M103 engine MAP

JocDaviid

Hi from Costa Rica,

I have an W124 M103 3.0L Automatic Mercedes Benz, me and my mechanic Daniel Liannoi change the map for a custom one that it suppose to be more (economic) but the car act weird, is there any MAP that I can download for a default setting?, we install this Invent on March so is the V3 (I guess) but we bought on December 2021

Thanks and Regards,

JHM

JocDaviid
Hi! Default map files are bundled with the firmware. Just load it (or import only tables you need)

By the way, there is no "economical maps". This is common misconception, which is widely commercialized 🙂
Economy lies solely in driving style and car condition.

JocDaviid

JHM That's something new, Thanks! I will load the Default map of m103 that's may be the solution for a few of my headaches.

Regards,

JocDaviid

JHM Another question: how big can the exhaust be with the Invent turned on? My car has 1.8 inches but I want the 2.5 inches. Do I change it for better performance or should I keep it like it is right now?

JHM

JocDaviid
Beware that mufflers also play a big role in exhaust flow restriction.

As a rule of thumb - 2.5" is good for 200+HP.
1.8" is a bit restrictive for this engine.

JocDaviid

JHM So, how many HP has the M103 with the invent-jetronic? if is the California version should be around 180Hp or 188HP. So should I make this change to 2.5"?

JHM

JocDaviid
HP is limited with the engine hardware. So, if you make changes (intake, exhaust), you can expect some power increase. But, to be honest, it's not that much.
To make substantial power increase yoy have to put turbo, or simply bigger engine.

JocDaviid

Hello,

I upload the Default calibration and also upgrade the firmware, but now the cold start is falling, cannot keep the low rpm, once this get the normal operative temperature, this start to work normal, what can I do I fix it? for some reason on the cold start cars get more RPMs to get warm, but mine keep the RPM like if he is always warm... is this a engine issue on the minimum?

Regards,

JHM

JocDaviid
record a log of cold start (with Commander or android app)