Originally Posted by tom @ eas
This is the answer I was looking for, as not every situation will play out the same. This shouldn't be approached as a "mod" but as a part of regular maintenance.
Let's explain things a bit:
M3PO's M3 was strapped to the dyno for Evolve software tune to perform a before/after dyno just to show approximate gains that would be as a result of flashing evolve-r software. After a few baseline runs, it appeared to be down on power for the specific mods that were installed. We really didn't even get a chance to test the new evolve software.
Thus, the troubleshooting process begins.
Since this was a 2008 model, there are a number of things to consider since miles were racking up. Spark plugs were recently changed, so we can rule those out as a possibility.
Other than running the car on the dyno some more and logging O2 activity, a VIN check was the next logical step, which showed that updates were performed shortly after purchase, or possibly not at all. A DME read showed early software (100E), which prompted for an update (231E), as we've seen considerable gains from this in the past on a number of early vehicles. After updating, M3PO's car showed normal power levels on the dyno again.
It's a good idea to keep current with updates, but dealerships will not update (for free) unless there is a considerable reason to do so. What I don't want to recommend is everyone calling their SAs and demanding updates on Monday morning - as every situation is different.
Best advice? Get a baseline dyno beforehand to eliminate the guesswork. Also, keep up on maintenance.
Brent: We'll see you on the dyno soon in the search for more power.
Thanks for chiming in on this Tom!
Originally Posted by Mike Benvo
You can update it to whatever OEM software you want without fear of warranty rejection.
However, you might cause issues if you update the DME to the newest version and fail to update other control units in the car.
In fact, this could potentially halt the dealer systems and could potentially mark your DME is failed when hooked up to BMW diagnostics equipment. This is because the ISTA/P integration level is different across modules in the car.
If you are going to perform an update to the DME, make sure you flash the rest of the car to the corresponding software level as well.
If you don't have DCT, what else should be updated?