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cold air intake

5K views 29 replies 8 participants last post by  White Chocolate 
#1 ·
has anyone installed a cold air intake on a 08 hemi.is it difficult to do?
 
#3 ·
It's just like any other intake. It's not hard.

Make sure you do other mods to back it up though.

Exhaust
Power Wire
Throttle Body (I'm getting Fastman TB)

I have a 3.7 so I won't be doing exhaust. I will do an intake along with the power wire if I install a Fastman throttle body.

Don't just do a CAI alone.
 
#5 ·
Naw, there is absolutely nothing "wrong". You just won't benefit from it alone.
 
#7 ·
Why don't you and your "white chocolate" go to another thread. Lol. J/K. In my opinion and experience with a Subaru STI, I wouldn't do an intake alone.
 
#18 ·
big difference.. the reason for the STI intake, is that its a turbo car and messes up the air fuel ratio.

Its been discussed here to no end. The intake will show performance gains for a while, as more air will lean out the mixture

After the ecu learns its there, it will richen it up a bit.

So many companies steak claims saying that youll gain xx horsepower doing this compared to xx from this other company, really you cant go too wrong. If i did it over again, id go with a bwoody because its a true cold air intake, unlike the short rams

Air intake was my first mod on the jeep too. Thats where it all started :)

expect an hour or two if you have never done it. But its a learning experience and pretty much any intake will come with instructions
 
#8 ·
I'd like to know what benefits you got from it. Gas milage?
 
#9 ·
My gas mileage went up and my friend in the city owns a dyno at his performance shop. Every year we get to have 2 free dynos. I was able to gain 7.3 hp from stock, to intake.

Benefits WILL increase with more stuff, tuner, tune, exhaust, etc etc, but you WILL see a gain from an intake alone.

Plus they sound badass...enough said.
 
#10 ·
7.3 at how many RPM's? I'm assuming you'd be driving all over town at WOT.
 
#11 ·
I have the Fastman TB on my WK 4.7 and I'm waiting to see if Bwoody come out with a CAI before I make a decision on what to buy. I didn't need to give it any thought because I was running a fastman TB and CAI on my previous lifted Jeep Cherokee. The '08 4.7 is already pretty responsive but the TB made it more so and more usable in the hills. I am not yet running a lift or larger tires but my experience with the XJ showed the advantage - the lifted XJ had struggled on my hilly commute to stay in 4th gear and would never get into 5th. After the TB/CAI I was able to get back 5th and stay in 5th for the commute. I had tried the CAI on it's own and saw a small improvement but it was only after adding the TB with the CAI that I saw the noticeable difference. This was general driving not WOT but it did help there too.

If you are thinking about this just to say the newer WK TB's plastic is fragile. Don't overtighten the clamp when installing especially if you have a modified TB that has less material.
 
#12 · (Edited)
I'd buy a Fastman TB before I buy a CAI.

Edit: And did I mention that the Fastman TB will save gas. You'll save gas by actually using less power. And it's cheaper than a CAI.
 
#19 · (Edited)
<Any major gains in horsepower or torque>

I haven't spent the cash to get it dyno'd but it's clear that eliminating or reducing downshifting on climbs after installation of the TB has made a big difference - and that continues after 8K miles. I will add a CAI to it but will hang on for Bwoody a while longer, I expect the CAI to be less restrictive and allow the larger TB to perform even better. I can't see how this would cause any warranty problems except on the TB itself. It's the same physical TB model but has been bored to a larger diameter (74mm), tapered further at the edge (77mm) and any restrictions removed/reduced. It's a 10min easy job to install.
 
#20 ·
<Any major gains in horsepower or torque>

I haven't spent the cash to get it dyno'd but it's clear that eliminating or reducing downshifting on climbs after installation of the TB has made a big difference - and that continues after 8K miles. I will add a CAI to it but will hang on for Bwoody a while longer, I expect the CAI to be less restrictive and allow the larger TB to perform even better.
Yep, I'd definitely do a Fastman TB before a CAI. But I'd definitely do both and not just a CAI alone.
 
#28 ·
How about they leave us alone until they start paying for our automobiles.
 
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