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Old 12-13-2019, 10:19 PM
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Cold air intake on Jeep JKU

I got a 2010 Jeep JKU. I've had a High performance exhaust, K/N cold air intake and a superchips flashpaq running 87 or 93 tune since I lifted and added 35's 6 years ago.l, bought in 2013. Anyway back when I had death wobble the CAI bracket broke and I removed it and put the stock box back on. Didn't drive it from May of this year until about 7 weeks ago when I got it back on the road. I was averaging between 15.5 and 17.5 mpgs before removing the CAI. Now I've added a Magnaflow exhaust because the thrush broke off but other than that I changed the plugs and wires and oil. Now I'm only getting between 13.8 and 14.2 MPG and pretty much the same driving habits. Does the CAI make that huge a difference. I am surprised with all the bashing I see on them but I'm probably buying another. Has anyone experienced anything similar, just curious.

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Old 12-13-2019, 10:50 PM   #2
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I got a 2010 Jeep JKU. I've had a High performance exhaust, K/N cold air intake and a superchips flashpaq running 87 or 93 tune since I lifted and added 35's 6 years ago.l, bought in 2013. Anyway back when I had death wobble the CAI bracket broke and I removed it and put the stock box back on. Didn't drive it from May of this year until about 7 weeks ago when I got it back on the road. I was averaging between 15.5 and 17.5 mpgs before removing the CAI. Now I've added a Magnaflow exhaust because the thrush broke off but other than that I changed the plugs and wires and oil. Now I'm only getting between 13.8 and 14.2 MPG and pretty much the same driving habits. Does the CAI make that huge a difference. I am surprised with all the bashing I see on them but I'm probably buying another. Has anyone experienced anything similar, just curious.
Your factory airbox is a CAI - you wasted a ton of money on Kendra & Noreen for nothing. And if your airbox is the same as my 16 - it is one of the best at keeping water out.

What plugs and wires did you use?
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Old 12-13-2019, 11:00 PM
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I got a 2010 Jeep JKU. I've had a High performance exhaust, K/N cold air intake and a superchips flashpaq running 87 or 93 tune since I lifted and added 35's 6 years ago.l, bought in 2013. Anyway back when I had death wobble the CAI bracket broke and I removed it and put the stock box back on. Didn't drive it from May of this year until about 7 weeks ago when I got it back on the road. I was averaging between 15.5 and 17.5 mpgs before removing the CAI. Now I've added a Magnaflow exhaust because the thrush broke off but other than that I changed the plugs and wires and oil. Now I'm only getting between 13.8 and 14.2 MPG and pretty much the same driving habits. Does the CAI make that huge a difference. I am surprised with all the bashing I see on them but I'm probably buying another. Has anyone experienced anything similar, just curious.
Your factory airbox is a CAI - you wasted a ton of money on Kendra & Noreen for nothing. And if your airbox is the same as my 16 - it is one of the best at keeping water out.

What plugs and wires did you use?
Same as came off of the jeep as far as plugs and wires. It's been getting the same gas mileage since before I did the plugs and wires. I just did them to see if it would make a difference. Just thought since it sit it may of needed some tuning. As far as the CAI, I got it sent to me for free so no money lost there but a 2016 has a completely different engine and setup and plastic tubing compared to polished aluminum on a real CAI isn't going to run as cold. I've seen the temp comparison between stock and Aftermarket CAI, my engine ran 10-15 degrees cooler with the K/N on it. I wasn't asking for judgement, asking if anyone experienced the same results as I have.
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Old 12-13-2019, 11:34 PM   #4
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Not buying cooler running temps on an engine by swapping air intakes. These things are a big waste of $$$. Just make noise when you step on it an the filter is exposed when the hood is up.

Just my .02
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Old 12-13-2019, 11:38 PM   #5
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I got a 2010 Jeep JKU. I've had a High performance exhaust, K/N cold air intake and a superchips flashpaq running 87 or 93 tune since I lifted and added 35's 6 years ago.l, bought in 2013. Anyway back when I had death wobble the CAI bracket broke and I removed it and put the stock box back on. Didn't drive it from May of this year until about 7 weeks ago when I got it back on the road. I was averaging between 15.5 and 17.5 mpgs before removing the CAI. Now I've added a Magnaflow exhaust because the thrush broke off but other than that I changed the plugs and wires and oil. Now I'm only getting between 13.8 and 14.2 MPG and pretty much the same driving habits. Does the CAI make that huge a difference. I am surprised with all the bashing I see on them but I'm probably buying another. Has anyone experienced anything similar, just curious.
Your factory airbox is a CAI - you wasted a ton of money on Kendra & Noreen for nothing. And if your airbox is the same as my 16 - it is one of the best at keeping water out.

