The 2.0 Diesel N47 Engine found in most of the E Series BMWs is very tuneable, but not as bullet proof as it's 3.0 cousin, as we found out a while back.

Over the last few months we have been developing our upgrades for the N47 / N47N Engines found in the x16d / x18d Models.
These have a Solenoid Type Injector that are very small, and struggles to do much over 200bhp without excessive smoke and Exhaust Gas Temperatures (EGTs)
This Blog Post is specifically talking about the x16d / x18d N47 / N47N engines with Solenoid Injectors, but the principles of the mods are pretty similar to the other N47 Engines.

Tuning

Custom dyno tuning starts from £400 + VAT
This is a fully custom tune that's specific to your vehicle which includes road testing, logging and dyno testing with before and after printouts. We would expect ~170-180bhp (dependant on the model you start with)

For models with Automatic Gearboxes, we can also offer tuning for that. The E Series engines have a 6HP Gearbox.
Details of our services are linked below:

Intercoolers

OE Intercoolers on BMW's prove to be a limiting factor when tuning. We have several upgrades depending on your platform.

Downpipes

With the Stock Turbo, the DPF can be removed to maximise exhaust gas flow which in turn allows faster spool and lower exhaust gas temperatures. The ECU is less likely to pull power due to DPF protection.
We must advise it is illegal to remove emission control devices from vehicles permitted to drive on UK roads.
The work would be strictly performed for off road use. This means we can not accept any responsibility for the vehicle being driven on UK roads.

Swirl Flaps

The Swirl Flaps are notorious for failing, and it can be ingested by the engine causing major issues. We recommend they are removed immediately before tuning at any level.

EGR and Cooler Deletes

The EGR and Cooler can also give issues, and can be removed if the DPF is gone. If everything is healthy, we do not generally see an increase in power with these mods, but it does help with reliability as you are removing a potential failure point.

Turbochargers

If you are not going to be happy with the power from the stock Turbocharger, then you need a GTB2260V.

The GTB2260 Turbo Kit is listed below:

Fuel System

The x16d and x18d have a Solenoid Type Injector that is very small, and struggles to do much over 200bhp without excessive smoke and Exhaust Gas Temperatures (EGTs).
Changing those is the first step, but the fuel pump quickly becomes a limiting factor. A quick fix is a Metering Valve Upgrade, but realistically a larger pump is required.

Our test car was a 118d with the N47 Engine and CP4 L40 Fuel Pump, and these were the results:

GTB2260V w Stock Fuel System - 200bhp & 285Ft/Lbs
GTB2260V w Metering Valve - 209bhp & 325Ft/Lbs
GTB2260V w MV and Injectors - 253bhp & 410Ft/Lbs
GTB2260V w Injectors and Pump - 276bhp & 460Ft/Lbs

All these figures are with safe boost, low smoke and EGT levels. With the Pump, we did manage to get closer to 290bhp, but smoke and EGTs were higher than we could accept.
We are trialling another upgrade stage, but it will likely be more expensive than the current setup.
Please also bare in mind our dyno is VERY conservative compared to some of the wild figures we see in the BMW tuning world.
A graph with all the different power figures is below:

On Manual Models, an Upgraded Clutch is also recommended. We can advise the correct upgrade using the VIN as there are quite a few options.

Please see below for a video a customer vehicle we did this conversion on: