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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> turbulator, revisited /cgi-bin/YaBB.pl?num=1267137782 Message started by JohnBoy on 02/25/10 at 14:43:01 |
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Title: turbulator, revisited Post by JohnBoy on 02/25/10 at 14:43:01 Here is a simple way to build a durable, high quality, turbulator that has very low airflow resistance. The honeycomb cell material is from Saxon Computer and is sold in 5x5 panels of hard plastic. Product description below: Use these 1/8" cells as a fanless intake for precision control of incoming airflow. Can be used as fanless intake for CPU, video card, hard drive or chipset. Many industrial applications. Cut to 5 x 5 inches, Larger pieces can be supplied on request. 3/4" thick (6:1 ratio) $6.99 The brass ring is made from 1" X1/32" stock sold at Ace Hardware $2.80. The ring and the honeycomb are held together with quick-set JB Weld, the only glue-up involved. The weight appears to be about 1/2 ounce. There is enough honeycomb left over to make at least three more. http://lh5.ggpht.com/_TCSH6bqjHEM/S4b2UOdSpiI/AAAAAAAAArU/CGIB7SlS6fc/s512/honeycomb1.jpg http://lh3.ggpht.com/_TCSH6bqjHEM/S4b2atxaKqI/AAAAAAAAArY/VX18NzOhqGA/s576/turbulator1.jpg http://lh6.ggpht.com/_TCSH6bqjHEM/S4b2gQM-pbI/AAAAAAAAArc/8RAurjU1e08/s576/turbulator2.jpg With basic hand tools and a plumber's torch you can build this in a couple of hours. Total cost with shipping...$15.00 |
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Title: Re: turbulator, revisited Post by bill67 on 02/25/10 at 15:17:11 Let us know how it works out on the bike. |
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Title: Re: turbulator, revisited Post by Charon on 02/25/10 at 15:19:56 So, what it is supposed to do? Is it supposed to smooth airflow? Or cause turbulence? And given that it does whichever it is supposed to do, what is the overall effect supposed to be? What before-and-after measurements are you planning to make in order to see if it works? |
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Title: Re: turbulator, revisited Post by verslagen1 on 02/25/10 at 16:02:06 Cool stuff JB Although, I'm not liking the honeycomb, them little stars inbetween the straws will cause some drag. But it's affordable. [smiley=thumbsup.gif] |
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Title: Re: turbulator, revisited Post by Serowbot on 02/25/10 at 16:17:08 Don't know if it will work, but... that's a snazzy way to do it!... ;) and no worry about one straw getting loose and taking a trip... :-? |
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Title: Re: turbulator, revisited Post by JohnBoy on 02/25/10 at 17:03:32 I have one in the bike at the moment made from soda straws and pvc. "So, what it is supposed to do? Is it supposed to smooth airflow? Or cause turbulence? And given that it does whichever it is supposed to do, what is the overall effect supposed to be? What before-and-after measurements are you planning to make in order to see if it works? " Charon, there are several post over the last year from members. Basically, it smooths airflow between the intake filter and the carb. I don't have access to a dyno and I don't have standard jetting or air cleaner; but, seat of the pants tells me that it is stronger and has more torque. Diamond Jim found the same results. This mod has a "cleaner" cross section than the pvc version. |
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Title: Re: turbulator, revisited Post by verslagen1 on 02/25/10 at 17:30:54 Don't matter if it really works or how much or even why, you feel it. The turbulator is a misnomer I coined for it. DJ liked it, that's cool. The purpose is to smooth and straighten the air flow. I got the inspiration from the wright brothers wind tunnel, dj looked it up and got the info from nasa to make it right. |
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Title: Re: turbulator, revisited Post by diamond jim on 02/25/10 at 21:29:36 Each tube in the honeycomb does wo things. First, they straighten the air. Second, they accelerate the air. The summation of multiple tubes straitening and accellerating the intake air improves carb function by pulling fuel up through the jets and atomizing the air. It also improves cylinder filling. As far as improvememt goes, my experience is that it takes at least a 10% difference before I feel it. The turbulator didn't just make a noticeable difference, but rather a significant difference expecially at low to mid range where most of my riding is done on the LS650. |
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Title: Re: turbulator, revisited Post by PerrydaSavage on 02/26/10 at 00:37:46 Cool! A "smoothed out" airflow is what's known in aviation and/or ventilation circles as a laminer airflow ... Am interested to hear how this mod works out! |
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Title: Re: turbulator, revisited Post by bill67 on 02/26/10 at 02:35:42 A smaller carb will give you more low in power but you will lose on the high end,To me this is like putting on a smaller carb,It also makes it richer because you are taking up air space. A larger cab will give you more high end power,but you lose on the low end. |
