Air Intake Question

[garyji]

Did a Google search to no avail. Could someone with way more engine knowledge than me please explain what all the "boxes and chambers" on the stock , plastic intake tube are for. I've noticed that all the after market stuff including the Mopar CAI don't have any of that. It's just a tube. Green stuff, mileage??

thanks,

G.

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[mwilk012]

Sound.

 

[BlackGenesis]

Dyno proven to only contribute to sound.

 

[BrntWS6]

helmholtz resonator

 

[garyji]

Thanks for the input. Never thought I would be having coffee and reading about Helmholtz resonators. More smart today than yesterday!

G.

 

[BlackGenesis]

Most of the time companies post misleading results to inflate their gains, sell product.

Due to horrible stock tune, intake gains are minimal- 5hp at the top end and hardly anything mid range.
Intake would be beneficial if you are to get a tune thru Livernois.

 

[garyji]

Not looking to do a CAI for any gains. I was just curious about all the "boxes and chambers" in the stock pipe. BrntWS6 said it all; "helmholtz resonator".

Thanks again for the education.

G.

 

[Tread4Lo]

It's amazing how big of chambers are on the stock intake tube too. I noticed when removing the PCM for the Livernois tune. There is one that hangs down, right at the 90* that sits behind the fan. In the words of Trump, "it's YUGE!"

 

[blnewt]

I wish they dyno'd Mopars outside CAI system. It draws outside air via the cut in hood vent. True CAI system.

Did you notice much gain there? Only one experience w/ a CAI (in our V6 Infiniti) and it robbed low-end torque for high rpm gain, not a good tradeoff for motors that don't have a lot of low rpm power to give away.

 

[Arterius2]

I wish they dyno'd Mopars outside CAI system. It draws outside air via the cut in hood vent. True CAI system.

What's wrong /w your hood there?

 

[sourdough]

Nothing. The hinges are extended to raise the hood for venting. Forum follows function and it works excellent. I use to get motor temp spikes during motor shut downs and the radiator fan automatically would come on high for a period at startup. Doesn't do that annoying jet airplane thing anymore. I don't think motor temp spikes are an issue with DD'rs.

 

[sourdough]

Did you notice much gain there? Only one experience w/ a CAI (in our V6 Infiniti) and it robbed low-end torque for high rpm gain, not a good tradeoff for motors that don't have a lot of low rpm power to give away.

I really don't notice any difference. There are a few videos of JL CAI dyno runs...
https://www.youtube.com/results?search_query=wrngler+jl+jlt+intake
I would never have purchased this CAI with my own money. My hood swap with a Sahara owner neted me $500.I used the cash to purchase the Mopar intake which is functional and unique.

 

[blnewt]

Well at le

I really don't notice any difference. There are a few videos of JL CAI dyno runs...
https://www.youtube.com/results?search_query=wrngler+jl+jlt+intake
I would never have purchased this CAI with my own money. My hood swap with a Sahara owner neted me $500.I used the cash to purchase the Mopar intake which is functional and unique.

Well at least you got the CAI that's a true CAI, should be worth a few top-end points

 

[Deleted member 53226]

Did a Google search to no avail. Could someone with way more engine knowledge than me please explain what all the "boxes and chambers" on the stock , plastic intake tube are for. I've noticed that all the after market stuff including the Mopar CAI don't have any of that. It's just a tube. Green stuff, mileage??

thanks,

G.

They are the resonators, and help very much with sound. For whatever reason, without them your Jeep will sound like it swallowed a frog. I've tried "smooth tube" intakes and got rid of every one because my JL made this annoying gutteral sound at low idle cruise.

 

[sourdough]

Here is a couple photos of the stock air intake tube with helmholtz resonators...
top view

side view

side view of Mopar CAI with no helmholtz resonator

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