EFI Express was contacted to build a fully plug and play ecu for the audi coupe quattro. This is a challenge on the coupe because the stock ECU fits up behind the dash in a way that would make it difficult to fit a standalone box in a different ecu case.
The stock ecu case was machined to accept the larger circuit board:
The stock circuit board was then modified so that it could be used to wire the VEMS circuit board while interfacing with the stock wiring harness
Here all internal wiring is completed:
And the finished product
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