Possible Purchase - Page 2 - JeepForum.com

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post #16 of 21 Old 08-27-2012, 03:06 PM
IRSmart
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Originally Posted by FujativeOCR View Post
I bet air intakes and filters still work. I would imagine that yes the computer will notice an increase in air, and make adjustments, but how do we know what adjustments it makes? Does it change spark timing? Or does it increase fuel output/mixture to match the increased airflow? Wouldnt the latter result in more power?
they do, but we're talking about a car with 172 hp (assuming the larger of the two engine options). do you really think that you can feel a difference between 172 and 178 hp at the crank? these cars have such a small displacement that any gain will have negligable results. the "butt-dyno" can't be the benchmark for whether or not your CAI is working or not.

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post #17 of 21 Old 08-27-2012, 04:08 PM
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Actually, I bet you would feel a bigger gain from 8 more hp at 172, than you would at 300. It's a 4.5% gain at 172, 2.5% at 300.
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post #18 of 21 Old 08-28-2012, 08:43 AM
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With out knowing the change in the horse power curve relative to before and after it's a futile argument. The old style 4 cyl were made for low end torque which could be felt by the butt dyno. The new VVT is made for high end output and the electronic controls will pretty much deactivate that feeling unless it's perceived by more noise. But if it makes you happy that's what counts.

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post #19 of 21 Old 08-28-2012, 10:13 AM
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...or if youre just mashing the gas harder to see if it has more power...
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post #20 of 21 Old 08-29-2012, 07:00 AM
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Originally Posted by FujativeOCR View Post
Actually, I bet you would feel a bigger gain from 8 more hp at 172, than you would at 300. It's a 4.5% gain at 172, 2.5% at 300.
you get more of a gain with a car with a larger displacement, that's what i am trying to explain. these small cars don't gain anything measurable because of the engine's small size. but if you want to have one on your car because it makes you go faster, look cooler, or "improve throttle response" on an electronically controlled throttle, please, by all means, do what pleases you. i'm not here to tell anyone what to do, simply prevent the spread of misinformation.
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post #21 of 21 Old 08-29-2012, 09:48 PM
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But the OP or somebody on here said K & N guaruntees 8 hp. I was comparing 8 hp at 172 vs 300, if K & Ns claim is true. As far as throttle response, which is a different subject, I agree with you.
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