What plugs and wires did you use?
Same as came off of the jeep as far as plugs and wires. It's been getting the same gas mileage since before I did the plugs and wires. I just did them to see if it would make a difference. Just thought since it sit it may of needed some tuning. As far as the CAI, I got it sent to me for free so no money lost there but a 2016 has a completely different engine and setup and plastic tubing compared to polished aluminum on a real CAI isn't going to run as cold. I've seen the temp comparison between stock and Aftermarket CAI, my engine ran 10-15 degrees cooler with the K/N on it. I wasn't asking for judgement, asking if anyone experienced the same results as I have.
Factory stock box is good at keeping water out but it is not CAI. A snorkel is a true CAI. Before the snorkel my intake temp was +40 degree higher than the air temperatures, with the snorkel is 5 degrees higher than air temp while driving and 10 stop on traffic. I've even seen some stock boxes deforming or suctioning part of the hood heat shield as it ages
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Old 12-14-2019, 03:26 AM
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Not buying cooler running temps on an engine by swapping air intakes. These things are a big waste of $$$. Just make noise when you step on it an the filter is exposed when the hood is up.

Just my .02
This is pretty much inaccurate info. They definitely do more than make noise when you drive. The tuner I have tells you the data and mine was between 112-115 degrees with the stock box after around 20 minutes of idle. With the CAI, I was between 90-95 degrees, same situation, same idle time. Didn't test it while driving but I saw immediate MPG improvements while driving and throttle response. I'll do another test when I figure out which one I want to get. That has to be the reason I'm seeing less MPGs on my rig, but if anyone else has had the same experience as me feel free to comment, I'd love to hear your take on it. Still appreciate the opinions as well.
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Old 12-14-2019, 04:07 AM   #7
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They also don't filter the air as well. For those who still have a warranty on their engine remaining, be aware that the presence of a CAI has prompted some dealers to void the warranty on the engine. Even for the Mopar CAI which is marked as a P item (Performance). The presence of any performance enhancement is cause to void the warranty of anything the part affects.
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Old 12-14-2019, 06:16 AM
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They also don't filter the air as well. For those who still have a warranty on their engine remaining, be aware that the presence of a CAI has prompted some dealers to void the warranty on the engine. Even for the Mopar CAI which is marked as a P item (Performance). The presence of any performance enhancement is cause to void the warranty of anything the part affects.

Never had a problem getting warranty work done on mine with the CAI installed. Once again I'm not asking for permission to install one, I'm asking has anyone experienced the same results as me after taking theirs off. I was skeptical as well but it's obvious that at least I know it made a 2 mpg difference and throttle response on take off and shifting was better. Just took a 40 mile trip one way this morning on Interstate 85 and I know on that same stretch I use to average 16.5 mpg and this time 14.1, that's just a crazy difference.

On a side note I did forget that I have Iron man 35x12.5-17 M/Ts installed now and I was previously running BFG K02 all terrains in the same size. The Ironman is around 12lbs heavier than per tire than the BFGs so that added roughly 48lbs to the jeep. But on the backside of that I ran Nitto mud grappler MTs 35's on it with the same setup a few years back and they are around the same weight as the Ironmans are. I didn't experience any MPG loss running the Nittos

Weight difference is BFGs- 66.5lbs a tire, Ironmans-78.9lbs a tire, Nittos-79lbs
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Old 12-14-2019, 09:32 AM   #9
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Factory stock box is good at keeping water out but it is not CAI. A snorkel is a true CAI. Before the snorkel my intake temp was +40 degree higher than the air temperatures, with the snorkel is 5 degrees higher than air temp while driving and 10 stop on traffic. I've even seen some stock boxes deforming or suctioning part of the hood heat shield as it ages
With our temp variance from -40 or colder to +110F (with humidex) in summer, I will never have the issues you do with the Texas heat.

