What is the difference between an SiDi engine and an ordinary engine?

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Asked by Dec 11, 2009 at 02:04 AM

Question type: General

2 Answers

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Basically, the difference is that in SIDI, you have Direct Injection, meaning that the fuel injectors squirt the petrol directly into the cylinder, rather than into the intake port. This gives a more complete, more efficient combustion and allows the engineers to increase compression, lean the fuel mixtures and make a whole bunch of other changes to improve fuel economy, increase power and reduce emissions.

4 out of 4 people think this is helpful.

True; however, DI creates a carbon build up problem on the intake valves. You know, like the class action lawsuits against Ford's V6 DI engines.

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