Cold Air Intakes

[gvsvic]

I have an 01 wrangler with 2.5,5-speed, and 31x1050x15 tires. I see these ads where cold air intakes increase horsepower, and torque by 10 HP, and Torque by 10 ft lbs. I have been told by one company (afe) that they garantee this or your money back. I have been told on other jeep forums that these are a waste of money on a 2.5 engine. What do your members think? Thanks

 

[JPNinPA]

This alone will not sustain any gain. The engine computer will learn the change and adjust back. That was my experience on my 4.0. I spent about 2K on CAI, Headers, Cat Back, e-fan bored TB to 63mm... I may have picked some HP but I definitely picked up efficiency.

If your going to do a dyno run do 3 before any changes and three about 1000 mi after teh change.

 

[Bounty__Hunter]

You should see some gain, but I doubt 10/10 like they claim. They're pricey, better to make your own. I used a 4.0L airtube and attached a conical K&N filter to the end. Cheap and easy.

A 62mm throttle body, and porting the intake opening to 62mm, will make the largest difference. Check out www.4bangerjp.com for more 2.5L tech info.

 

[Jason4x4]

Also keep in mind that generally speaking, while a CAI will probably add a little horsepower (probably less than 10 as mentioned previously, especially if you have no other mods), you won't be able to "feel" any improvement. It takes a carefully calibrated butt-dyno to notice an increase of less than 10hp .

 

[southtj]

...you won't be able to "feel" any improvement. It takes a carefully calibrated butt-dyno to notice an increase of less than 10hp .

I can notice the difference in mine. I must have a pretty good butt-dyno.

Actually I only notice the difference on a couple of bridges I have to go over on my daily commute. I used to have to put the gas pedal to the floor to maintain speed going up the bridge but after the cai and spacer install I don't. I can even accelerate on the bridge. Very slowly but I can.

 

[jfrabat]

I would also notice the mod differences mostly on overpasses where I used to have to downshift, and after a mod I would not need to downshift, or I would shift higher up. But I agree with most here; I doubt you'll feel the difference of a CAI alone. And go to the site bounty recommended. Lots of info.

 

[buckshot500]

Mine are good for 200HP.............. each!
Of course I have to be traveling in a forward direction going at least 5mph.

 

[Jason4x4]

Mine are good for 200HP.............. each!
Of course I have to be traveling in a forward direction going at least 5mph.

You should add a third scoop between those two facing backwards so you still get your 200hp while you're backing up 8).

 

[TerryMason]

I've got an aFe in my 2005 TJ. I can feel some increase in HP, but I did not see any improvement in gas mileage at all. You can't hear any difference at idle, or around town, but if you floor it you'll hear a lounder engine sound, so if nothing else it sounds faster.

http://www.jeepz.com/forum/engine/30710-install-cold-air-intake-jeep-wrangler-tj.html

 

[xt master]

I noticed a difference with just the CAI.If you ask me 10 hp may be pushing it but with a 4 banger even 5hp is noticeable.I down shift less have more pick up on take off.I also picked up about 1 mpg in gas.

 

[gvsvic]

I noticed a difference with just the CAI.If you ask me 10 hp may be pushing it but with a 4 banger even 5hp is noticeable.I down shift less have more pick up on take off.I also picked up about 1 mpg in gas.

Thanks xt master, What brand did you use for you CAI ?

 

[xt master]

I found mine on ebay.I think they home made it looks like an AEM polished aluminum,which I know is not as efficient as plastic.Cost me $60 delivered to my door.