[Cafe.Racer]

This is a PDF graph from Steinbauer:

http://www.steinbauer.cc/pdf/0STEINB...2_BMW_320d.pdf

Looks very similar don't you think?

I've not got round to fitting it because it needs to be connected to the accelerator pedal, but I had a good long look the other night and have run a wire off it. Hopefully got the right wire - Pin 6 White/Yellow. Didn't think to run power as well while I was under the dash. Anyone know a good 12v (ign) source on the driver's side of the engine bay?

Edit: Since found out Pin 6 (White/Yellow Wire) is the wrong one, it's definitely the White Wire)

[AK]

Originally Posted by 330cdsport

Just found this graph on the Tuning box site for the 163bhp 2.0d engine.

"Original kW" is 129.1 for the 163 2.0d? And 390.4 Nm? Not quite right is it?

[NFS]

Originally Posted by Insider

Actually the above statement is totally wrong. Diesel's are the high-boost engines, petrol low-boost. The 335i has max boost of 8.5 psi, the 335D has max boost of 26psi. Diesel's work off heat, and need high compression and high turbo boost to generate lots of heat, this is how the fuel is ignited. The petrol relies on a spark plug so does not need the heat (would cause detonation, not a problem with diesel). Diesel fuel is very slow burning, so diesels by nature can't rev very high, thus their high torque, low horsepower character.

This is right. Diesels have much higher compression ratios than petrol engines

http://auto.howstuffworks.com/diesel.htm

They need to run with higher compression ratios to generate sensible amounts of power. This means that they tend to be somewhat heavier and more robust than petrol engines.

One of the reasons why the 335i engine is all new is that the 330i engine was not really robust enough for turbo charging because of it's exceptionally lightweight alloy construction

http://en.wikipedia.org/wiki/List_of_BMW_engines

The 335i's engine is more similar to the e46 330i engine.

http://en.wikipedia.org/wiki/BMW_N54

Because of their inherent robustness diesel engines are generally easier to turbocharge than petrol ones.

The latest most competetive diesels are very highly turbo-charged, which is why turbo lag becomes a problem and why the sequential set up in the 335d and 535d is so damn good.

By contrast the turbo charging of the 335i is much more delicate. The turbos are relatively low power and by using 2 small ones turbo lag becomes a non issue.

[330cdsport]

Originally Posted by AK

"Original kW" is 129.1 for the 163 2.0d? And 390.4 Nm? Not quite right is it?

Yep the torque does seem far too high for standard tune.