Aeroturbine Mufflers - Owners only please!

SavageUrge · **Posted:** Fri Apr 13, 2007 1:00 am

I know there are some KJ owners on this board that run these Aeroturbine mufflers and I would like CONSTRUCTIVE INPUT on these from those users.

Edited for constructive content...we, the admins and mods will decide when someone is out of bounds. The original post was inflamatory in its nature and will not be tolerated.

My apologies to the moderator who edited this for going ape-doo doo, however I was still a little upset after what happened to my last thread. I'm sure you understand.

No Problem, that is why your second post was left untouched...it said the same thing in a better way :wink:

EOD-KJ · **Posted:** Fri Apr 13, 2007 2:13 am

ummm...what the hell

SavageUrge · **Posted:** Fri Apr 13, 2007 2:39 am

I don't know if you followed my last post regarding the vortex generators (those spiral thingies that go in your intake that supposedly give you better mileage, power, etc), but it got WAY out of hand, that's why the CAPS message preceding my question on my latest post. I'm always looking into ways to better my performance or mileage and with all those gimmicky things out on the market it's hard to know what works and what is crap. That's why I turn to this forum. It's loaded with people who are in the know and are willing to help anyone who isn't. This is why I was so disappointed when my last thread turned into a flaming match, consequently it got locked by a moderator. The thread was titled "Is there any truth here, or just junk science" if you want to see for yourself.

breakerbacker · **Joined:** Wed Dec 07, 2005 1:23 pm **Posts:** 76

Have one on our CRD. Fits very nicely in place of the factory's highly restrictive piece of crap. Good value also as the unit is stainless steel. As for sound levels, on the CRD you can't even notice it under there. It does cut down on turbo lag a bit which alone makes it worth it on the CRD. Mileage mostly unchanged, or maybe a .5 mpg increase. Keep in mind this is on a CRD, where the turbo really does a good job of muffling sound to begin with. I bet on the 3.7L it would sound good and you guys might even get a nice little jump in MPG's.

Good luck.

dieselenthusiast · **Posted:** Fri Apr 13, 2007 6:53 am

I have yet installed the aeroturbine on my Liberty, however I plan to in the near future. I do have an aeroturbine installed on my Truck, and I can assure you, it made a world of difference. Unfortunately, my truck is a diesel, and modifications make a noticeable difference on Diesels. Gasoline engines do not have near the upgrade impact such as huge mileage gains and adding enormous amounts of power. This is one reason why I prefer diesels over gasoline engines. From my research, the aeroturbine is a very advanced muffler that uses real technology. I’m not degrading any other company such as Borla, Magnaflow, etc. The idea of the muffler is to lower exhaust gas temperatures and relieve backpressure which results in increased power and increased torque that naturally results in better fuel economy. The aeroturbine creates a vacuum that keeps your exhaust flowing. The aeroturbine with the resonator quiets the sound, but does not restrict the flow in any way, shape, or form. The Aeroturbine AT2525XL is recommended for the Liberty. Just like my Diesel, there is a decrease in mpg if you take off your catalytic converter(s). Today, our sensors will cause the engine to over fuel if you take off your catalytic converter(s). Your factory pipe is very efficient and routed very well for your factory 3.7L Liberty. Taking off your factory muffler is probably the heaviest and lowest point on your entire exhaust system and will be eliminated with the aeroturbine as it is very small in size. As a matter of fact, there is no advantage to dual pipes or larger pipes unless perhaps if you are reflashing your computer or reprogramming. In this case, you want to talk to KYLIBERTY on this forum who has been there, done the research, and knows his stuff! The Muffler in nearly every application that I can think of is bad news from the factory. The EPA wants you to burn up as much exhaust gas as possible in the muffler before releasing it into the air. By taking it off, you are freeing up all that bogged down exhaust that is trying to escape in a stuffed baffled muffler that is highly restricted. Even my Stihl chainsaw runs much better when opening the small pin hole exhaust and will prolong the life of the saw by doing so. My other suggestion is to purchase a FITCH fuel catalyist, this might be your next best investment for fuel economy and keeping your injectors clean. I also recommend Amsoil from JJsKJ, who is a member on this forum and a great guy.http://www.hotrodoil.com/ He can provide you with the most efficient oil filters, air filters, and engine, trany, and diff oil on the market today. Anyway, I hope all this helps.

