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if you could magically get hp and gas mileage from a bolt on they would come with them stock.

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I see this excuse a lot and it doesn't make sense. A lot of vehicles nowadays come with 20's or bigger, stock. They could put 15's on them, stock, and gain MPG, be a little faster/lighter, and save money. But they don't. Same goes for a lot of what manufacturers do and don't do that adds nothing but bulk, and thusly less MPG.

CAIs don't make a ton of power, and usually don't live up to the hype of their makers, but the "if they were better the companies would do it" idea isn't really based upon reality.

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I see this excuse a lot and it doesn't make sense. A lot of vehicles nowadays come with 20's or bigger, stock. They could put 15's on them, stock, and gain MPG, be a little faster/lighter, and save money. But they don't. Same goes for a lot of what manufacturers do and don't do that adds nothing but bulk, and thusly less MPG.

CAIs don't make a ton of power, and usually don't live up to the hype of their makers, but the "if they were better the companies would do it" idea isn't really based upon reality.

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Sure it is. Our environmental agencies don't give a F about MPG. Output is measured in parts per million, so you aren't penalized for using more parts (aka worse mileage)

The extra power that a theoretical CAI offers is a direct result of increased pumping efficiency of the engine. If it were achievable the OEM would have done it in a second.

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if you could magically get hp and gas mileage from a bolt on they would come with them stock.

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Imagine how many 4L60e's would've been blown had GM not implemented torque management

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Those of you who claim a CAI made your car run lean, how did you draw that conclusion?

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ECU threw codes pretty much immediately, warning of lean condition. I never got a dyno tune to show the realtime A/F, but the car definitely wasn't happy.

After I did enough resets and drove enough miles, the ECU got comfortable enough with the increased airflow to stop throwing codes. I guess it gradually shifted its long term "trims" to compensate. This was with a CAI, HFCs, catback and no tune. Intake and catback have been on for well over 100K miles, HFCs probably 25K. Highway fuel economy is marginally better than stock, though I'm sure lighter wheels helped and the dropped suspension improved the aero a tad.

If I had to do it again I would have paid the money to get a custom dyno tune (Osiris) back when I had just installed these parts to make the most of them. Car is closing in on 200K now, and it passes inspection and runs well so that's really not on my radar anymore.

[This message has been edited by madd_ag_05 (edited 4/22/2014 12:46p).]

I'm more impressed that a nearly 10 year old truck only has 35,000 miles on it.

YES GET A CAI AND GET 100 MORE HORSEPOWERS!

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YES GET A CAI AND GET 300 MORE HORSEPOWERS!

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FIFY