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The BMW e36 Link is a direct plug in replacement of the factory BMW ecu. The factory ECU case is used to cover the Link board. A small modification to the case is needed to allow for a vacuum line to connect to the internal Link ecu features an on-board 4.0 MAP sensor. With the Link BMW e36 OBDI M50/S50 plug in standalone engine management "chip tunes" are a thing of the past. This engine management system allows for tremendous flexibility and can handle any custom engine set up from NA to turbo / supercharged combinations this plug in unit is up to the task. The BMW e36 Link works excellent with E30 swaps where an M50/S50 wiring harness is used. The package will also work with other standard (M52 / S52) and custom displacement engines as long as the M50 / S50 harness is used and the car is converted to OBD1 configuration. This ECU will also work with manual transmission M50 vanos E34 5 series BMWs Please contact us directly to discuss your configuration and have ACE Performance design a custom package. Engine Configurations Engine configurations are pre-set into plug-in ECU's with a "start" base map. Additional performance maps and tuning support can be provided by ACE Performance at an additional cost. ACE Calibration File: - *For advanced set up and configuration please consider adding the ACE Performance calibration file* ACE BMW e36 G4+ PNP - Calibration file Limits Engine Temperature Dependent Soft and Hard RPM Limit Engine Temperature Dependent Soft and Hard Boost Limit Vehicle Speed Limit System Voltage Limit User Configurable RPM Limit based on external input Fueling Adjustments Up to 440 Zone Fuel Table with configurable load and RPM centres. Configurable X and Y Axis Parameters Multiple Fuel Tables Up to 6D Fuel Mapping Injection Rate Master Enrichment Pre Crank Prime Crank Enrichment Post Start Enrichment Warm Up Enrichment Acceleration Enrichment IAT Fuel Correction Injector Deadtime Compensation Overrun Fuel Cut Idle Load Trims Fuel Tempera