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E46 Stand Alone Aftermarket Engine Management

E46 Stand Alone Aftermarket Engine Management For full race or track-only cars, an aftermarket engine management system provides enormous benefits over a stock ECU system. Modern ECU systems are not designed for racing and track use. The engineers have different goals in designing these systems compared to what a motorsports engineer would specify. Racers don't have to be concerned with emissions compliance or OBD diagnostic regulations. All a racer wants is lots of reliable power. And that's where aftermarket engine management - stand alone ECUs - come into play.

We offer stand-alone engine management systems and components from Bosch Motorsport and MoTeC and others. Turner Motorsport has been racing with stand-alone systems for over ten years and have extensive real world experience with building complete systems, existing integration, and providing individual components for upgrades. We have also partnered with Bosch to develop a plug-and-play Motorsport ECU that is integrated with factory wiring harnesses.

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E46 M3, MZ3 S54 Bosch Motorsport Stand Alone ECU System

Stand Alone Control and Direct Plug-In with Effortless Power Gains!!!

Instant Power!
(max gains over stock)

Bosch ECU swap (no other changes)+24hp+16ft-lbs

Bosch ECU with headers+56hp+34ft-lbs

Bosch ECU with headers and cams+76hp+50ft-lbs

Bosch ECU with 3.5L stroker kit
(gains over existing stroker tune)+33hp+18ft-lbs

Bosch ECU with supercharger kit
(gains over existing s/c tune)+48hp+23ft-lbs

 

Everyone at the track will agree that stand alone ECUs give the most control and the best access for tuning. The obstacle with stand alones has traditionally been the cost and time. Bosch Motorsport and Turner Motorsport have teamed up to offer an affordable, plug-and-play, and fully tunable stand alone ECU system for the E46 M3. The Bosch Motorsport ECU opens the doors for unlimited tuning potential and instant power and reliability benefits over the stock BMW MSS54 ECU. The Bosch Motorsport plug-n-play ECU cuts through all of the hassle and additional work that normally comes with switching to a stand alone management system. It also leapfrogs the factory system in advanced tuning and reliability. This is a must-have system for owners of E46 M3 race and track cars. Pound for pound the factory ECU just doesn't stack up.

The advantages of the Bosch Motorsport system are ENORMOUS:
+ immediate power and torque gains
+ all-in-one system with direct plug-in to existing wiring and dash cluster
+ full access and control over engine mapping
+ low cost compared to other engine management systems
+ no interference or limp modes like the factory ECU
+ base map file included (the Bosch ECU holds 3)
+ access to upgrade-specific map files and updates

The factory MSS54 ECU is a compromise on multiple levels. It's purpose is NOT to make large amounts of horsepower or allow access to its internal code for changes. There have been great breakthroughs in reverse engineering the stock ECU but the fact remains it was never intended to be a true race ECU. The factory ECU and oxygen sensors are there for controlling emissions and fuel economy. The emphasis is on control - it is in BMW's best interest to lock out changes to the ECU so that the car conforms to emissions and fuel economy standards. While mild tuning for the street is not a problem (such as with our Shark Injector software), the factory ECU will fight major changes every step of the way.

Our partnership with Bosch Motorsport goes back a long time. When we switched from a full stand alone to the Bosch ECU on our E46 M3 racecars we instantly made more power. When we realized there was a need for a plug-and-play alternative to the stock E46 M3 ECU the Bosch MS4.0 ECU was the first to come to mind. Stand-alone race ECU systems are ideal for making large amounts of reliable power but until now they were too expensive and too complicated. A full stand lone system will cost tens of thousands of dollars and require hours of installation and fabrication work for the sensors, wiring harnesses, communications platforms, and more. Our Bosch Motorsport system gives you all of the control of a stand-alone but works with the existing wiring and sensors in the E46 M3, including the instrument cluster and dash! This is thanks to the special translator interface box that we developed and allows the Bosch ECU to communicate with the stock VAN0S, drive-by-wire, cooling and oil systems, ABS, and more. The Bosch ECU works with the more advanced Bosch LSU4.9 wideband oxygen sensors which replace the two stock pre-cat O2 sensors. We strongly recommend that you replace your spark plugs and ignition coils with the latest BMW part numbers before installing this system. You can be up and running with the complete Bosch system in about an hour! Yes, one hour! Plug in the ECU and translator box and swap the front O2 sensors and you're done. You can revert back to stock just as easily. To get reliable power means removing interference from emissions equipment or OBD oversight and eliminate the possibility of a race-ending limp mode or fault code. The Bosch ECU system eliminates layers of complexity to give you what you really want: power and control.

