[Works]

Since this information is pretty much impossible to find, I'm sharing my experiences and results. I decided quite early on that I'd like to optimize the power output of my diesel station wagon and set on a journey to find out who could do it and what I could gain. After months of searching, I finally settled on a tuner that had good experience from the newer N57 engine and decent pricing. The software/maps were custom built for my car here in Finland.

The car is a 2009 E91 LCI 330dA with the newer N57 engine, a configuration that rarely gets discussed in here. I guess the E9x/N57 combo is not on sale in NA. Upgrade wise, the only change that has been done to my car is a drop-in panel filter from Pipercross, otherwise it is bone stock with DPF still on.

In stock form the car achieved 245hp/566Nm or 183kW/417lbft.

Once completed, the car produced 308hp/651Nm or 230kW/480lbft.

Dyno charts below. If you have any questions, shoot away. Yes, it is a sweet, sweet upgrade.

Stock


Tuned

[Yozh]

Nice results for a stock car with the DPF still in place. Enjoy.

[TorqueAddict]

Excellent results with DPF still on. Make sure you monitor your EGT'S!

[325d]

Originally Posted by TorqueAddict

Make sure you monitor your EGT'S!

Ok... But what EGT is critical? What EGT is ok and what is to much?
I tried searching for this, but can not find a good answer.

[TorqueAddict]

Originally Posted by 325d

Ok... But what EGT is critical? What EGT is ok and what is to much?
I tried searching for this, but can not find a good answer.

I see in your signature, that you drive a 325D. Due to power difference in between the engines, i cannot comment what would be the EGT ranges in your car. With my 335D, with DPF on, during regens, it used to vary in between 680-730C. otherwise, it used to stay in between high 200C to high 300C.