

First of all it would be good to have your both stock and modified files to see what’s really going on there.
Second thing % tuning at least in my eyes is not very good thing.
Since it’s 218hp engine in many versions stock SOI maps already is extrapolated till 75mg from factory so don’t need to touch these unless you don’t like how the engine works or maybe want to increase economy. Duration map/maps should be till 100mm3 from factory (around 83-84mg) so no need to touch this either. Rail pressure also should be till 75mg from factory and again you should raise pressure if you really have not enough rail pressure or fuel. Stock GT2260V should be holding that 2550mbar quite easy,but ofc it depends on it’s health. Bigger IC is always good to drop IAT’s a bit. Anything else we would need to look at your files and check. But ofc you can flash this file and see for yourself how it goes.