Yes the factory airbox is a CAI - the intake is isolated from the rngine heat, cold air is sourced from outside.
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Old 12-14-2019, 10:08 AM   #10
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Winter formula gas .... happens every year around October. I never get as good of mileage during winter months.
Your CAI may give a bit better air flow but thatís more related to the filter then the pipe. Put a K&N filter in the stock box and you May see the same result.
As for hotter air through the stock air box, well that just doesnít make any sense at all. The stock box draws cool outside ambient air off the fender, not pre heated air out of the engine bay. Unless you have an intake that draws directly from outside the engine bay itís not possible. Lots of guys on here have already recorded this fact over the last 12 years. I also have a live temp tracker and with my stock air box I seldom see any more the 5 degrees difference between ambient outside temp and intake (in summer weather). Winter weather is too cold for that to be accurate..
The only true CAI is a snorkel.. but snorkel benefits are also cleaner air, and water crossing safety.


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Old 12-14-2019, 10:55 AM
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First off I did the temp check in a Heated Garage and the tuner tells the temp reading of the engine. 66 degrees in the garage both days. I did the reading 4 times with both and temp was between 110 and 112 with stock box and 90 to 95 with CAI sitting idle from cold start and temp taken after 20 minutes. I never had this fluctuations like this in winter or summer. Maybe .5 in the winter less but not never under 15.5. I was under 14, 13.8 Monday, it's back up to 14.1 right now but last December I made the same trip I did this morning and was at 16.5 mpg. Temp was around 40 degrees that day last year also.

Talked to my buddy who's running a short ram intake he got for $40 off eBay and we have pretty much identical setups including tires, he's running Nittos though and he's getting 16.2 right now, and he actually has heavier bumpers than I do, a 12,000lb winch, tire carrier and a 35" tire on the back. I think I might buy a short ram intake off eBay, the one he has and see if it makes a difference. I feel like that's got to be the problem, it's not driving bad, it's driving awesome other than the Gas mileage sucking all of a sudden
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Old 12-14-2019, 11:35 AM   #12
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Sounds like your mind was made up before the thread post.

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Old 12-14-2019, 12:09 PM   #13
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A CAI is not going to have that much of a dramatic effect (+3mpg) on mpg. If it did the Jeeps would come stock with a CAI to help meet CAFE standards. If you really did lose that much in MPG I'd say it's more likely the exhaust change that caused it. Also - don't trust the MPG calculations shown by the Jeep - calculate your own by hand each time you fill up.
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Old 12-14-2019, 12:34 PM
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A CAI is not going to have that much of a dramatic effect (+3mpg) on mpg. If it did the Jeeps would come stock with a CAI to help meet CAFE standards. If you really did lose that much in MPG I'd say it's more likely the exhaust change that caused it. Also - don't trust the MPG calculations shown by the Jeep - calculate your own by hand each time you fill up.
It made that much of a difference before. I was getting like 13-14 and after the superchips flash and CAI I was never under 15.5 as high as 17.5. Have unflashed it before and lost about 2mpg but never under 15, that was with the CAI still installed. Before the CAI and Superchips flash I was at about 12mpg. That's a better exhaust than what I had on it, plus it's the same one my buddies running on his rig still getting 16.5. I knows it's not the exhaust.
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Old 12-14-2019, 12:45 PM   #15
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Iíve run CAI on several vehicles in the last decade. In some situations a CAI is an improvement for air flow & lower temps than an OEM intake. Filtration can be close to the same as OEM but require a lot more attention & maintenance.

True story, we dropped a K & N - OEM replacement filter in a Ď01 Chevy 2500 w/ 6.0 gasser. The MPG went from 15 (stock element) to 11 (K&N) then swapped back to the stock element and MPG came back to previous numbers. Seems there was extra air flow and the stock mapping just threw in more gas.

Back to point - IMO I see no advantage to installing a CAI on my Ď16 JKUR. The OEM set up appears to be well designed.
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Old 12-14-2019, 12:45 PM
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I didn't have my mind made up but after talking with a few guys today I think I could be the CAI. No other explanation.

Someone on here told me the superchips wouldn't make that of a difference but I gained at least 3 mpg after the flash and another 1.5-2 with the CAI installed.
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Old 12-14-2019, 12:49 PM
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I’ve run CAI on several vehicles in the last decade. In some situations a CAI is an improvement for air flow & lower temps than an OEM intake. Filtration can be close to the same as OEM but require a lot more attention & maintenance.

