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Originally Posted by Willravel
Maybe you can point out where I said fuel efficiency. I'm under no illusions about the CAI's capabilities. It's about a small, theoretical power increase and small, theoretically quicker throttle response.
In my car, there was an increase in fuel efficiency with the installation of a CAI, btw. Of course, I have over double the HP of a Focus.
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Oh. Didn't realize you meant that. Let me correct myself then:
The installation of a CAI on an otherwise stock engine will be as effective as the installation of a loud muffler to increase power.
There will be no quicker throttle response because that is determined more by the design of the intake manifold than an intake pipe.
You have an Eclipse. I had one too and I experienced the same increases when I installed my bolt-ons. That was because those parts affected the performance of the turbocharger more than anything, namely in reducing lag. Turbocharged engines are much more responsive to bolt-on parts than any naturally-aspirated engine will ever be.
It's an all-or-nothing commitment with today's naturally aspirated engines. These aren't the engines of yesterday where they were intentionally choked up to meet fuel economy and emissions regulations and you could get away with adding a part here or a part there. The slight gains you envision are simply not there anymore.