tulsa · **Posted:** Fri Apr 13, 2007 7:29 am

I have one and agree mostly with backbreaker, I did notice a little more engine noise, the jeep seemed to coast better, the turbo spools up faster and can be heard on occasion. No big change in MPG. Overall has been enjoyable.
Lewis

SavageUrge · **Posted:** Fri Apr 13, 2007 11:35 am

Thanks very much for all that great info, including the scoop on the fuel catalyst. I've never heard about that one before.

dieselenthusiast · **Posted:** Fri Apr 13, 2007 4:41 pm

MP JEEPER who is on this forum has an aeroturbine and is installing it as we speak He said he would let me know the results after putting some driving miles on it. He has the 3.7L. Perhaps he will chime in with noticeable results. My Cummins Turbo Diesel believe it or not saw a 1.5-2 mpg gain running empty at 70 mph. :shock:

Every 3rd generation Cummins owner that I know who has installed the aeroturbine has reported the same results. The results are so stunning that many Cummins owners are piggy backing with two aeroturbines butted against each other to create even a better flow and further decreasing backpressure and ultimately dropping their EGT’s. :shock:

After all my modifications, I am now receiving 26 mpg running empty at 70 mph with an additional 100 horsepower and 180 foot pounds of torque. :shock:

27 mpg when running 65 mph. :shock:

I expect to see at least .5 mpg increase with the aeroturbine on the 3.7L Liberty. I wouldn’t be surprised and actually am hopeful to see a 1 mpg increase. :wink:

spoonyG · **Posted:** Fri Apr 13, 2007 7:24 pm

No real milage change noted unless on longer highway trips (1-2MPG). I've had the Aero on my CRD for the last 15000 miles or so. I'd have difficulty really quantifying the improvements in pickup or economy to specifically because of the lift and larger tires.

I sounds better though, and does not have an annoying at highway speed drone like a straight pipe configuration.

Hood297 · **Posted:** Fri Apr 13, 2007 8:35 pm

I had a " tornado fuel saver" on my 3.7. set it in the intake tube right after the intake box, I actually noticed a decrease in fuel economy, while it wasnt drastic (about 0.9 mpg less). Shortly after this discovery i removed it.

In my way of thinking by the time that "swirled air" is on the combustion chamber its made soo many kinks and curves its no longer effected by the "tornado". I would think this would work better on a carburated engine since fuel is mixed right at the intake in most cases.

desertkj · **Joined:** Mon Jan 30, 2006 8:24 pm **Posts:** 677

Hood297 wrote:

I had a " tornado fuel saver" on my 3.7. set it in the intake tube right after the intake box, I actually noticed a decrease in fuel economy, while it wasnt drastic (about 0.9 mpg less). Shortly after this discovery i removed it.

In my way of thinking by the time that "swirled air" is on the combustion chamber its made soo many kinks and curves its no longer effected by the "tornado". I would think this would work better on a carburated engine since fuel is mixed right at the intake in most cases.

Your comment kinda made me think that one of those (argh cant remember what they're called) throttle body spacers would be more likely to improve fuel economy than any of these other products which I have seen disproven many times. Also, I have heard of people increasing fuel economy with new exhausts or even just new mufflers.

Hood297 · **Posted:** Fri Apr 13, 2007 10:08 pm

i saw a pretty decent increase in fuel economy when i added my flowmaster super 40 maybe about 1-1.5 mpg, and that was just replacing the muffler, not a new cat back system since they are essentially the same exhaust route just new...

dieselenthusiast · **Posted:** Fri Apr 13, 2007 10:37 pm

Hood297 wrote:

i saw a pretty decent increase in fuel economy when i added my flowmaster super 40 maybe about 1-1.5 mpg, and that was just replacing the muffler, not a new cat back system since they are essentially the same exhaust route just new...

