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  #13  
Old 12-01-2014, 10:25 PM
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Re: Cold air intake

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Originally Posted by jeepgcoman View Post
IMO, that's a good decision. I am not sure but, if your airbox is the same as the 4.7/5.7's, it is capable of flowing around 700 cfm of air though it. Your 3.7 (~226 cu. in.) is only capable of processing a little over 400 cfm at 100% Volumetric Efficiency (VE), assuming it will rev. to 6000 RPM. At about 80% VE, which is about average, you'd only be pulling around 320 cfm through the engine. Lower maximum RPM means a lower amount of air can be processed. I don't know what kind of setup goes from the airbox to the throttle body on your 3.7, but if it's anything like the one on the 5.7, it's got all kinds of silencer baffles/noise reducers which restricts the airflow from the box to the throttle body. If that's the case with yours, you may want to put some sort of tube (not metal) that will allow the free flow of air.
the 3.7 will rev to 6k on the rev limiter, or like mine, 6,200rpms (I bumped my limiter to 6,250) the intake is exactly the same as the 4.7 save for a slightly smaller diameter. the box is the same tho as is the locations of the iat and crank case inlet.

I will be designing a new intake, a performance one, that is a 3 piece setup. it will be a composite intake to reduce heat absorption. the upper pipe I will follow after the injin I have now. I will design a box to house a cone filter. then a lower pipe running down behind the bumper will ensure it draws the coolest air possible.

keep in mind I have improved the VE of the 3.7 by opening up the exhaust and porting the intake mani. everything that can be done except for heads is done. ill be getting fully race prepped heads in the next few years

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  #14  
Old 12-01-2014, 10:40 PM
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Re: Cold air intake

Good show, Jeff. Over the years I've messed with all kinds of CAI combinations, mostly on my Hemi LX. The hardest thing to achieve is to get rid of all the heat soak and have the temperature at the throttle body the same as it is in the airbox, when cruising around town. It's pretty easy on the highway and WOT, but difficult in town, especially in the summer heat.

Sounds like you have a good plan. It'll be interesting to see how it works out. Try getting a couple remote thermometers and place one in the airbox and one at the entrance to the throttle body and see how close you can get. Keep on tinkering!!
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  #15  
Old 12-01-2014, 10:56 PM
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Quote:
Originally Posted by jeepgcoman View Post
Good show, Jeff. Over the years I've messed with all kinds of CAI combinations, mostly on my Hemi LX. The hardest thing to achieve is to get rid of all the heat soak and have the temperature at the throttle body the same as it is in the airbox, when cruising around town. It's pretty easy on the highway and WOT, but difficult in town, especially in the summer heat.

Sounds like you have a good plan. It'll be interesting to see how it works out. Try getting a couple remote thermometers and place one in the airbox and one at the entrance to the throttle body and see how close you can get. Keep on tinkering!!
I will brother! The intake i have planned i really havent gone to much into detail on here as i do plan on making a very limited amout of them once i perfect mine. Maybe 5 tops. Ive already got some vacuum bagging supplies... (wink wink clue lol)
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Old 12-02-2014, 04:46 AM
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Re: Cold air intake

Hi guys. Thanks for your comments. The resonator box on my 3.7 has a clear run into the TB via a open pipe inside the box. There are other open chambers where the air will flow into, but the "main line" if I call it that, is a clean run through the box into the TB. For this reason, I reckon that the air flow is not much restricted. Since it is not a race car and top end revs are very seldom called for, I will keep the stock resonator box.
In South Africa, it will cost me a few thousand ZAR to fit the Cherokee pipe onto the TB and then still have to mod the wiring for the MAF.
Also I fully agree with the comments of Strongjeff. Thanks.
Thanks for your inputs.
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Old 02-25-2015, 08:56 PM
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Re: Cold air intake

So, I just purchased by 1st Jeep, a 2015 GK Summit with the 5.7L. Yes, my inner kid is coming out and I want more intake noise when I nail the throttle; what is the point of a Hemi if you can't hear it? My 2 cents. Is the Injen a better system than the CAI Mopar system? It certainly looks better and is about $50 bucks cheaper on Ebay...thoughts anyone?
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Old 02-25-2015, 10:05 PM
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Re: Cold air intake

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Originally Posted by rod15jeep View Post
So, I just purchased by 1st Jeep, a 2015 GK Summit with the 5.7L. Yes, my inner kid is coming out and I want more intake noise when I nail the throttle; what is the point of a Hemi if you can't hear it? My 2 cents. Is the Injen a better system than the CAI Mopar system? It certainly looks better and is about $50 bucks cheaper on Ebay...thoughts anyone?
as far as which is louder that would all be debatable. however the injin is a short ram intake while i think the mopar one is mid or full cai. i havent seen the mopar kit for the wk2 so im not 100% on that. honestly go with what you feel will give the loudest sound you want. a short ram like the injin will be your best bet tho. pair it with a good cat back and that hemi will roar!
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  #19  
Old 02-25-2015, 10:15 PM
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Re: Cold air intake

Well after hours of research I find out that very few companies offer a CAI (yet) for 2015's...I did find a VOLANT system that looks pretty good, I think I'll give that a try. Exhaust will be next. Nothing like taking a flame wrench to a vehicle with less than 1,000 miles on it!
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Old 02-26-2015, 07:11 AM
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Quote:
Originally Posted by rod15jeep View Post
Well after hours of research I find out that very few companies offer a CAI (yet) for 2015's...I did find a VOLANT system that looks pretty good, I think I'll give that a try. Exhaust will be next. Nothing like taking a flame wrench to a vehicle with less than 1,000 miles on it!
Well it's essentially a 14 so parts from that will work, even more possible for parts off a 11-13 tko work as well. Some times you gotta cross shop years too
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