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Packages starting from $5295.00. Please email to discuss your application - packages are built to order.

8.00 LBS

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For unlimited flexibility and control of your OBDII e36 m52 and s52 M3...

The BMW S52 engine (1996-1999 Single Vanos M52, S52, MS41, MS41.1 88 pin Siemens Control Systems) is an excellent powerplant and great for engine swaps as well as forced induction applications. The Emtron KV8 plug in kit allows for a install and control a robust engine management solution.  

ACE utilizes a Emtron KV8 engine control system and custom patch harness to connect the ECU to the BMW S52 factory engine harness as the base of this kit and has developed a number of solutions to ensure that all systems will operate as if being controlled by the factory engine management.  The ACE S52 ECU kit unit will come with an ACE supplied base calibration for this system. 

Please contact us before ordering to discuss your applcation.  This kit will work for NA, Turbo or Supercharged cars.  The ECU also has comprehensive E85 flex fuel capabilities (additional hardware needed)  

Package Contents

Emtron KV8 ECU & Bracket

ACE Wire Harness Adapter

2X Ignition Modules

2X Bosch LSU 4.9 Wideband Oxygen Sensors

MAP Sensor

OBD1 Hall Effect Cam Sensor

Cam Sensor wire harness adapter

Bosch Fuel Pressure/Temp sensor 

High performance Intake Air Temp sensor connection


Optional Sensor Package - Additional Cost

Bosch Oil Pressure/Temp sensor

3.5 BAR Coolant Pressure sensor


Turbo Package - additional cost

Bosch Oil Pressure/Temp sensor

3.5 BAR Coolant Pressure sensor

Continental Flex Fuel Ethanol sensor

Boost Solenoid hook up

TMAP (Charge Pressure/Temp) sensor

5 BAR Exhaust Pressure sensor


Product Description

NEW for 2019 - With recent pricing changes to Emtron ECU hardware, we have been able to totally re-configure/re-develop our S52 package to now use the larger capacity KV8 ECU with a much more comprehensive wire harness adapter at no additional cost.  Now, utilize all of the Emtron engine management features and functions without a worry of running out of inputs or outputs!  

Optional Sensor Package adds on additional inputs that can be used for engine protection, as well as transferred over network to CAN connected devices (see below)

 Turbo Package includes Optional Sensors plus “Flex Fuel” sensors, and other Turbocharger related hardware required to fully utilize all Emtron features for forced induction like charge pressure control, boost by gear, expansion ratio correction (utilizing EMAP and compression ratio to correct VE), and more.   

Enjoy full Emtron features and functionality in this fully condensed packaged system from ACE Performance.  

 “Finally a fully complete programmable motorsport electronics package for the S52.  No falsely advertised features that are not actually supported, vague feature lists, or other bait and switch ploys”


Support for nearly all factory sensors/components/outputs unlike other systems (see details below).  Instrument cluster, Check Engine Light, VANOS, Sport switch/LED, MAF, Knock control, and more. Utilizing the open and unlocked flexible Emtron platform that offers real support anywhere in the world though its world class dealer network.

 Advanced functions allow the Emtron Platform to “latch on” to actual VANOS cam position effectively closing the loop on mapping utilizing layering of fuel and ignition tables, transient config, and more.  No need to settle for questionable mixture, spark knock, and other detrimental situations when VANOS is switched on and off as compared to other solutions.

 All packages now come standard with Fuel Pressure/Temp combination sensors to better fulfill the flawless Emtron fuel model function.  This is a must have for any vehicle used for track use, as the ECU will correct for both fuel pressure and fuel temperature actively in real time!

 To better suit the Emtron speed density fuel model and mass flow functions, all packages now come with a new fast acting high performance Intake Air Temp sensor.  The stock sensor connected and can be configured for use, but the performance is slow and unreliable.

 Wire harness adapters are all constructed for expansion to use the optional “sensor package” at any time.  


  • Further utilize Emtron features and functions with additional sensors such as Oil Pressure, Oil Temp, Coolant Pressure, Flex Fuel, Exhaust Pressure, Charge Pressure, and more!  

