discussion How much smoke is too much? Tuned BMW X5 diesel

[MLorgat]

Hey guys, Wanted to get opinions from other guys on the forum who've also tuned their B57 engines and downpiped them. How much does the car smoke, and does it bother you?

I understand they run higher fuel pressures compared to the previous Gen N57 engine, and also that a richer fuel mixture is better than a leaner fuel mixture to keep temps in check, etc, but I wanted to find out if there is such a thing as a ''smokeless tune'' on these diesel engines without compromising reliability?

If the smoke is there to stay i might as well just do a stage 2 and get that 240kw and 750nm . As it is, I'm driving like an absolute animal since I did the tune and downpipe (currently about 225kw and 650nm)

And 1 more, will a stage 2 be reliable long term, or should I leave it as is? Mileage is currently at 90k KM and was just serviced with @Clint@MMS AUTO and has no issues whatsoever. Car will be religiously serviced with Clint going forward.

 

[PsyCLown]

I never did a tune when I had my diesel but I have seen people post smokeless tunes, as for how reliable they are I have not heard of anyone experiencing issues with these tunes.

As for stage 2, provided its a good tune it should be reliable long term. You've already removed the DPF, IMO should have gone for more power initially (stage 2).
I say get it tuned again for more power, service more often and enjoy the car and the extra power! Speak to the tuner about a tune with less smoke and see what they say.