Aero Turbine Muffler great results!!!!!!!!!!!!!

[rivercat]

I would use 4" every thing but the chrome turnouts would be 5"

the one they have on display is 4 " but only like 16" long total. if that

 

[elandon1201]

That will be much easier to work with and the sound is great

 

[Ten_Bucks]

anyone run one with stacks ? bet that sounds good. I got my local muffler shop willing to sell me their 4" model for cost just to see someone run it after its been stuck on their display for several months should I do it with 5" turnouts ?

Garrett Sheilds(Bobcat698) has the 5050L model on his '98 12 valve with stacks.

 

[R C Cola]

Moving gas faster ?

Take a 5 gallon water jug , turn it upside down to pour it out. Immediately

move the upper part of the bottle in a circular direction steady and continous.

The water will swirl out like in a bathtub, allowing air to enter up thru the

center of the swirl. Try it with a stop watch. You will find it empties faster.

Speed equals volume. I had to see it to beleive it. :--) Try it yourself. RC

 

[TRCM]

the theory is also very similar (but not exactly the same) as the simple fact that if you crack yer window, it sucks air out.



A high mass flow rate (main stream) moving past an opening will draw mass (air, exhaust) from thatopening. Since the outer flow is a greater distance, it is drawn along (entrained is the correct word). As this happens, more air or exhaust has to move up to take the place of the entrained air. This means less air mass or exhaust in the upstream stream, which means it will move faster.



it is how eductors work... and they have been working very well for many many years. It is also the same theory behind a jet engine, hence the aero turbine name.

 

[Diesel Power]

man you guys got me thinking, i want to see a dyno on this- i've never seen people rave about an exhaust like this before, any one got a dyno sheet or a sound clip???????

 

[Blblanchard]

Ok I am completely LOST

I read this thread just cause a guy said he enjoyed his new muffler, I am thinking about an aftermarket muffler for my truck, however now I am completely lost on the science of this stuff. So if anybody has an aftermarket muffler running on a stock 3rd gen 4" pipe and it sounds good and lowers EGT's please drop me a line or post. Thanks for any help.

 

[rivercat]

http://www.aero-turbine.com/how/index.html

 

[Luke Warmwater]

It's not how an eductor works. It's not how a venturi works. Those devices draw fluid/air from an external source into the stream. The aero turbine does not draw fluid/air into the closed exhaust stream. I suppose you could drill a hole in it, insert a tube, and suck water out of mud puddles as you went over them if you so desired. It most likely takes additional energy to accelerate a stream through a smaller cross section so that the low pressure area develops. The problem is what ambient pressure area does that low pressure area interact with? If you say the upstream exhaust then you are suggesting getting something for nothing. If I can draw exhaust out of the closed system by installing a low pressure generating device downstream that requires no external energy to drive, then why not install 20 of them? Heck by the time you're done you could actually suck the exhaust right out of the engine lol. Do they sound cool... sure. Ask any high school physics student about the theory.



In regards to the 5 gal water jug analogy. The reason for this behavior is due to the fact that air is going to try to enter the stream in a reverse flow to counter act the negative pressure area being created by water leaving the close system. Our engines are not closed systems. Air enters them through the intake stream. Take that same close 5 gal jug and drill a hole in the top of it equal to the hole in the bottom. Try it! lol

 

[Diesel Freak]

LMAO!!! Luke Warmwater hit the nail on the head!!



The "suggested" theory behind the Aeroturbine VIOLATES the second law of thermodynamics!!!!!



Its BUNK!!!!!!



No passive device can accomplish what the Aeroturbine is said to accomplish. In order to do what it is said to do, additional energy would have to be added to the system.





The following statement is completely FALSE!!!!!!!!!!!!!!!!!!!!

When the incoming exhaust air stream enters the AeroTurbine® it is rapidly expanded due to the properties of heat transfer

This is a passive device. Heat can only exit the system, and heat transfer ONLY occurs from HOT to COLD.



