AEM Infinity Supported Applications BMW 1995 E36 M3 User Manual

Instruction

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Manual

Infinity Supported Application

1995 BMW E36 M3 (US Spec)

WARNING: This installation is not for the tuning novice! Use this system with EXTREME caution! The AEM
Infinity Programmable EMS allows for total flexibility in engine tuning. Misuse or improper tuning of this
product can destroy your engine! If you are not well versed in engine dynamics and the tuning of engine
management systems DO NOT attempt the installation. Refer the installation to an AEM-trained tuning
shop or call 800-423-0046 for technical assistance.

NOTE: All supplied AEM calibrations, Wizards and other tuning information are offered as potential
starting points only. IT IS THE RESPONSIBILITY OF THE ENGINE TUNER TO ULTIMATELY CONFIRM IF
THE CALIBRATION IS SAFE FOR ITS INTENDED USE. AEM holds no responsibility for any engine damage
that results from the misuse or mistuning of this product!

AEM Performance Electronics, 2205 126th Street Unit A, Hawthorne, CA 90250

AEM Performance Electronics

Phone: [phone] Fax: [phone]

http://www.aemelectronics.com

Instruction Part Number:

Document Build 11/5/2014

BMW 1995 E36 M3 Supported Application2

OVERVIEW

The AEM Infinity EMS can be adapted to most fuel injected engines. When possible, AEM will provide “base cal”
sessions and configuration files for supported applications that have been verified by AEM engineers. These
session and configuration files are starting points only and will need to be modified for your specific application.
This manual lists the files available and suggested changes for your engine. It also includes a pinout with
suggestions for adapting the Infinity ECU to your engine harness. It is the responsibility of the installer to verify this
information before starting the engine.

MODELS

BMW

1995 E36 M3 (US spec) with S50usB30 engine
1992–1995 E36 325I/IS/IC with M50tuB25 engine

DOWNLOADABLE FILES

Files can be downloaded from www.aeminfinity.com. An experienced tuner must be available to configure and
manipulate the data before driving can commence. The Quick Start Guide and Full Manual describe the steps for
logging in and registering at www.aeminfinity.com. These documents are available for download in the Support
section of the AEM Electronics website: http://www.aemelectronics.com/products/support/instructions.

ADAPTER HARNESS OPTIONS

30-3701 Plug & Pin Kit

This kit includes mating connectors and terminals for the Infinity. It also includes a main relay kit which is
necessary for proper power distribution. This kit is best suited for experienced installers who want to build their
own harness.

30-3702 Mini Harness with Flying Leads

This harness includes a fused power distribution center with main relay. Pre-terminated connectors are available
for the internal UEGO sensors and AEMNet. A bag of multi-color flying leads is included to simplify custom
harness builds.

30-3703 Mini Harness with Pins

This harness includes a fused power distribution center with main relay. Pre-terminated connectors are available
for the internal UEGO sensors and AEMNet. 100 pins and 30 sealing plugs are included.

30-3600 O2 Sensor Extension Harness

Extension harness to connect AEM UEGO Wideband O2 sensor to 6-pin Deutsch DTM in Infinity Mini Harnesses
(30-3702/3703).

30-3601 IP67 Comms Cable

USB Mini-B comms cable; 39” long with right angled connector and bayonet style lock.

30-3602 IP67 Logging Cable

USB A-to-A extension cable: 39” long with right angled connector and bayonet style lock.

© 2014 AEM Performance Electronics

IMPORTANT APPLICATION NOTES

3

IMPORTANT APPLICATION NOTES

The test vehicle used for development of this app was an E36 318 sedan with a full S50usB30 swap from a US
spec 1995 E36 M3. The S50usB30 engine is different from the Euro spec M3 engine in that is does NOT have
ITBs or dual continuously variable VANOS. The S50usB30 engine has a large plenum style intake manifold with a
single throttle body and on/off style VANOS on only the intake cam. The S50usB30 engine appears to be nearly
identical to the standard M50tuB25 engine with the only discerning difference being the engine’s displacement
(3.0L versus 2.5L). Both engines from the models listed above use Bosch DME part number 0 261 200 413.
Operation of the Infinity EMS was not verified on the M50tuB25, however, because both engines use the same
DME, both have the same wiring harness pin out and use the same injectors and cam/crank/CLT/IAT sensors.

The injectors used for testing were stock “green top” Bosch injectors (part number 0 280 150 415). These injectors
are undersized for the application and are marginal in providing enough fuel flow (156cc/min @ 50psi) to support
the stock horsepower level. The stock DME runs a high load WOT AFR of 12.8:1. While creating the Infinity base
session, targeting a slightly richer AFR of 12.4:1 resulted in hitting the Primary Injector Duty Limit (Plug­ins>Wizards>Setup Wizard>Diagnostics) value of 95%. It is highly recommended that replacing the stock
injectors with higher flowing injectors be made a priority in order to support any kind of performance modifications
made to the engine.

The S50usB30 engine uses a Bosch 3-pin PWM idle air control (IAC) valve. The 3-pin IAC is driven by a standard
PWM signal as well as an inverted complementary PWM signal. An external circuit is required to invert the normal
PWM output signal as the Infinity is not outfitted with hardware to support this function. A schematic to build this
device is provided in this manual.

The E36 M3 uses a Mass Air Flow (MAF) based injection control strategy in stock form. The base sessions and
configuration files provided are set up for Speed Density using an AEM 3.5Bar MAP sensor (PN 30-2130-50). The
stock MAF sensor is not supported in the provided configuration files. The stock CLT & IAT sensors have been
fully characterized and their calibrations have been inputted into the base session.

The adapter harness used to mate the Infinity EMS to the stock wiring harness was set up to use the stock main
relay that is already on the vehicle. The stock coolant temp gauge is not supported by the Infinity.

© 2014 AEM Performance Electronics

BMW 1995 E36 M3 Supported Application4

PWM IDLE INVERT

Use the following schematic to create a PWM idle invert circuit. This circuit will need to be wired into the Infinity
adapter harness.

GETTING STARTED

Refer to the 10-7100 for EMS 30-7100 Infinity Quick Start Guide for additional information on getting the engine
started with the Infinity EMS.

Import Base Session

E36 BMW M3 base session located in C:\Documents\AEM\Infinity Tuner\Sessions\Base Sessions

© 2014 AEM Performance Electronics

GETTING STARTED

5

IMPORTANT APPLICATION SPECIFIC SETTINGS

Infinity Tuner Wizard Setup

Engine

In the Wizard Engine tab confirm the following settings:

Engine Displacement (L)= 3.00
Number of Cylinders = 6
Engine Cycle Type = 4 Stroke
Ignition Type = Sequential (Coil On Plug)
Firing Order = 1-5-3-6-2-4

Ignition Sync

Add a text grid control to your layout and select the following channels. Once the channels have been added, right
click and set them to Initial Value. Make sure their values match the settings below for initial timing sync.

TrigOffset [degBTDC] = 5.5
CamSyncAdjustment = 65

See QuickStart Guide section Setup: Ignition Sync for instructions on timing sync.

Cam/Crank

In the Wizard Cam/Crank tab confirm the following setting:

Universal 60-2 Mag Crank & 1 Hall Cam

Injector Setup

In the Wizard Injector Setup tab confirm the following setting:
Number of Injectors = 6

Low Side Assignment – Malfunction Indicator Lamp

In the Wizard LowSide Assignment tab confirm the following settings:

LS2 Setup:

Frequency = 30 Hz
LS2_Duty X-Axis = Engine Speed [RPM]
LS2_Duty Y-Axis = MILOutput

© 2014 AEM Performance Electronics