I did wonder about the unfiltered mesh part (OEM) and the new one has nothing in that square at all. I cut the mesh square from the old one before I chucked it - only because I thought I might put it in the gap but there must be a reason why K&N don't put one on theirs - maybe a reason why the OEM
does have it!
Anyway, the performance is loads better for the K&N and I have noticed the economy is also improved, simultaneous with adding it in so I assume it must be that?
Before I put the filter in I did a run to Devon - J30 M5+15 miles - via Dursley from Scunthorpe and at speeds of c 65-72mph I got about 56-58 mpg.
Coming back I stuck to 55mph (same route reversed) and the cumulative miles done + range (checked after about 180 miles) would have given me a range total of 724 which is probably in excess of the Fiat figures, claimed as 1000km on a tank, about 660 miles. Best shown average on the screen was 72.0 mpg.
There's a lot to be said for travelling at that speed too - much more relaxed journey, plenty more time to react to situations ahead, time to see the countryside you're travelling through and only a bit more journey time (set off earlier and be relaxed when you arrive!) Much better economy too of course.
Just returning to the thread title, can anyone say for sure whether the EGR can be deleted
without a remap? Maybe a question in two parts as I asked the local garage about this plus a couple of other things I'd like altering in the computer and he said his machine (universal for all makes with the little plug-in memory card marked 'Fiat') couldn't go that deep for at least three years after software releases. This gives the main dealer some exclusivety over small garages I guess.
He said the EGR plate insertion needed a remap. Plate £3.50, remap £250. How ridiculous is that?
The method sounded to be: download my car's individual memory print, send it to Germany as a file, they alter what I ask for, send it back rewritten, it's up-loaded into the car - Bingo, £250 please. Takes 3 hours.
So when the car goes in for another warranty replacement (see new thread "
DPF Sensor Hoses") I could ask them if they can delete the EGR on
their ECU reader and see what the response is. Hopefully not "We can't do that sir it's not permitted" - but I have to wait until Thursday to find that out.
R-V-M