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Engine Management

The modification of the engine management of current cars will need to be fundamentally based around the retention of as much as possible of what is already there. The best approach will be the re-writing of small elements of the factory software, or the interception and alteration of input and output signals. The latter is fundamentally a much poorer approach (you can't change the sensitivity of the knock sensor, for example), but until the software code of new cars is at least partially cracked there won't be any other realistic options. The days of programmable management being the way to go are simply finished.

Ten or fifteen years ago, the factory engine management computer had only a handful of functions - fuel, timing and idle speed control. With such a limited ability, replacing the system with a programmable aftermarket system was straightforward. But new cars are now simply nothing like this. A modern performance car is much more likely to have a management system that also controls the throttle, cam timing, turbo boost, automatic transmission, traction control, cruise control - and in addition, communicates with the security system, dashboard, ABS, and trip computer.