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The knock timing map is stored in the stock or aftermarket EPROM, in the blocks 7C00 - 7CFF, and the knock fuel map is stored in the EPROM in the blocks (from memory) 7E00-7EFF. When the car goes to safety boost, the ECU does *not* cut communication with the EPROM, it loads the knock fuel map, which is programmable, and activates safety boost (I believe this happens by solenoid, but I've been wrong before). It's important to remember that the fuel maps in the EPROM are built to reflect an AFR, rather than a pulsewidth. The pulsewidth is a calculated item based on injector flow and latency, which are also entries in the EPROM (7F2B-7F2C for the injector flow, or "k value", and 7F88 for injector latency). The injector flow is a straight scalar used by the ECU to determine the amount of fuel your injectors can allow through. The injector latency is the amount of time it takes for your injector to open once it receives a signal. If these two factors were programmed into your ECU in some hard-wired fashion, then you would likely wash down your cylinders if you were running 555cc injectors when it expected 370cc injectors in limp mode. There are threshold values that are also programmed into the EPROM, but those (the minimum pulsewidth and maximum pulsewidth) are not really pertinent to the discussion. Sorry, but basically your premise is all wrong. :)
Your powers are useless! I'm wearing my tinfoil underwear! |
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