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Jeep Wrangler JK Resources
JK How-to Guides
How to install a cold air intake
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<blockquote data-quote="Dirty Dog" data-source="post: 452194" data-attributes="member: 24042"><p>If we're going to turn this into an exercise in pedantry, it's only a cold air intake if the intake air temperature is less than 46F. </p><p></p><p>Air entering the engine compartment from underneath is cooler than air coming from the top. A CAI is engineered to maximize the flow of air and prioritize the air coming from the coolest area.</p><p></p><p>And of course, cold air intakes do more than simply change the source of air. They also provide a smoother, more direct passage of air into the throttle body. Which means more air enters the combustion chamber. Which means more power. Is it a huge change? No, it's not, and nobody with any sense will claim it is. </p><p>But the most fundamental recipe for increasing engine output is More Air In + More Fuel In - Exhaust Gases out = More Power. </p><p>In this particular case, the CAI + Free flowing exhaust + more aggressive tune + a general tune up = 30-35HP. That's not huge. But on an engine that was only rated at 285HP to begin with, it is enough to matter. Every little bit helps.</p><p></p><p>If you'd like to exam the physics behind this, read up on Poiseuille's Law. It explains in excruciating detail why a long passage, such as a snorkel, will make less power than a short one, like a CAI.</p></blockquote><p></p>
[QUOTE="Dirty Dog, post: 452194, member: 24042"] If we're going to turn this into an exercise in pedantry, it's only a cold air intake if the intake air temperature is less than 46F. Air entering the engine compartment from underneath is cooler than air coming from the top. A CAI is engineered to maximize the flow of air and prioritize the air coming from the coolest area. And of course, cold air intakes do more than simply change the source of air. They also provide a smoother, more direct passage of air into the throttle body. Which means more air enters the combustion chamber. Which means more power. Is it a huge change? No, it's not, and nobody with any sense will claim it is. But the most fundamental recipe for increasing engine output is More Air In + More Fuel In - Exhaust Gases out = More Power. In this particular case, the CAI + Free flowing exhaust + more aggressive tune + a general tune up = 30-35HP. That's not huge. But on an engine that was only rated at 285HP to begin with, it is enough to matter. Every little bit helps. If you'd like to exam the physics behind this, read up on Poiseuille's Law. It explains in excruciating detail why a long passage, such as a snorkel, will make less power than a short one, like a CAI. [/QUOTE]
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Jeep Wrangler JK Resources
JK How-to Guides
How to install a cold air intake
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