My wife's 2008 Alpine White X3 3.0d

[sash]

Great work Warren.:clapper::clapper:

 

[Gizmo]

Downpipe finished!




Smoothed off any factory imperfections.






Fitted.

 

[freerider]

Nicely done

Sent from my Nokia 6310i

 

[Yuben]

Buy why in the X3 thread:facepalm::facepalm::facepalm:

 

[Gizmo]

So far throttle response has increased, turbo lag reduced and the car pulls harder off the line, its early days but the fuel consumption looks better too, using a litre less per 100km town driving.
:coolShake:

 

[ecKARd]

For interest sake why keep that pretzel looking restriction in the downpipe? Does it serve a purpose?

 

[Kaaba]

Gizmo..im inspired, like sash said..what a great example you have set..well-done indeed and well-done to others who have set the same like Gizmo did..like it a lot

 

[Gizmo]

For interest sake why keep that pretzel looking restriction in the downpipe? Does it serve a purpose?

Its not a restriction, it is designed to stop the swirl of exhaust gasses coming out the turbo. Straight exhaust gasses flow faster out an exhaust than spinning gasses, that's why bmw fitted it in the first place.

 

[Fordkoppie]

Spiraling gas particles flow a longer path than straight.
Longer path against the pipe wall = more friction.
More friction..... You get the picture:rollsmile:

 

[Zound]

This is brilliant. Well done! And that welding is absolutely beautiful!

Got me inspired to do this to my mothers E90 320D. Will you not receive fault codes because of the post-cat oxygen sensor receiving different data?

 

[Gizmo]

Not fitted with a post cat sensor, only one pre cat sensor.

 

[FILV]

Good to see you getting know these diesels well, and sharing your adventure with us. Its cool learning with you along the way.

car is looking :clapper: