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Gen 3 Coyote DI vs PI
There have been many discussions on if you should adjust the port and direct injection percentages used. The simple answer is yes. Direct injection has been around for many years. It has proven its place to be more efficient than port injection. Yet more complex due to the need of a high pressure pump and the higher cost of fuel injectors. But with utilizing this technology we can reduce spark knock thus more power. This will add complexity to the tune side of the calibration since the injection timing will need to be tweaked based on the engines needs. Some of the downfalls of direct injection is the higher cost for the components and higher level of noise from the components. Ford has worked to reduce some of the noise with foam around the high pressure pump. With tuning it is not uncommon to hear a little more noise from the high pressure pump if the fuel pressure has been raised. This does not have any adverse effect on the pump life. To wrap this up, there are many benefits to working with the latest technical addition to the coyote engine.