Induction
Understanding
induction systems on naturally aspirated engines
& turbo-equipped engines
Y
By Bill Fulton
You have heard it said before that the internal combustion engine is basically an air pump. The internal combustion engine has never been 100% efficient, but recent technology has improved the engine on a major basis with the
addition of intake runner control systems, variable valve timing systems and turbo and turboequipped engines. Before we look at these systems, let’s go back and review the fundamentals. The first rule is to FIGURES COURTESY OF BILL FULTON
Figure 1: A clogged converter on Bank 2 would impede those cylinders’ ability to breathe and would result in negative fuel trim values. The bank with a good converter will show double-digit fuel trim positive numbers.
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ASP
A ugust 2 019
