Management engine10/22/2023 Yes, I know an 123ignition dizzy is what I need, but they're way too expensive - and proprietary. At these small displacements, we just don't care how the engine sounds: every HP gained is a win. > while testing showed it produced more power and better emissionsĪ customizable "ECU" similar to the Renix approach that does EXACTLY this, would be a godsend to me (and also my local old Fiat/Lada/you-name-it heads). It works really well, but that's it, no way to change or fine-tune anything. A crude ROM map is applied to the advance curve from just those two parameters. It has inputs only for manifold vacuum & crankshaft sensor (some support a knock sensor, mine does not). are wonderful, but I have no use for them because they're more geared towards fuel-injected engines (though some do have ways to run injector-less).Ĭase in point: I have a Renault R5 GTL with a Renix pseudo-ECU module taken from a Renault R11 TX, along with its camshaft, head, double barrel carb and other bits. Projects like Speeduino, rusEFI, MegaSquirt, etc. I'm still looking for an open ECU focused only on old, carbureted cars. Īnyway, it was an engaging project that taught me a lot about engine ignition, and I've now sold about 100 boxes and helped keep these old classics on the road. So I went back to the original crude steps. The most interesting thing to me was that when I went to a more modern ignition map rather than the crude 8 stepped curve they had originally implemented, while testing showed it produced more power and better emissions, people beta testing for me reported it felt 'too smooth, less fun'. It was pretty easy with the components available now to make a new circuit that protects from all that. The original boxes get fried easily by dirty jump starters, pulling the alternator while running, etc. One of the biggest updates I was able to do was to add a much more rugged power supply. It was interesting to see how crude but still effective the original circuits from the 1980's were, but also how much polish I could give to it while retaining form/fit/function compatibility, using an ARM Cortex-M0 and other modern ICs available to me. I had some fun a few years ago developing a replacement circuit for Ferrari 308/Mondial ignition ECUs, and then subsequently the ones for the 328/Mondial 3.2/Testarossa cars.
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