Dinan Unveils D-Tronics Performance Tuner for BMW 335i, 550i and M5

When tuners usually change the stock ECU map a car comes with as stock, they change the parameters at which the engine works, forcing it to produce more power and torque. However, doing something like this to your car could damage it.
D-Tronics Performance Tuner 1 photo
Photo: Dinan
Usually, the biggest changes can be obtained on turbocharged cars, due to the change in boost that can be achieved. Most ECU plug-in tuning devices send a fake signal to the on-board computer, telling it that the boost pressure is below target values, forcing it to adjust accordingly.

This modified boost pressure signal causes errors in fuel mixture and ignition timing. These errors can cause the on-board diagnostics systems to set faults, but they can also cause exceedingly high catalyst temperatures and a loss of power alongside other problems such as an exhaust gas temperature increase that, in turn, requires a slightly richer air/fuel mixture.

That’s where Dinan’s solution steps in. According to them, their new D-Tronics Performance Tuner has the capability to adjust target mixtures, correct short term trim as well as ignition timing errors induced by raising boost pressure therefore allowing engineers to optimize the parameters, as seen fit.

With this new product the emissions of the tuned car remain within legal limits too, thanks to the ability to correct short term trim corrections, keeping them within OEM specifications.

“The biggest benefit of Dinan's D-Tronics Performance Tuner is that our ECU has the capability of setting an optimum target lambda (fuel mixture) as well as correcting short term trim which is the difference between target and scheduled fuel mixture,” said Dinan Engineering President, Steve Dinan.

“By matching these two correctly we can reduce knock sensor activity which will make smoother performance, protect the catalyst, increase power and allow us to make it emissions legal,” he added.

At first, the D-Tronics unit will be available only for F30 335i, F10 550i and F10 M5 models but it will soon be ready for F12/13 650i, F01/02 750i, F12/13 M6 and F06 M6 Gran Coupe models as well.

D-Tronics is available in various stages for the 3 models supported at the moment. For the 335i, only a Stage 1 kit is available for $2,000, giving you a total of 364 HP and 375 lb-ft (508 Nm) of torque.

For the F10 550i, the D-Tronics Performance Tuner is available in Stage 1, Stage 2 and Stage 3 variants, prices ranging from $2,999 to $3,249 and $3,499 respectively. At Stage 1, you get 506 HP and 546 lb-ft (740 Nm) of torque, stage 2 goes up to 519 HP and 556 lb-ft (754 Nm) of torque while stage 3 takes the 4.4-liter V8 engine up to 539 HP and 571 lb-ft (774 Nm) of torque.

Last, but not least, the kit for the F10 M5 comes in two stages, stage 1 going up to 610 HP and 605 lb-ft (820 Nm) of torque for $3,500 while stage 2 will go take the S63 engine up to 631 HP and 622 lb-ft (843 Nm) of torque for $3,750.
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