True story, we dropped a K & N - OEM replacement filter in a ‘01 Chevy 2500 w/ 6.0 gasser. The MPG went from 15 (stock element) to 11 (K&N) then swapped back to the stock element and MPG came back to previous numbers. Seems there was extra air flow and the stock mapping just threw in more gas.

Back to point - IMO I see no advantage to installing a CAI on my ‘16 JKUR. The OEM set up appears to be well designed.
Not asking about a 2016 model which has 3.6 and 285HP. I got a 3.8 with 205HP totally different setup.
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Old 12-14-2019, 12:56 PM
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I’ve run CAI on several vehicles in the last decade. In some situations a CAI is an improvement for air flow & lower temps than an OEM intake. Filtration can be close to the same as OEM but require a lot more attention & maintenance.

True story, we dropped a K & N - OEM replacement filter in a ‘01 Chevy 2500 w/ 6.0 gasser. The MPG went from 15 (stock element) to 11 (K&N) then swapped back to the stock element and MPG came back to previous numbers. Seems there was extra air flow and the stock mapping just threw in more gas.

Back to point - IMO I see no advantage to installing a CAI on my ‘16 JKUR. The OEM set up appears to be well designed.
Also tuning can be a issue. If you don't tune it right after you install them it can throw the system or computer off. I agree they aren't for every vehicle.
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Old 12-14-2019, 12:58 PM   #19
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I didn't have my mind made up but after talking with a few guys today I think I could be the CAI. No other explanation.

Someone on here told me the superchips wouldn't make that of a difference but I gained at least 3 mpg after the flash and another 1.5-2 with the CAI installed.
You added heavier tires, which is additional rolling weight. That's what reduced your MPG.

Your CAI temps were read in a garage. You need to be moving for the CAI to "do its job."

If you want to install a CAI, do it. But it's snake oil and didn't increase your MPG by 3-4.

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Old 12-14-2019, 01:07 PM
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I didn't have my mind made up but after talking with a few guys today I think I could be the CAI. No other explanation.

Someone on here told me the superchips wouldn't make that of a difference but I gained at least 3 mpg after the flash and another 1.5-2 with the CAI installed.
You added heavier tires, which is additional rolling weight. That's what reduced your MPG.

Your CAI temps were read in a garage. You need to be moving for the CAI to "do its job."

If you want to install a CAI, do it. But it's snake oil and didn't increase your MPG by 3-4.

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Someone on here told me the superchips wouldn't make that of a difference but I gained at least 3 mpg after the flash and another 1.5-2 with the CAI installed.[/quote]You added heavier tires, which is additional rolling weight. That's what reduced your MPG.

Your CAI temps were read in a garage. You need to be moving for the CAI to "do its job."

If you want to install a CAI, do it. But it's snake oil and didn't increase your MPG by 3-4.

Wow, so I used a Procal and recalibrated the system for the 35's and saw about .7mpg change. Got a superchips Flashpaq installed CAi and went from around 12.8 to as much as 17.5 always normally around 16.5. I already had one installed so did you read the thread or just jump in and start posting your opinion which I can respect but in my opinion they make are not snake oil and made a difference on my rig.
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Old 12-14-2019, 01:47 PM   #21
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The 3.8 is not a 3.6 so who knows if there is an improvement or not. I would suspect fuel being the biggest cause in lost mpg.

With some vehicles adding a K&N (drop in) or an aftermarket short is beneficial and with others it is not. In the case of the 3.6 the gain is tiny and is not cost effective. Adding a true CAI is beneficial regardless of vehicle but still might not be cost effective.
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Old 12-14-2019, 02:14 PM
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The 3.8 is not a 3.6 so who knows if there is an improvement or not. I would suspect fuel being the biggest cause in lost mpg.

With some vehicles adding a K&N (drop in) or an aftermarket short is beneficial and with others it is not. In the case of the 3.6 the gain is tiny and is not cost effective. Adding a true CAI is beneficial regardless of vehicle but still might not be cost effective.
I agree. I'm not sure if it's fuel or the fact that the CAI is off of it. Last year running winter gas didn't see but about a .5 to maybe 1 mpg change and that's goes for every year since I had it installed. Could be a combo of both the CAI being removed and gas but I figure for $40 it's worth throwing one on and seeing what happens. I'll probably go ahead grab one of those covers for the filter that are water resistant, so probably more like $60 but it will be worth it if I see even a 1 mpg increase. If not then I'll know it's gas and I'll move on.
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Old 12-14-2019, 02:18 PM   #23
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They also don't filter the air as well. For those who still have a warranty on their engine remaining, be aware that the presence of a CAI has prompted some dealers to void the warranty on the engine. Even for the Mopar CAI which is marked as a P item (Performance). The presence of any performance enhancement is cause to void the warranty of anything the part affects.

