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I have read that if you upgrade to a 2g MAS and evo 8/9 injectors, you can do without the SAFC for a while and run very good. The reason behind this is the evo injectors flow at about 580cc (even though they are marked as 560s). The 2g MAS reads about 30% less air flowing into the engine. So these cancel each other out (basically), and provide the correct amount of fuel. This isn't an exact science, but luckily our cars run naturally rich, so it give some room to play as this will lean it out a bit.
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