BMW 340i ECU Remapping

BMW 140i, 340i, 440i Engine Tuning

BMW 340 ECU Remapping gives staggering results, even we are impressed.

BMW 340i Stock Figures

The 3.0l petrol engine in the 3roi has some very impressive figures out of the factory. BMW says it produces 326BHP and 450Nm torque. That’s pretty quick for a car that you can buy in an estate shape! We put the car on the dyno and carried out some stock runs so that we had a baseline to compare our stage 1 software against. We found that this car in particular was actually running 346BHP and 475Nm torque! German car manufacturers generally understate their power figures when releasing a new model so we expected a small increase like this.

We spent around 15 hours on the dyno recording in depth data logs of the engine and gearbox to get a true understanding of how its runs from factory and what is possibilities are.

BMW 340i Tuning Figures

We spent a couple of hours analysing the hundreds of maps within the ECU to make the perfect tune. After some calculated map changes and magic from our tech guys, the car is producing 424BHP and 643Nm torque! We transformed this nippy 340i to a real competitor to cars like the Golf R. The benefits don’t stop there though as the dyno graph shows;  both power and torque delivery is much smoother now making for a much better ride all the time, whether you’re driving 30 or 70mph.

BMW 340i Tuning Module Development

Some drivers don’t want a direct map to the ECU for many reasons, mainly warranty or insurance. We have developed our plug & play tuning module system to work with the BMW 340i engine, which means we no longer need to remove and disassemble the ECU.

Our tuning modules are a great way to tune your engine, which is non-intrusive and should you wish to,  is able to be returned back to stock within a matter of minutes.

Our module system uses multi channel technology to plug into multiple engine sensors allowing it to control turbo boost levels, fuelling and throttle valve control.

After some stock dyno runs we found the 340i engine produced 346BHP & 475Nm from factory, 24BHP & 25Nm over BMW’s quoted figures.

The JFA Tuning Module kit took power output to an impressive 425BHP and 560Nm Torque!

We data logged boost pressure, ignition timing and fuelling to be sure the engine was running 100% safe.

BMW 340 ECU Remapping is only a snippet doe the services we have to offer here at JF Automotive. We also have a range of other services for BWM and all makes and models.

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