Never had a problem getting warranty work done on mine with the CAI installed. Once again I'm not asking for permission to install one, I'm asking has anyone experienced the same results as me after taking theirs off. I was skeptical as well but it's obvious that at least I know it made a 2 mpg difference and throttle response on take off and shifting was better. Just took a 40 mile trip one way this morning on Interstate 85 and I know on that same stretch I use to average 16.5 mpg and this time 14.1, that's just a crazy difference.

On a side note I did forget that I have Iron man 35x12.5-17 M/Ts installed now and I was previously running BFG K02 all terrains in the same size. The Ironman is around 12lbs heavier than per tire than the BFGs so that added roughly 48lbs to the jeep. But on the backside of that I ran Nitto mud grappler MTs 35's on it with the same setup a few years back and they are around the same weight as the Ironmans are. I didn't experience any MPG loss running the Nittos

Weight difference is BFGs- 66.5lbs a tire, Ironmans-78.9lbs a tire, Nittos-79lbs
I’ll give you the answer you’re looking for 😂 I have a modified crawler. 2010 with 84k miles. I recently wanted to try a couple air boxes. I went from stock and did many tests to payson Arizona and back and ran it all week. Average mpg was 14.6. I then purchased the new airraid cold air intake with the aluminum cover to prevent water and dirt to get in etc. (I know the snorkel is better) but this is what worked for me so I got this. I did the same test and then the same drive to payson. The mpg was 15.8. After three months now, my average mpg is 16. It was usually around 13.5-14.5. People can talk all they want about wasting money. But have a better filter and creating more space in your engine bay is never a waste. And the propel with 3.6’s can’t give advice because their motor breathes so much different. No offense it’s just not he same as the 3.8. I’m no mechanic but I’ve noticed enoug improvements to justify 250$. After all that’s like the cheapest mod out there 😂😂 my front end alone has over 5 grand in it 😂
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Old 12-14-2019, 02:32 PM
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They also don't filter the air as well. For those who still have a warranty on their engine remaining, be aware that the presence of a CAI has prompted some dealers to void the warranty on the engine. Even for the Mopar CAI which is marked as a P item (Performance). The presence of any performance enhancement is cause to void the warranty of anything the part affects.

Never had a problem getting warranty work done on mine with the CAI installed. Once again I'm not asking for permission to install one, I'm asking has anyone experienced the same results as me after taking theirs off. I was skeptical as well but it's obvious that at least I know it made a 2 mpg difference and throttle response on take off and shifting was better. Just took a 40 mile trip one way this morning on Interstate 85 and I know on that same stretch I use to average 16.5 mpg and this time 14.1, that's just a crazy difference.

On a side note I did forget that I have Iron man 35x12.5-17 M/Ts installed now and I was previously running BFG K02 all terrains in the same size. The Ironman is around 12lbs heavier than per tire than the BFGs so that added roughly 48lbs to the jeep. But on the backside of that I ran Nitto mud grappler MTs 35's on it with the same setup a few years back and they are around the same weight as the Ironmans are. I didn't experience any MPG loss running the Nittos

Weight difference is BFGs- 66.5lbs a tire, Ironmans-78.9lbs a tire, Nittos-79lbs
I’ll give you the answer you’re looking for 😂 I have a modified crawler. 2010 with 84k miles. I recently wanted to try a couple air boxes. I went from stock and did many tests to payson Arizona and back and ran it all week. Average mpg was 14.6. I then purchased the new airraid cold air intake with the aluminum cover to prevent water and dirt to get in etc. (I know the snorkel is better) but this is what worked for me so I got this. I did the same test and then the same drive to payson. The mpg was 15.8. After three months now, my average mpg is 16. It was usually around 13.5-14.5. People can talk all they want about wasting money. But have a better filter and creating more space in your engine bay is never a waste. And the propel with 3.6’s can’t give advice because their motor breathes so much different. No offense it’s just not he same as the 3.8. I’m no mechanic but I’ve noticed enoug improvements to justify 250$. After all that’s like the cheapest mod out there 😂😂 my front end alone has over 5 grand in it 😂
That's pretty consistent with my numbers as well. It's tough to argue real world use when you see the results for yourself. Some people have never used them and want to say they are useless or snake oil or whatever. I was ready for the flaming, I appreciate your input. I feel more confident now hearing similar numbers.
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Old 12-14-2019, 02:35 PM   #25
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They also don't filter the air as well. For those who still have a warranty on their engine remaining, be aware that the presence of a CAI has prompted some dealers to void the warranty on the engine. Even for the Mopar CAI which is marked as a P item (Performance). The presence of any performance enhancement is cause to void the warranty of anything the part affects.

