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One of the advantages of EFI versus a carb is the ease of tuning it. Too rich? Don't worry about changing jets, a simple key stroke on the laptop will solve the problem. While we had a bank of computers for our test, a typical oval track race team would need just one. What is even more exciting is that there are self calibrating systems out there that will automtaically adjust parameters like air/fuel ratio based on certain criteria such as air temperature, humidity, and elevation.