Our Bosch ECU system comes pre-installed with a base engine map that closely matches your existing engine spec. We developed multiple tuning maps on our Dynapack chassis dyno using popular bolt-on S54 power upgrades: headers, intakes, cams, superchargers, etc. Straight away our base tune gained 24hp. With headers and cat delete, over 50! Our base supercharger file gained almost 50hp more than the tune that came with the kit! A 3.5L stroker engine gained over 30hp from the best file supplied by the engine builder! We provide you with a base map closely matched with your existing modifications. You then have the ability, if needed, to make adjustments to optimize the output using the Bosch PC software. Unlike the factory ECU there is no limit to the number of flashes you can make on the Bosch ECU.

Have any questions or need additional info? Give us a call or drop an e-mail. Talk it over with your shop or tuner. Or have your shop or engine builder give us a call! If they are serious about tuning then they know the limitations of the stock ECU and the advantages of a stand-alone like our system. Many race shops around the US and Europe already have extensive experience with the Bosch Motorsport equipment but our's was the first time the system has been engineered to work with a stock E46 M3 harness. Dealer inquiries invited!

Bosch Motorsport E46 M3 ECU System includes:
- Bosch Motorsport MS4.0 ECU
- E46 M3-specific Translator Box
- Bosch Motorsport LSU4.9 wideband Lambda sensors (x 2)
- Turner Motorsport base software tuning file

Optional items:
Expansion Harness - for data logging and aux port

For a lot more in-depth information on our Bosch standalone ECU system, including dyno examples of our work, click to our detailed tech page.

This item fits the following BMWs:
2001-2006 E46 BMW M3 6MT manual transmission only
2001-2002 Z3 BMW Z3 M Roadster M Coupe (S54)

Bosch
Part #: TMS180919
Price: $4989.95 (USD) 
$6994 (Sale - Save 29%)
In Stock
Turner Plug-and-Play IAT Relocation Kit

All vehicles will lose some degree of performance due to heat soak under the right operating conditions.  Engine management systems constantly monitor operating conditions and modifying parameters based on sensor inputs. BMW integrated the intake air temp sensor in the MAF housing on models such as the E39 M5, and, being sandwiched behind a hot radiator and in some applications next to an even hotter valve cover, this is less than ideal for performance applications. Absorbing excess heat from its surroundings, the MAF can’t shed it fast enough, and the ECU reads an inaccurately high intake air temperature. Compensating for this false hot air measurement, the ECU pulls timing and runs a richer fuel mixture, resulting in a significant loss of torque.

What can you do?  Locate an intake air temp sensor in a location where it can properly measure incoming air temps and where it's less prone to heat soak. Mounting the sensor further away from the heat source and isolating it from the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly.  The result is you’ll experience reduced torque loss and more consistent power output when you’re pushing your engine hard. 

The Turner engineering team was initially skeptical of the claimed performance benefits of this modification. They first set out validate the functionality and performance benefit of a temp sensor relocation. Replicating stop-and-go traffic heat soak in a 2001 540i was a simple task in a controlled environment - their dynometer. First the car was heat soaked to simulate being stuck in traffic or moving at low speeds by running the car four times on the dyno with the dyno's cooling fans disabled. The fans were then turned on for three more runs to observe the recovery rate once air flow was reintroduced. The test: following this procedure once with a stock IAT, and once with their relocation kit in place. 

The result? Turner recovered 11lb-ft torque at 2500rpm through use of their relocation kit, with even greater recovery to be found for M5 owners. Here are the heat soak-related torque losses Turner experienced:

Stock IAT location:
18rwtq at 2500rpm
10rwtq at 3000rpm
9rwtq at 3700rpm

Turner IAT Relocation:
7rwtq at 2500rpm
5rwtq at 3000rpm
5rwtq at 3700rpm

**Click here for installation instructions**

The Turner engineering team designed a complete plug and play kit (unlike all other options on the market) that makes for quick, easy, and reversible installation. Weather-sealed connectors keep out the elements, while sheathed wiring offers a clean appearance underhood. With a harness nearly 3 feet long - the Turner IAT relocation kit offers flexibility in positioning, but not too long that you're left with unsightly excess wiring. Turner recommends positioning the sensor in a location away from engine heat, but still within the intake ducting to achieve accurate intake temp readings - such as the far side of the base of the airbox. Vehicles with cold air intakes with cone-style filters can even position the sensor in the end of the filter. Simply drill a hole in your (cool) location of choice and plug in the harness. More information including installation instructions and some good examples of sensor mounting locations can be found in our DIY PDF. 

We include everything you need to relocate your IAT, just select your desired sensor brand below - Genuine BMW or original equipment Beru.

Also the perfect plug-n-play option for anyone looking to upgrade their intake to utilize an Alpha-N tune!

Note for vehicles with M62 engine: applicable to 1999 and up

Turner Motorsport
Part #: 014579TMS
Price: $131.40 (USD) 
$139.45 (Sale - Save 6%)
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