[OpenFlash]

Hi guys,

I received an email from a South African customer this morning showing me a screenshot of what BMW can see when they interrogate the DME on an e90 M3 (Siemens MSS60 DME). Sometime between March and May 2011, the DME was flashed to run a higher 9000rpm rev limiter as shown in the FASTA histogram. Max engine speed was also recorded. In the case of the Siemens MSD80/81, it's reasonable to expect similar data for boost pressure data as well. There was a debate last year with some suggestion that FASTA max values are displayed as a % of the limit values programmed in the DME. This doesn't seem to be the case as some expected.

Shiv

[import36]

interesting indeed...

[onebadmofo]

Can INPA clear this when you clear error and information memory?

And wtf, 9k redline? Stock valvetrain?

[OpenFlash]

Originally Posted by onebadmofo

Can INPA clear this when you clear error and information memory?

FASTA data is not intended for diagnostic purposes so it cannot be cleared as you can with error/codes. It is used by BMW to see how their vehicles have been performing in the real world used by real customers. From this data, they can determine what, if any, future DME updates are necessary or useful for long term durability, drivability, etc,. They can also use the data to qualify warranty repairs (i.e., blown motor caused by over-rev/mis-shift). Presumably, the should also easily be able to tell if other operational aspects of the engine have been exceeded. And how often, and by how much.

And wtf, 9k redline? Stock valvetrain?

That's on an S65 (m3 v8) engine where the stock rev limit is 8400rpm.

Shiv

[GmoBmw]

I cant wait to see more data.

[ErvGotti]

So basically if BMW really wanted to they can bring up this kind of info on the N54/55 and it'll show them boost pressures a tell tell sign if you had a tune. So no tune on the market is 100% safe.

[OpenFlash]

Originally Posted by ErvGotti

So basically if BMW really wanted to they can bring up this kind of info on the N54/55 and it'll show them boost pressures a tell tell sign if you had a tune. So no tune on the market is 100% safe.

This visibility only really applies to flash based tuned. Piggyback tunes, on the other hand, work by effectively shielding the DME from higher-than-stock boost data. In the case of the Procede, the Procede computer feeds the DME a boost signal based upon its CAN DME Boost Target. Once the DME is satisfied, it controls boost all by itself without the DME knowing any better. The advantage is unrestricted boost control and complete diagnostic invisibility.

Shiv

[onebadmofo]

So it's pretty much like a block box. Wonder what's the size of it (kb).

Wonder if I can access it with ISTA/D, just finished building my cable but don't have my car yet.

From the screenshot it looks like they upload the ECU dump/logs dump to PuMA which gives them this info.

[dzenno]

Man, Shiv, why start something like this, honestly...you know where this always ends up...if it was a flash tuner posting something about inherently flawed piggyback tunes on this car you and your nut huggers would start a war immediately bashing them and calling them trolls...

Dude honestly, pretty low, but i'm not surprised...what does this make you? A troll? A hater?

[Rotorocious]

dunn dunn dunnnnnnnn

Cool.

[bimmertt]

In my opinion, this is not very earth shattering. I would expect BMW to capture this critical data to protect themselves. However, it seems like they have not used this data against their customers otherwise we would've heard about this years ago with warranties being voided left and right.

[TMR]

Great info.

[Jeff@TopGearSolutions]

Somewhat on topic, does this mean BMW can see your max speed? Meaning if you take off the 155 speed limiter that your top speed is stored?

[OpenFlash]

Originally Posted by dzenno

Man, Shiv, why start something like this, honestly...you know where this always ends up...if it was a flash tuner posting something about inherently flawed piggyback tunes on this car you and your nut huggers would start a war immediately bashing them and calling them trolls...

Dude honestly, pretty low, but i'm not surprised...what does this make you? A troll? A hater?

I posted a screenshot provided to me that puts an end to a debate from last year. I can also post a screenshot of a ~600whp dyno run controlled by a "inherently flawed" piggyback. I prefer to make points based on actual results/data. Not internet talk.

Shiv