I am somewhere in between. I have the shorter lancer spoiler on mine. Is my spoiler tall enough to take advantage of the vg?

 

if you look at the diagram posted - you can eye-ball that the mid-wing would be tall enough to benefit from increased velocity - if its main goal was down-force.

but.. (i believe) the shorter lancer wing is mostly cosmetic, and at best provides some drag reduction - similar to the type-r wing on integras. A VG and the mid-wing will not work together to create more downforce, but both drag reduction affects should be additive.

lol at your lack of math skill. when drag coefficients are expressed to the 100th, 0.006 is more than half a point - ie: measurably significant.

 

I am very aware of the meanings of coefficients, thank you kind sir.

But I'm willing to bet over half of the people putting VGs on can't take full advantage of the whole .006. I know people that have lost VGs doing speeds +100mph and didn't even know until days later. The car sounded and performed normally. Until someone post lap times showing improvements caused by VGs they will forever be just for looks IMO.

 

The VGs. is the most useless crap and this thread is nothing more then trying to sale its bs...If mitus makes a wing for the hook I bet there some way to make it fact too. All they needed to do is show bs poof with some color pictures and its sold to dumb as*

Marketing bs facts to dumb as* is where the money's at man!!

You are right, it is just for looks. In my opinion it give you that gay/f*g feeling that you have one on your car and no one else even though 90% of the people in here have it and it give you that lame look to your Evo like a ricer. I am willing to bet anyone that has one thinks they're bad *** (like a gay ricer)

 

I'm not totally knocking VGs because I do like the look of them. But thats just it, I like the look. I guess you can call it the inner 'ricer' in me. But I just can't support the whole functionality of them.

 

VGs have been used on aircraft for years, they are very effective in reenergizing the boundary layer of a flow field. If done right, this reduces drag and increases the effectiveness of aerodynamic devices (wings, stabilizers, etc.). Here's an interesting fact: the dimples on a golf-ball are also there to re-energize the boundary layer of the flow around the ball, which increases the range it will fly significantly (less drag).

However, there's more to it than just slapping a fin on the car. A lot of knock-offs have straight fins (aligned with the center line of the car), which don't do squat. In order for the fin to generate a vortex, it needs to be at an angle to the flow (that's what turns the air into a spiral=vortex). But if the angle to the flow is too large, all you do is create more drag because the flow cannot follow the drastic change in direction. Also, it's the angle between the VG and the local air-flow that matters, which is why each fin on the OEM VG has a slightly different angle (because the flow direction varies across the span of the roof).

Next time you take an airline flight, take a look out the window at the wing. Especially on older aircraft which had sub-optimal aero in the original design, you'll find VGs all over the place (along the wing span, on engine cowls, etc). Airlines don't do gimmicks that don't work - fuel is too expensive.

 

go ahead and replace "VG" with "Wing". I think the huge wing is just as rice as the VG. no lie. Also i would like to add - i like the VG just for looks.

 

i read somewhere that even without the wing it still benefits you. but who cares people will do what they want with their cars and should its theirs.

 

derekste, The Rexspeed VG's are smaller in height, legnth, and chord. The material is thin and the paint quality was poor. I gave the one I ordered away for free. voidhawk's post #51 has explained the theory, function, and application to a T. Before all the haters start, I've built and tested VG's and other aero bits in the wind tunnel for a factory ALMS Le Mans prototype for the past two years. They are not only used on top of the bodywork, but also under the car.

 

So basically, if you buy a knock off VG, you are only receiving the looks. So much for it being functional .

 

4 pages of Science, Engineering and aerodynamic experts



yes they work.

 

+1, this is old news

 

you know ... I was looking for a photo of the Voltex race front bumper because I seem to remember it has some VGs on the underside too, and then I realized that "vortex" in Japlish could be "voltex" - I wonder if that's where it came from?

 

most likely for look !!!!

 

Actually, it increases the pressure on the rear surface. Think of it like a vaccuum "pulling" the car back when there is less pressure, or like having a tail wind when there is more pressure. You can even see in the diagram you posted that there is actually an increase in density of air (and thereby pressure) on the rear of the car.

Actually, it was designed to work in conjunction with the wing. One of the VG's functions is to channel air toward the center of the car, and more air under/around the wing generating more downforce. They both have independent benefits but the benefits of the combination is great than the sum of their individual benefits. Also, extremely unlikely that the name was originated from vortex.

...... as marginally beneficial as either may be.

The purpose of these is less to generate a vortex and more to channel air. If you'll notice the vortex generators are all angled, and at slightly different angles spinning the air in a certain way. On the underside of the car this could serve to try and eject some of the air, but wouldn't be very successful at it with the tires directly behind it. The hopes of channel the air straight back is that it will travel under the vehicle at it's fastest speed negating the effect of the low pressure zone generated by the shape of the top of the car. If you look at the general shape of a car they are all shaped like airplane wings, and all generate lift. If you look at the wing on the rear of our car you will notice it is an upside-down wing. See a way things work if you don't understand why this shape generates a lower pressure zone, thereby generating lift or downforce.