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Title: Re: turbulator, revisited Post by Charon on 02/26/10 at 07:24:21 Bill's comment sort of echoes my thinking. Whether you straighten the airflow or not, you restrict the intake tract at least a little because of the space taken up by the walls of the tubing. That restriction seems exactly analogous to a restricted air filter. The result will be a slight increase in pressure drop, and a slightly reduced pressure in the carburetor. That will cause a slight richening of the mixture because the lower pressure can pull just a little more fuel through the jets. As soon as the laminar airflow enters the venturi, its turbulence will return. Then it will pass through the butterfly, and more turbulence will be introduced (a good thing, as turbulence helps mix the fuel and air to produce a uniform mixture). It will pass through the intake port and be split to enter the two intake valves. If all goes well, there should be a "swirl" produced as the air passes into the cylinder. Suzuki used to brag on their TSCC Twin Swirl Combustion Chamber, though I don't remember whether they claim it for the S40. That was probably because each of the two inlet valves produced its own swirl. Turbulence is extremely important within the combustion chamber, as that is the way to insure maximum fuel burn and efficiency. Many combustion chambers are so designed that at TDC the piston almost touches the head, producing a "squish area" that "squishes" the fuel-air mix into the main combustion area near the plug. |
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Title: Re: turbulator, revisited Post by verslagen1 on 02/26/10 at 08:56:06 While I think you're on track with your assumptions of increased restriction netting higher fuel flow... You don't give any credit to the straightened air flow yielding greater momentum thus pushing the air thru the carb and packing the cylinder better. |
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Title: Re: turbulator, revisited Post by bill67 on 02/26/10 at 09:08:01 The air is being sucked why would the air be unstraight |
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Title: Re: turbulator, revisited Post by Routy on 02/26/10 at 10:43:14 I myself don't believe in much of this, but seems this in in direct contradiction to the "more turbulent air making for better, more efficient air fuel mixture" that is used in the very popular "Toranodo" propellers air flow system, that so many swear by. Myself, I like water injection,....and then supercharge it ! |
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Title: Re: turbulator, revisited Post by thumperclone on 02/27/10 at 18:24:40 The Jet Scream(rf2inc.com)product description says their honeycomb "laminizes" the air.. at best you may gain 10% over stock... |
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Title: Re: turbulator, revisited Post by verslagen1 on 02/27/10 at 18:54:39 2F2421217B7A4D0 wrote:
Have ever flushed a toilet? Next time you visit someone with indoor plumbing give it a try. Now just so happens, the savage plumbing looks very similar only upside down. |
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Title: Re: turbulator, revisited Post by bill67 on 02/27/10 at 19:14:39 That clears it up ::) |
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Title: Re: turbulator, revisited Post by diamond jim on 03/08/10 at 09:05:15 http://i255.photobucket.com/albums/hh128/russ_diamond_jim/turbulator2.jpg JB, that's a sweet build. I'm jealous! Looking at the dimensions it looks like you are in the sweet spot of tube length being 6-8 times the diameter. I just say 7 times to make it simple. For those who don't fully understand the riding difference, and I don't know if I can fully explain it myself to the scientific degree that some desire, it does make a difference. It's not necessarily more power. It is more usable power. The low to midrange torque is noticablely stronger and it gives the powerband more width and depth. It doesn't add more power to the motor but instead makes the motor work better. Simple as that. For me, I had to downsize my pilot jet. Well, not necessarily downsize, but switch from one with bleed holes to one without. This is because the changes in airflow dynamics created a better overall vacuum and pulls fuel up through the jets with more efficiency. This I know for sure. What I don't know for sure but resonably suspect is that the improved airflow results in better atomization of the fuel and improved cylinder filling. If my top speed increased any it was maybe a 1 or 2 mph. But that's not the benefit of the turbulator. Stop and go riding, riding around town, riding mountain curves and such, it made my bike a lot more fun to ride. Also, the transitions between jets became smoother, making it easier to tell if the jets were set just right and easier to fine tune and know when you got it just right. So, it didn't add anything to the motor/power, it improved what was there and how it rides. If you ran the bike as a drag bike, primarily at wide open throttle all the time, there is a point where it might start to become restrictive. But I think the percentage of time that my bike has seen even 4500 rpm is less than 1% if that much. But it sees 1100 to say 35-3800 rpm all the time. And this is where the turbulator makes a lot of difference. |
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Title: Re: turbulator, revisited Post by verslagen1 on 03/08/10 at 11:18:18 I think you need independant testing. I volunteer. 8-) |
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Title: Re: turbulator, revisited Post by bill67 on 03/08/10 at 11:28:09 Being it restricts the air it helps the low end,You can put a sleeve in your intake manifold and restricts the air and it will help your low end power,It makes the mixture richer. |
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Title: Re: turbulator, revisited Post by verslagen1 on 03/08/10 at 13:22:53 444F4A4A1011260 wrote:
I like my shirt sleeves where they are thank you. :-? |
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