  • Configure Engine Protection for these sensors to protect your expensive investment in hardware!

  • Transfer any of the Emtron calculated values/inputs/output status over the fully configurable CAN channels to your popular data logging, dash, or other motorsport device



 Plug in style installation


  • Install ECU, ignition modules, and Wire Harness adapter in factory ECU Location

  • Route wire harness adapter sensor harnesses into engine bay

  • Install new Bosch LSU 4.9 Oxygen Sensors

  • Swap Cam sensor for hall effect version (with wire harness adapter)

  • Reconfigure vacuum lines to factory fuel pressure regulator and install MAP sensor

  • Configure ECU for first start up (using ACE start up guide)

  • Tune engine


Customizing Installation


Nearly all factory inputs and outputs are supported and connected via ACE Wire Harness adapter.  


Due to utilizing the KV series ECU, extra inputs are now available for users to wire directly to the ECU to control extra functions such as calibration slot control, rotary trim position sensors, wire in wheel speed sensors for traction control, etc.  There is a dedicated spare 5V and Sensor Return (0V) connection for extra adding analog inputs.  


CAN BUS Support


Emtron ECU system supports two seperate CAN networks for expansion to common motorsport devices.


CAN Channel 1

This network is dedicated to Emtron expansion devices, dash loggers, and other Motorsport systems.  It is pre-configured and pre-wired to connect directly to the Emtron expansion devices like ELC2 Dual CAN Lambda Controller, Emtron EIC10 Input Expander, and more.  The connection can also further be utilized to connect to motorsport dash systems and other motorsport devices.

Termination for this bus is facilitated via an external resistor that can be unplugged and used to easily expand to other CAN devices.  


CAN Channel 2



Unsupported features


  • Tank Leakage Detection

  • Factory Oxygen Sensors (replaced with Wideband Bosch 4.9 sensors)


Quick Features


  • Dual Wideband Oxygen Sensor input with Short and Long term adaptations

  • Individual Cylinder Knock detection with Short and Long term adaptations

  • Calibration slot control (Map switching) capability

  • Advanced Fuel and Air mass modeling (MAF is also supported)

  • Optional E-throttle control (dual)

  • Engine DTC protection/limps/failsafes (pressures, temps, etc)

  • Comprehensive ECU logging (up to 500hz per channel)

  • Launch control, Motorsport Traction control (with G-force compensation)

  • Customize CAN transport and receive to expand, data log, display, etc

  • True Flex Fuel function

  • Boost Control

  • Fuel Pressure and Temperature compensation

  • All other motorsport features such as Anti-Lag, Gear Cut/Gearshift control with downshift blipping (requires DBW), Nitrous, are all included as configurable functions.


* Some features listed above are subject to additional hardware and wiring integration



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Shipping & Returns

Returns Policy
If you are not satisfied with any purchase made with Ace Performance, notify us within thirty-six (36) hours of receiving the package. Items may only be returned if they differ from what you ordered (ie. we shipped the wrong part to you) or you suspect there may be a defect with an item. Fitment issues (ie. you ordered the wrong part) are not a valid reason to return an item, and no refund requests due to fitment issues will be honored. To return an item incorrectly shipped to you, or that you believe to be defective, you must obtain a Return Merchandise Authorization Number (RMA #). The goods must be returned within ten (10) days in the same condition and in the original packaging. If the merchandise is damaged, or not in the original packaging, or no valid RMA # appears on the outside packaging, no refund will be forthcoming and you own the original purchase. The customer will be responsible for all shipping charges.

Electronic items are subject to engineering inspection prior to a refund being issued. All electronic items are carefully tested and inspected prior to sale. All items sold by Ace Performance are new unless otherwise specified.

If you believe a product you receive from Ace Performance has any defect, please contact us immediately. In the unlikely event that any issue should arise with your purchase, we are very motivated to locate and resolve the cause of the problem. If a manufacturing problem has occurred, we will investigate the part once it is returned to us, and then check with the manufacturer. If a defect is determined, the defective part will be replaced at no additional cost to you, or if you prefer, we will provide a full refund.

We ship throughout the US. Note that there are restrictions on some products, and some products cannot be shipped.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.