Never had a problem getting warranty work done on mine with the CAI installed. Once again I'm not asking for permission to install one, I'm asking has anyone experienced the same results as me after taking theirs off. I was skeptical as well but it's obvious that at least I know it made a 2 mpg difference and throttle response on take off and shifting was better. Just took a 40 mile trip one way this morning on Interstate 85 and I know on that same stretch I use to average 16.5 mpg and this time 14.1, that's just a crazy difference.

On a side note I did forget that I have Iron man 35x12.5-17 M/Ts installed now and I was previously running BFG K02 all terrains in the same size. The Ironman is around 12lbs heavier than per tire than the BFGs so that added roughly 48lbs to the jeep. But on the backside of that I ran Nitto mud grappler MTs 35's on it with the same setup a few years back and they are around the same weight as the Ironmans are. I didn't experience any MPG loss running the Nittos

Weight difference is BFGs- 66.5lbs a tire, Ironmans-78.9lbs a tire, Nittos-79lbs
I’ll give you the answer you’re looking for 😂 I have a modified crawler. 2010 with 84k miles. I recently wanted to try a couple air boxes. I went from stock and did many tests to payson Arizona and back and ran it all week. Average mpg was 14.6. I then purchased the new airraid cold air intake with the aluminum cover to prevent water and dirt to get in etc. (I know the snorkel is better) but this is what worked for me so I got this. I did the same test and then the same drive to payson. The mpg was 15.8. After three months now, my average mpg is 16. It was usually around 13.5-14.5. People can talk all they want about wasting money. But have a better filter and creating more space in your engine bay is never a waste. And the propel with 3.6’s can’t give advice because their motor breathes so much different. No offense it’s just not he same as the 3.8. I’m no mechanic but I’ve noticed enoug improvements to justify 250$. After all that’s like the cheapest mod out there 😂😂 my front end alone has over 5 grand in it 😂
That's pretty consistent with my numbers as well. It's tough to argue real world use when see the results for yourself. Some people have never used them and want to say they are useless or snake oil or whatever. I was ready for the flaming, I appreciate you input. I feel more confident now hearing similar numbers.
I’ll tell you the same thing I used to tell my customer when I sold Jeep and rams for a few years. Nobody on this earth can make you feel good or bad about your own spent money on purchases. When you wake up in the morning and look in the driveway, if you enjoy what you see, you’ll make the payment or money work. If you don’t, you’ll find a way to be angry. Drive what you love and upgrade the things you want, and if it’s a waste but it gives you peace of mind, after all, our kind is all we have. Might as well make it peaceful
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Old 12-14-2019, 02:43 PM
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They also don't filter the air as well. For those who still have a warranty on their engine remaining, be aware that the presence of a CAI has prompted some dealers to void the warranty on the engine. Even for the Mopar CAI which is marked as a P item (Performance). The presence of any performance enhancement is cause to void the warranty of anything the part affects.

Never had a problem getting warranty work done on mine with the CAI installed. Once again I'm not asking for permission to install one, I'm asking has anyone experienced the same results as me after taking theirs off. I was skeptical as well but it's obvious that at least I know it made a 2 mpg difference and throttle response on take off and shifting was better. Just took a 40 mile trip one way this morning on Interstate 85 and I know on that same stretch I use to average 16.5 mpg and this time 14.1, that's just a crazy difference.