Excellent report, hopefully that means the aeroturbine will produce pretty close to the same results.

I’m not surprised as modern day Mufflers are very restrictive.

Tokyojoe · **Posted:** Sat Apr 14, 2007 12:02 am

Savage:

Do you plan to or are you off-roading? If so, is that muffler heavy duty enough to handle rocks and logs? The stock muffler is pretty strong and handles off-roading quite well.

Just something to think about.

dieselenthusiast · **Posted:** Sat Apr 14, 2007 12:33 am

Tokyojoe wrote:

Savage:

Do you plan to or are you off-roading? If so, is that muffler heavy duty enough to handle rocks and logs? The stock muffler is pretty strong and handles off-roading quite well.

Just something to think about.

The Stock Muffler might be heavy duty, but it’s also very big, very heavy, and hangs low. As a matter of fact, it’s the lowest part on the exhaust system. The size is unnecessary extra weight. The aeroturbine will increase ground clearance, take up less space, provide better performance, increase the longevity of the engine, lower temperatures, and it’s made from stainless steel which is stronger than the factory aluminum muffler. For off-roading, racing, highway, or just as a grocery getter. There isn’t any reason why you wouldn't want to take off the restricted factory muffler.

SavageUrge · **Posted:** Sat Apr 14, 2007 4:13 am

I must really be behind the curve on this one. I pride myself on keeping up on "car stuff", but the Aeroturbine and the Fitch Fuel Catalyst have apparently been flying under my radar for quite some time now, since I'm seeing all these posts about them. I must be getting old :cry:

I appreciate all the posts and observations you're providing. I don't plan on going off-roading. My KJ is strictly a grocery getter, haha. Not that I would be opposed to wheeling it, after it's paid for though - 9 more months and she's all mine, :lol:

DesertKJ: I just removed my Airaid Throttle Body Spacer and sold it on eBay after running it for about 10,000 miles. The only difference I noticed was a neat "sucking" noise when getting on the throttle, but that was not enough for me to justify keeping it. The way it's designed is goofy as heck! It actually sits INSIDE your throttle body and therefore decreases the inside diameter of the TB at the entrance. If the idea is to get more air in, then why would they design it like this? I only paid $19 for it brand new on eBay about 9 months ago and just sold it for $54 - not bad, eh? Over time I believe it actually started decreasing my mileage due to the fact that I was averaging around 18-19mpg and currently I am averaging about 16-17mpg. I can't claim this to be scientific evidence however, due to the way my Liberty has responded to the gas prices. I know this sounds weird, but almost to the day that the gas prices spiked at $3/gallon, my mileage dropped about 2mpg. I was getting almost 21mpg until the price hike - Now I can't get above 17.5 and it really does fluctuate with the price. The higher the price, the lousier my mpg. I can't explain it, but before the inflated prices, my Jeep liked the cheapest gas I could throw at it. Now it doesn't matter what I fill it up with, not to mention I am religious about using fuel additives like SeaFoam or Lucas Oil every 2-4 fill-ups.

jcphoto20 · **Joined:** Sun Nov 19, 2006 1:36 am **Posts:** 507

make sure you do the seafoam clean in your intake also. (brake booster line)

EOD-KJ · **Posted:** Sun Apr 15, 2007 4:55 pm

where would one find an aeroturbine catback system for our KJs

jcphoto20 · **Joined:** Sun Nov 19, 2006 1:36 am **Posts:** 507

short of changing pistons and modifying your 3.7 to put up with a blower or nitrous, it is unable to put out any more horsepower than the stock cat back can flow. (with the exception of the actual stock muffler and the pinch down in the pipe right next to it) dont waste your time with anything other than a muffler change.

EOD-KJ · **Posted:** Sun Apr 15, 2007 6:22 pm

jcphoto20 wrote:

short of changing pistons and modifying your 3.7 to put up with a blower or nitrous, it is unable to put out any more horsepower than the stock cat back can flow. (with the exception of the actual stock muffler and the pinch down in the pipe right next to it) dont waste your time with anything other than a muffler change.

ill value your opinion in about never

Aeroturbine Mufflers - Owners only please!

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