If you wanted to check out a DIY opensource EFI look into Speeduino.
I've started working on one for myself and my M60 V8, it's an Arduino based standalone EFI that uses TunerStudio. The developer is working on a Teensy board version for increased processor speed, but that's quite a ways away and still in development.
Speeduino enthusiasts are openly working on the source code themselves and an updated firmware version gets released every month or so. I'm currently adapting mine to the BMW 88 pin DME connector on my M3.3 system in my 540i for a "Plug'n'play" with a few modifications to the ignition system on the engine side for the waste spark.
Best of all, the end user financial commitment to get the system going is very low. Especially compared to other standalone EFI systems.
I've started working on one for myself and my M60 V8, it's an Arduino based standalone EFI that uses TunerStudio. The developer is working on a Teensy board version for increased processor speed, but that's quite a ways away and still in development.
Speeduino enthusiasts are openly working on the source code themselves and an updated firmware version gets released every month or so. I'm currently adapting mine to the BMW 88 pin DME connector on my M3.3 system in my 540i for a "Plug'n'play" with a few modifications to the ignition system on the engine side for the waste spark.
Best of all, the end user financial commitment to get the system going is very low. Especially compared to other standalone EFI systems.
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