Does the LMM have an influence on chip tuning?

I drive a Bora PD with a 100 horsepower engine. I had the engine control unit (ECU) flashed a while ago to 130 PS.
My LMM was fine, but I still exchanged it for one from Mercedes today. Now, the car feels worse overall, especially at lower speeds, compared to the original VW LMM. However, I can now easily reach 210 km/h (I didn't want to push the winter tires any further), which I could only manage with difficulty with the VW LMM. Can the exchange of the LMM affect the performance?

Positive side effect of the MB LMM: My clutch no longer slips. I know, it sounds strange. But it really is so. Before the replacement, the clutch was slipping severely, which it no longer does now.

hi,

If you had used the search function here , you would have known that the DC LMM has a different characteristic curve than the Bosch LMM. Specifically, in the areas where there is little or no excess air, the DC part measures lower values than the Bosch one. This leads to the STG reducing the injection quantity, which in turn reduces/is lower on torque and power. If it runs better at higher speeds, it may indicate that the Bosch LMM was not functioning properly!

'Take a look around the forum for information on LMM and DC, and you'll be able to explain a lot for yourself!'

But what causes the Bosch LMM to perform better at low speeds? Then it couldn't have been broken, could it?

Search function?!
And being able to read would also be a good thing.

In the rarest of cases, the bottom-mounted components do not achieve the desired values. Instead, they often develop a creeping flat spot on the top. This means that the specific volume of air is gradually decreasing over time. As a result, the amount of fuel injected is adjusted to match the air mass.

Why don't you try focusing on the dependencies of air mass, fuel pressure, and injection volume, and then it will suddenly become clear to you!

By the way, there are several threads here with logged values for the Bosch and DC LMM. Please take a look!

But what exactly makes the Bosch LMM perform better at low speeds? Then it couldn't have broken down, could it?

But! Bosch LMMs always operate in the upper speed range first! The LMM always measures the air volume per unit of time, and then the control unit calculates the air volume per revolution. As LMMs age, the maximum value decreases.

However, the maximum value (per time unit, not per revolution) is only required at high speeds (high air mass per unit of time). Therefore, the effects of an aging LMM are most noticeable in the upper speed range.

That the DC manifests itself downwards is simply due to its other characteristic.

Best regards and happy holidays
-Private

Edit: Jörg and Golfmann were faster

@Golfman
You're absolutely amazing. Just take the quotes from the previous speaker and make them sound clever. Really great!
I used the search function. But there is nowhere written whether the DC LMM influences the chip tuning.

But I'm sure you can answer it for me

@sniper3

There's no reason to insult anyone! You may have used the search function, but apparently you haven't quite understood the connections. An LMM can influence the fuel injection amounts, with or without tuning! Because it's Christmas today, here are a few links and then the castle!

/viewtopic.php?t=3870&highlight=lmm+dc
/viewtopic.php?t=3502&highlight=lmm+dc
/viewtopic.php?t=3765&highlight=lmm+dc
/viewtopic.php?t=2431&highlight=lmm+dc
/viewtopic.php?t=2801&highlight=lmm+dc
/viewtopic.php?t=4242&highlight=lmm+dc

to just list a few! due to these threads, I think all your questions have been adequately answered!