Hello,
I just bought my 2002 A6 2.5 tdi quattro 180hp last week.
It's a beautiful car, RS6 interior, RS6 brakes, Bilstein coilover suspension,...
But then again, a lot of little problems came to my attention during the first 600 miles of driving.
25mpg when taking it reaaaaly easy, and it's a stickshifter, not an AT
not having the same amount of power each time when putting foot down at same revs/gear
I read the ECU's fault codes, 'N80, kurzschluss nach masse' which means'N80 injector needle lift sensor shorted permanently to ground'
The funny thing about it is I don't seem to have such a sensor !!! All injectors look exactly the same and not a single one of them has an electrical wire attached to it.
Maybe this could already explain part of my complaints.
I had bigger injectors on my previous car (2.5 tdi AEL engine), they a very healthy power increase, but the dual mass flywheel spoiled the fun by vibrating so badly.
I definately want to try bigger injectors on this one. My question is which ones I will try. The bosio's seem to be the easiest option, altough I don't know if the PP683 will be quite big enough.
Will you try the PP683 first and then the R683 ? This would give us a nice back to back comparison.
Rumor has it some DAF and Cummins nozzles would also do the job, however part numbers seem to be rather unobtainable
And we need to be sure spray angles and size are the right match for our engines, otherwise it may be a short run
I am also thinking of getting my hands on a pair of BAU or BDG heads, the ones with the roller cams. Altough my cams are still fine I don't like the idea of grinding the lobes down over time.
From what I've seen I guess that the standard quattro exhaust is holding us a bit back on power. The exhaust can be separated under the gearbox, maybe interesting to pull a dyno run with free exhaust just to see if this is not the limiting factor that holds back the effect al the other mods you've made.
Hope to hear your findings soon
BR
Stefan