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Citroen CX 1988 basic ignition table

EFI Tuning Fundamentals

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Hi, I'm trying to configure standalone ECU for my Citroen CX 25 GTi

Engine is 2500ccm NA, compression ratio 8.75:1, bore 93mm, stroke 92mm and 2 valves per cylinder

Originally, the engine was fitted with AEI electronic ignition using two coils and a wasted spark setup.

Now, I want to switch to full sequential ignition and injection using COP coils and Bosch EV14 injectors.

I found these ignition graphs (see attachment) in the service manual:

- the first graph is ignition advance relative to engine RPM

- the second is advance correction for engine load - on the X axis, there are two sets of points: D1 is in mBar, D2 is in mmHg

-- this is a vacuum (depression) value, so 0 is 100 kPa absolute, and 400 mBar would be 60 kPa absolute.

I can use these graphs to build a 3D ignition table.

My question is: is this a good idea, or should I use some general ignition table as a starting point?

thank you

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