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Old 03-31-2011, 11:08 PM   #1
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Cold air intake

If u install a cold air intake, is it best to follow it up with a new exhaust, headers, etc? Or does the CAI do the job it's supposed to without it?

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Old 03-31-2011, 11:15 PM   #2
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Cai doesn't really accomplish anything at all usually. Where is the air filter in your setup? Usually a factory airbox draws fresh air from outside the engine bay and most cai kits just draw in the hot engine bay air which makes them less efficient than a factory setup.

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Old 03-31-2011, 11:30 PM   #3
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Its all opinion, I took out my stock air box and put an AFE CAI in and love it, every thing else is still stock.
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Old 04-01-2011, 12:50 AM   #4
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Quote:
Originally Posted by Thebandit1980
Cai doesn't really accomplish anything at all usually. Where is the air filter in your setup? Usually a factory airbox draws fresh air from outside the engine bay and most cai kits just draw in the hot engine bay air which makes them less efficient than a factory setup.
I just have a K&N in the stock air box. Just didn't want to buy a CAI and then find out it's useless unless I upgrade the exhaust, headers, and whatever else.
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Old 04-01-2011, 12:53 AM   #5
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Its all opinion, I took out my stock air box and put an AFE CAI in and love it, every thing else is still stock.
What do u love about it?
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Old 04-01-2011, 09:03 AM   #6
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Run a "titles only" search in the JK section for "intake". You'll find dozens of threads on CAIs. They are not particularly well-loved.

They make a big difference in sound and an itty-bitty difference in performance. That's it. My guess would be they add maybe 3 hp at usable RPMs. You've got to balance that against their cost and any potential impact on your engine.

I suppose more would be accomplished by doing intake + viper throttle body + headers + exhaust, though I don't know how much. I saw a guy on another forum who did intake + headers + exhaust and got 9 more hp on dyno runs. That's 9 more hp and better sound for about $2300 worth of gear, assuming you install it yourself. Worth it?
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Old 04-01-2011, 09:26 AM   #7
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A low temp thermostat should be installed also when you put a cold air intake on. I've had mine for years and I love it.
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Old 04-01-2011, 09:39 AM   #8
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A low temp thermostat should be installed also when you put a cold air intake on. I've had mine for years and I love it.
Why is that? I would only install a lower temp thermostat if I strapped on a blower. I did 18 dyno pulls on the 4.0 and made 0 hp with my CAI. I would expect similar results, and I'll even give free dyno pulls to someone with a JK that has a new CAI to do before and after dyno tests (we have to install the cai at my shop)
Jeep Wrangler 18 dyno pulls for CAI testing - Trick Tuners Forums
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Old 04-01-2011, 10:11 AM   #9
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Thats a very nice offer, to bad I live in Omaha LOL. One its gives the jeep a very nice sound, I also got better mpg, and I could tell when I got on it the power was up. and to test this I did get a guy with the same jeep as mine gears, wheels tires, soft top- ok and we raced them, I pulled a way every time. I have 35's on now and it needs gears, but I still get by, not as quick, but it sure does sound good.
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Old 04-01-2011, 10:39 AM   #10
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There ya go.
Butt dyno and a drag race. CAI got some street kred now, yo.
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Old 04-01-2011, 04:31 PM   #11
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There ya go.
Butt dyno and a drag race. CAI got some street kred now, yo.
You are a pistol Bro...I actually laughed out loud at this...

YO...
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Old 04-02-2011, 05:54 AM   #12
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Why is that? I would only install a lower temp thermostat if I strapped on a blower. I did 18 dyno pulls on the 4.0 and made 0 hp with my CAI. I would expect similar results, and I'll even give free dyno pulls to someone with a JK that has a new CAI to do before and after dyno tests (we have to install the cai at my shop)
Jeep Wrangler 18 dyno pulls for CAI testing - Trick Tuners Forums
Low-Temp Thermostats increase horsepower and control engine temp by consistently metering water flow throughout the engine instead of simply cycling open/close, which in OE units creates temperature spikes.

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