Hello, my French is not good, but I understand you are installing a 24v engine in your car. I believe the best (and lower cost) solution is to use the factory injection system. I have the engine from the 164Q4 in my Alfa 75 and I use the original ecu which has been reprogrammed on the dyno. With very few changes, I have 272hp. I am now going to build a 3.2liter engine and I have two solutions: one is to reprogram the 164Q4 ecu (I have 5 of them, 0261203301) and the other is an Emerald K6 ecu I have, which will plug into the existing wiring with a small adaptor cable. For road use, I expect to see more than 300hp from this engine with mild cams, better valve springs, 11.3:1 compression ratio, forged pistons, special rods, lighter flywheel, everything balanced and special exhaust manifold with ~650mm long 37mm ID primaries and 63mm exhaust. The original ecu for this engine is very capable, with 2 knock sensors and 2 lambda sensors for precise control. I also have 6-throttle ITB set but I will most probably use the single standard throttle plate or one a few mm larger.
Jim K.