Anyone done any research into chip sets for the 335d? I knows there are several available in Europe, buy haven't yet found any for the US.
What doesn't lie is the gas gauge....ignore the figures if you want, but the gas gauge won't lie, nor will my fill-up when the time comes. This is the same drive I've been taking since I've had the car, and I have never, ever seen these types of results, and only one thing has changed since I've been getting them. Hell, feel free to see every single one of my fill-ups:I advise against believing what the computer tells you for MPG. My E90 average mpg display often overstates my actual mpg significantly.
That said, how can a tune simultaneously increase power and economy? I have to be skeptical here - there are only so many btu's per gallon and they have to go somewhere. Either some of that energy was not getting burned in the stock setup (doubtful) or somehow the tune converts more heat to motive energy (also doubtful.)
I would buy that it is possible to get the same mileage with a tune assuming identical driving (which is probably hard to do when you have all that power available.)
51 days to ED 335d - I can't wait!
As has mine....you can ignore the MPG, but the average speed is pretty spot on (takes into account *any* time that the engine is running, regardless of what you're doing).My computer has been damn near nuts on for all 20 or so fillups I have done. Others have said similar results, I'd trust it. As far as gaining economy, I have seen that with diesel trucks before so long as the person is not using the new found power all the time.
I'm doing that for you, sir. I'm tracking MPG every day, without fail, regardless of results. My point isn't to brag or exaggerate, but to provide information...that's it. Like last night, the drive home was a bit rougher on the car (more uphill) and I ended up at ~650 miles estimated for the whole tank by the time I got home.My computer has been within a 0.5mpg + or - of my hand calcs, so I trust it.
Stugs, I am having a hard time to believe 46mpg for an extended period of time. That will be a feat for sure (or perhaps that is no feet!)
Actually, you can indeed tune an engine to improve mpg, but usually at some other cost, like emissions. More than likely BMW has adjusted this rig to meet emissions as a priority over mpg, although the two can and do go hand in hand. If you increase combustion temp you increase NOx, so they usually play with the the valve timing and overlap, plus start/stop of fuel injection. Then you play with Charge Air pressure from the turbo. Plenty to tweek with if you know what you are doing.:thumbup:
I'll give any tune consideration if price and results are right. I just don't want to be the guinea pig.
I honestly can't answer that question, obviously, since there's no DEF gauge to determine how much is left. I do know that I'm now at almost 12,500, and still no 1k warning.Wonder if DEF consumption increases by a noticeable amount with such a tune and not a constant heavy foot.