As the temperature of a gas drops, it's density increases, and thus its velocity SLOWS DOWN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



It slows even more as the cross sectional area of the pipe grows larger.



Anyone vever hear of Continuity?



V1xA1 = V2xA2

 

[RKerner]

LMAO!!! Luke Warmwater hit the nail on the head!!



Anyone vever hear of Continuity?



V1xA1 = V2xA2

Yup, assuming rho is constant. Bernoulli probably never imagined how many ways someone with dangerous knowledge could misinterpret basic fluid mechanics.

 

[DragonflyDriver]

So let's ponder this assertion...







Keep in mind I'm no fluid mech engineer but I did sleep through a few physics courses on my way to a BS Comp Sci. What is suggested is that by increasing the velocity around the outer section, the pressure is decreased, thereby creating a vacuum and "drawing" out exhaust. What seems to be lost is the fact that it requires energy to accelerate that exhaust and create that area of low pressure. You can't get something for nothing. If in fact the principle that is argued was legitimate, I have an idea that would make me a rich man. I would create a new fangled venturi and plumb then inlet back into the flow, down stream from the venturi itself. Seeing how this would increase the flow and thereby create an even higher negative pressure in my venturi, I would plumb another inlet down stream of the venturi. Pretty soon I would drawing fluid through at such an astounding rate that it would begin to excite the molecules around the venturi and sooner or later would create nuclear fission. Ok, maybe that last part is a stretch but I would have discovered a method of generating copious amounts of energy without having to added any external force to the system... something for nothing. Point is there are many who could argue what I just did in a more eloquent method but the result is the same. You can't get something for nothing.



Thinking to self... I wonder what would happen if I installed like 20 aero turbines in my exhaust system. The thrust alone from the exiting exhaust at such a high rate of velocity, would be good enough for some 1/4 times that would put even the big boys to shame... . hmmm. No longer would I smoke the tailgaters but instead I would just melt the crap out of your grill if you got too close!

That's a keeper Luke!

 

[TMarszalek]

AeroTurbine

I know all of you guys are intelligent enough to not believe every bit of marketing fluff for any product that manufacturers are trying to sell us! :-laf Having said that, I have an AeroTurbine 4040 on my '05! Have I noticed increased horsepower and/or lower EGT's? I'd be lying if I said yes! Have I noticed a nice rumble to my Cummins? You betcha! Of course, there are some who will analyze things to the most infinitesimal point because of boredom and those who purchase because of promised "testosterone in a box"! Whichever you happen to be, if it floats your boat, trips your trigger or blips your throttle, then go for it! The world would be a boring place if we were all the same!



My buck and a half's worth...

 

[DieselBuzz]

Did anyone else notice way back at the start of the thread that D Dubose said 8% twice, not 18%? How your seat can give you a percentage of increased performance might be able to be explained by someone smarter than me. I for one am glad he's got a muffler he likes, what it does exactly, well... If you don't like/believe it don't buy it, my two cents.

 

[TMarszalek]

I'll bet there's a lot of regret for that original post! Man, if I could detect an 8%... not 7, or 9, but 8% horsepower increase by the seat of my pants, I'd be a wealthy guy working for Foose, or McClaren or NASCAR!

 

[ToolManTimTaylor]

Did anyone else notice way back at the start of the thread that D Dubose said 8% twice, not 18%? .

And that it was started 12-17-2004, 02:33 PM :-laf

 

[DanaLittle]

If aeorturbines are junk than why do some nascar racers run them on their cars ? it can not hurt performance.

 

[TMarszalek]

Junk? Them's fightin' words! Opinions are like certain body orifices, everybody has one. My signature shows that I'm the satisfied owner of an AeroTurbine 4040! Does it do all that whizbang stuff the ads talk about? Who knows, and who cares! I like the mello throaty sound that comes from that 5" chromed tip!

 

[RailroadJim]

Most importantly the hot blond chick in the video says to use it.

 

[DieselBuzz]

On the second look...

D Dubose did edit both of the posts that say 8% so they may have read 18% at one time... ... . just throwing stones from my glass house.