Join Date: Dec 2018
Location: Dorset, England
Vehicle: 2001 SLK320 auto
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Rewriting SLK320 ecu with the M112E37 3.7 engine map
Over the winter I plan on buying and rebuilding a 3.7l M112E37 engine from an SL350 and swapping the stock 3.2 M112E32 engine for it.
The 3.7 litre engine only differs in bore size and fuel injector size to the 3.2l every other aspect, bolt locations, wiring loom, ecu version, compression ratio is the same.
I want to either
A: have the engine hex file for the M112E37 flashed onto my current ecu. Both cars use Bosch ME2.8 and the same TCU etc so the hardware is compatible just need the correct engine map put on to my ecu because you can’t swap different ecus into different cars as they are coded to only work with the car they came with.
B have my 3.2 engine file re written to account for the different size fuel injectors and fuel trims.
Apparently you can run the 3.7l engine on the 3.2 engine map and they ecu will adjust the fuel trims using the lambda sensors.
So basically I’m asking how do I get the ecu to have the correct info on it to run the 3.7 l m112.
My plan is to have a 300hp NA V6 r170. I don’t want to do a v8 swap because of cost and complexity. The v6 3.7 swap is much easier apart from the ecu issue mentioned above.
Yeah I could buy an SLK350 but that’s just too easy 😂
Can anyone shed any knowledge on the subject?