BMW 335i E90 N55 - Stage 3

This N55-powered E90 was fitted with a high-performance hardware package but remained on a stock calibration — resulting in suboptimal fueling, overboosting, and inconsistent drivability.

After a complete custom ECU calibration, the car now produces 237 kW and 568 Nm, with power currently limited by the cooling capacity of the intercooler. The calibration was tailored for safe operation under increased airflow demands, ensuring consistent torque delivery and stable boost control.

Hardware List:

PureTurbos Stage 1 (Borg Warner core, upgraded front housing – rated 450+ HP)

Burger Motorsports Cold Air Intake

VRSF Catless Downpipe

VRSF Hi-Flow Turbo Inlet & Full Catback Exhaust

CSF High-Performance Intercooler

GFB DV+ Diverter Valve Upgrade

FTP Boost Pipe

Upgraded Solid Charge Pipe

The N55’s factory ECU was recalibrated to integrate all airflow and boost modifications while maintaining OEM-level drivability and torque management.

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