96–99 E36 323i/328i/M3 M52/S52 MS41 CUSTOM N/A TUNE (S1/S2/S3)

BMW E36 323i, 328i, and M3 (1996–1999) custom MS41/MS41.1 ECU tuning by Poverty Built. Our Stage 1, Stage 1+, Stage 2 (headers & intake), and Stage 3 (cams/manifolds) calibrations deliver OEM‑smooth drivability, sharper throttle response, and proven naturally aspirated gains on the M52/S52. Expect cleaner diagnostics (SAP/post‑cat O2 DTC handling) with optional EWS delete, conservative data‑driven mapping, and support for everything from daily drivers to track builds.

Fits:

• 1996–1999 BMW E36 323i / 323is / 323iC — M52B25, MS41

• 1996–1999 BMW E36 328i / 328is / 328iC — M52B28, MS41

• 1996–1999 BMW E36 M3 — S52B32, MS41.2

What Poverty Built does for this platform:
Poverty Built focuses on smooth drivability and real, conservative gains. For the M52/S52 + MS41/MS41.2 we calibrate:

• Fueling (lambda targets) and ignition timing across part‑load and full‑load maps

• VANOS set‑points for intake cam advance vs. RPM/load

• Load/air model and torque arbitration to keep the strategy coherent

• Idle, fan temp, rev limiter, and (optional) top‑speed limiter (Vmax)

• MAF/injector characterization when you change hardware (e.g., larger HFM or injectors)

• Diagnostics alignment so the ECU’s plausibility checks match your hardware

STAGES, GAINS & PRICING

(Gains depend on health, fuel, altitude, hardware; we quote conservative deltas.)

STAGE 1 — OEM+ Performance

• Description: OEM+ performance with improved throttle response and deleted DTCs for common emissions systems (SAP, post‑cat O2), and complementary EWS delete.

• Price: $99

STAGE 1+ — Sharper Behavior & Deletes

• Description: Adds EGR/SAP deletes and sharper throttle behavior. Optional mild burbles.

• Price: $139

STAGE 2 — Headers & Intake Optimized

• Description: Built for cars with headers and intakes (though not necessary). Optimized VANOS, throttle maps, and full emissions system support.

• Price: $159

STAGE 3 — Fully Customized

• Description: Fully customized tune for maximum performance and flexibility. Supports ICV delete, custom manifolds, aggressive behavior.

• Price: $180

WHAT YOU GET

• OEM manners, quicker response, stronger midrange without weird surging

• Cam/VANOS‑aware tuning for a broad torque curve

• (Stage 3 only) Log‑driven revisions until it’s dialed (we’ll ask for RPM, load, lambda, ignition, IAT/CLT, etc.)

RECOMMENDED SUPPORTING MODS

• Stage 1: Fresh filters/plugs, tight vacuum system, healthy O2s/MAF, good fuel.

• Stage 2: Intake and freer exhaust, M50 manifold optional, quality coils/plugs, strong cooling.

• Stage 3: Cams + M50 manifold + headers, high‑flow exhaust, upgraded cooling, wideband recommended for data.

HOW ORDERING WORKS

1. Choose S1 / S2 / S3 and list your hardware in order notes.

2. Provide your MS41 read.

3. Flash with your preferred tool (simple step‑through available).

4. Send logs → we iterate to finalize.

LEGAL & OFF‑ROAD USE

Any calibration that affects emissions equipment (e.g., secondary air injection, catalytic monitor readiness, rear O2 reporting) is for closed‑course competition/off‑road use only. You are responsible for knowing and following local laws.

POVERTY BUILT DISCLAIMER

By purchasing this product, you agree that Poverty Built LLC is not liable for any damages including, but not limited to: engine failure, drivetrain damage, emissions violations, incomplete tuning results, or any indirect, incidental, or consequential damages arising from tuning services. All tuning is intended for off-road or motorsport use only and is not certified for use on public highways or as a method of emissions defeat. You also agree to our posted refund policy, and acknowledge that tuning results may vary depending on vehicle condition, modifications, and installation quality. It is your responsibility to ensure your vehicle is mechanically sound and properly maintained before and after any tuning service.