Cheers for that Fireman.
( a really useful figure of interest would be the rate of rise of clogging% by anybody else in any car
My dpf is now completely drilled through with several 10mm holes, and there are no problems
Pressure figures (in mbar) are looking like this..
No Exhaust..........14............39 (So this shows the exhaust is adding 12mbar of pressure at 3000rpm at that particular flow rate)
I performed another 'replace particle filter' routine to reset the respective dpf parameters to their baseline settings
I also ran a 'replace differential pressure sensor' routine this time, which claims to adjust for the new deltaV of the sensor which at a guess is stored in the sensor itself (kindof like the calibration value of a new injector and which never changes over the life of the sensor). I suppose that means it was pointless, but you never know ?
I test drove it for 1h20m non-stop, over fast backroads,, town streets, motorway (some hard accelrations and some relaxed constant revs at various speeds to let the ECU dial itself in), and idling for 10 minutes at roadworks. Considering that the ECU was reset too by also disconnecting the battery and that it had to relearn a lot of parameters all I can say is I am pleased overall with the mpg of 44. Two weeks ago that would have been impossible. As would 68mpg at 50mph in 6th gear on the flat.
For reference, I have 28 mbar of pressure at 70mph in 6th on the flat.
There are no ECU faults being reported. Turbo activity seems normal judging by the AlfaOBD monitoring I did throughout.
It is still a bit heavy on fuel on gradual inclines compared to an Audi A4 2.0tdi and BMW 1 series 118d, but overall the average is closer to the latest technology cars than it ever was before.
And the driving experience has been improved a bit more too, particularly when transitioning from overun to gentle acceleration when the pickup is almost instant. EG, on the motorway, flashing a lorry to let him out and sitting behind at 65mph, then when he's clear just gently touching the throttle makes the car pull away steadily, which is completely new to me, I had to previously give the ECU a big hint I wanted to go faster by pushing hard on the accelerator.
It used to feel heavy and underpowered, and now it feels like it can lug itself around well enough. The improvement feels just how you might think it would improve if you removed a major restriction from the exhaust
There's no visible smoke either.
This car will always feel a bit restricted because it is generally accepted on the tuning forums that Alfa chose to implement quite strict torque limiting on this engine and ECU, which is where the remaping starts to unlock the big licks from. (The EDC16C39 ECU is a torque centred engine controller, not a fuel injection quantity controller like it's predecessors, hence the the torque limiting ability is inherent in the design)
I did take some photos, I'll stitch them together somehow and write it up for anyone else who may be curious.
The bottom line is going to be that you make sure you have a blocked dpf before you begin to waste your time
And the clogging % value, measured towards the end of the journey, rose by 1.28% in 15 minutes, so that's 1.28 x 4 to get the hour rate = 5.12% So, as suspected, that's still in the same ballpark too