ECU Remapping and DPF Removal - BMW 330D M-Sport E90 Auto
Why remap the BMW 330D ?
We get to sit in many passengers seats to see how the customer's car goes after the ECU remap. Some cars have that "pushed into the seat" feeling that lasts. The BMW 330D is one that does not dissapoint.
Before the remap power is at 231 bhp...
So yes 231bhp is a fair bit of power and 500NM of torque can pull you along OK. However as with most factory programmed turbo diesels the throttle is not as keen as one would like and the spread of power just a little thin.
So how did we tackle this beast? Well to remap the BMW 330D we simply read the original software via the OBD socket. Then after a couple of hours studying and adjusting many maps we reload the software, known as the remap.
The beauty of making our own custom remaps is that we know exactly what is going in and we can adjust to suit different requirements.
Our highly engineered dyno tested stage one remap massively boosts power to 280bhp with 620Nm of torque with a throttle that responds when you press it. Power is delivered super smooth with the power band widened to match. The way the speed flies up on the speedo compared to standard is frightening.
The Stage 1 is designed to work with the DPF and CAT in place.
Next the brakes and the wheels...
Well the wheels had slight damage from kurbing and also had suffered a poor refurb by a past owner so we booked in for refurbishment.
For our 18" wheels including a metallic finish each one costs just £60 including all the tyre fitting work. The transformation of the wheels is nothing short of breath-taking - much better than we ever imagined - and all in a single day - amazing.
The brakes are pretty big as standard so we chose to just replace for new items as the original ones had too much rust visible for our liking. The non braking surfaces were all painted in VHT aluminium paint so they stay looking new and pretty. The calipers were cleaned and painted in silver engine lacquer.
DPF removal now completed ...
Well we removed the DPF from the BMW 330d - not because this one failed - but it is our long term DPF removal test car. Two years into the test and the car is still perfect and pulls even stronger. Two MOT tests passed without issue.
DPF removal required opening of part of the exhaust to extract the DPF block then reprogramming of the ECU again to removal all the DPF regeneration cycles and other DPF functions. So if you are having DPF problems perhaps removal is a better option than the expensive dealer replacements.
With the DPF removed we install Stage 2 software that takes power just past the 300BHP mark with a staggering 710Nm torque for our Auto models. Manuals have the torque reduced slightly to try and prevent rumbling occuring which is common in the manual versions.
With the DPF removed and our custom Stage 2 software installed both the driveability and acceleration are unreal.
As with all of our development cars, we are constantly researching new ways of improving all elements of our software. Many hours on the dyno with our 330D has led us to allow for the following features to be enabled on the BMW diesels:
-Stage 1, Race, Economy and completely custom remaps with Dyno before and after print outs
-Speed limiter removal
We are still tempted to order the hybrid turbo ..... watch this space!
For the next project car we will be working on the B7 Audi RS4 4.2 V8 FSI, not only will we be offering our Stage 1 and Stage 2 remaps for this vehicle, but also some great added features.