On a side note I did forget that I have Iron man 35x12.5-17 M/Ts installed now and I was previously running BFG K02 all terrains in the same size. The Ironman is around 12lbs heavier than per tire than the BFGs so that added roughly 48lbs to the jeep. But on the backside of that I ran Nitto mud grappler MTs 35's on it with the same setup a few years back and they are around the same weight as the Ironmans are. I didn't experience any MPG loss running the Nittos

Weight difference is BFGs- 66.5lbs a tire, Ironmans-78.9lbs a tire, Nittos-79lbs
I’ll give you the answer you’re looking for 😂 I have a modified crawler. 2010 with 84k miles. I recently wanted to try a couple air boxes. I went from stock and did many tests to payson Arizona and back and ran it all week. Average mpg was 14.6. I then purchased the new airraid cold air intake with the aluminum cover to prevent water and dirt to get in etc. (I know the snorkel is better) but this is what worked for me so I got this. I did the same test and then the same drive to payson. The mpg was 15.8. After three months now, my average mpg is 16. It was usually around 13.5-14.5. People can talk all they want about wasting money. But have a better filter and creating more space in your engine bay is never a waste. And the propel with 3.6’s can’t give advice because their motor breathes so much different. No offense it’s just not he same as the 3.8. I’m no mechanic but I’ve noticed enoug improvements to justify 250$. After all that’s like the cheapest mod out there 😂😂 my front end alone has over 5 grand in it 😂
That's pretty consistent with my numbers as well. It's tough to argue real world use when see the results for yourself. Some people have never used them and want to say they are useless or snake oil or whatever. I was ready for the flaming, I appreciate you input. I feel more confident now hearing similar numbers.
I’ll tell you the same thing I used to tell my customer when I sold Jeep and rams for a few years. Nobody on this earth can make you feel good or bad about your own spent money on purchases. When you wake up in the morning and look in the driveway, if you enjoy what you see, you’ll make the payment or money work. If you don’t, you’ll find a way to be angry. Drive what you love and upgrade the things you want, and if it’s a waste but it gives you peace of mind, after all, our kind is all we have. Might as well make it peaceful
I didn't spend anything on the first one so it didn't really matter then, I got for free sent to me. I didn't run with superchips very long before I installed the CAI so I couldn't really tell if it was just the superchips or a combo of both giving me the gains. This is the first time I have had it off in 5 years so when I noticed the sudden drop it was kind of crazy to me. I was averaging 16.8 before removing it.
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Old 12-14-2019, 02:57 PM   #27
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Being a 3.8, and I have plenty of experience with them we had 3 of them in the family. Drove My 2008 for 10 years, traded in last year at 312,000klm it was my DD with 5.38 gears and 37Ē Pitbulls.. ONLY thing that increased the mileage up to 3mpg was tuning the engine for and running premium fuel with No ethanol.
Running a snorkel on the 3.8 did nothing for mileage. Swapping gears actually made more gains.
Paper filter vs free flow filter may be what you are seeing.


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Old 12-14-2019, 03:43 PM
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Being a 3.8, and I have plenty of experience with them we had 3 of them in the family. Drove My 2008 for 10 years, traded in last year at 312,000klm it was my DD with 5.38 gears and 37” Pitbulls.. ONLY thing that increased the mileage up to 3mpg was tuning the engine for and running premium fuel with No ethanol.
Running a snorkel on the 3.8 did nothing for mileage. Swapping gears actually made more gains.
Paper filter vs free flow filter may be what you are seeing.


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I'm running premium as well with the 93 Octane tune with the Superchips Flashpaqs. Been running 93 Octane for close to 5 years now.
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Old 12-14-2019, 05:06 PM   #29
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Many people continue to parrot the idea that the filters in a short ram don’t filter as well. As with everything there is a get what you pay for involved, but the “better’ quality short ram filters are better than a stock filter. This common misconception happens because if I said I had an air filter the size of a postage stamp and one the size of a screen door working at the exact same filtration, which one would let more contaminates into the engine? The bigger one of course.

So the argument of not using a short ram because the filters are less efficient is not correct. They allow more air into an engine, so 2 things, for there to be less contaminates they need to filter better than stock, which some def do. Secondly the engine would need to be able to use the increased volume of air.
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Old 12-14-2019, 07:33 PM
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Many people continue to parrot the idea that the filters in a short ram don’t filter as well. As with everything there is a get what you pay for involved, but the “better’ quality short ram filters are better than a stock filter. This common misconception happens because if I said I had an air filter the size of a postage stamp and one the size of a screen door working at the exact same filtration, which one would let more contaminates into the engine? The bigger one of course.

So the argument of not using a short ram because the filters are less efficient is not correct. They allow more air into an engine, so 2 things, for there to be less contaminates they need to filter better than stock, which some def do. Secondly the engine would need to be able to use the increased volume of air.
Totally agree.

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