It seems that some of you can't believe what I'm saying.

Concerning the downforce it is logically correct. The mod works just like the lip spoiler, but the only difference is that it is placed behind the front wheel.

About how it feels, maybe it is psychlogical, but I did feel that the lane change action was more stable at 60 kmh.
Anyway I'll test the car at Tsukuba next month.

About the reliability, this mod is tested by many professional drivers (incl. Aguri Suzuki) so I believe it works.

The mod is made of aluminium panel plus stiff rubber fin (the red part).

If you still think that this item is fake, well, nobody is gonna stop you from not buying it.

 

Just 'cause Dan Marino sports Isotoner gloves doesn't mean I'm gonna wear 'em on my next mountaineering trip.

I prefer to use my own brain when evaluating a product instead of trusting someone else's.

Anyway, the front lip spoiler prevents air from going underneath the car in the first place. This thing takes air that's already under the car and directs it downward (as well as outward, as they claim). For every action there is an equal and opposite reaction, so if your car is pushing air downward, the same air is pushing your car upward.

 

reen,

When deciding about a motor sports' product I'd prefer the evaluation of a former F1 driver rather than an amateur's (= my personal) feeling.
But if you don't prefer doing that, that is your idea, which is totally fine.

Speaking about the air flow under the floor don't forget that the bottom of 350Z is far from "flat bottom". When the car is in motion there is air streaming in various directions, especially right behind the tyres, which is causing resistance.
The Ground Effector is supposed to control the air flow, so that overall the resistance will decrease, and stability to increase. It's different from putting the tail spoiler upside down.
(I suppose)

 

It is not like a chin spoiler. With a chin defelctor you prevent air from going under the car.

Once the car is already comitted to going under the car putting something in it's path doesn't sound like a good idea. I thought most race cars were dead flat underneath so they would not disturb the air under the car.

Once air is under the car you want a smooth flow to get it out of there. To me it seems this device would increase pressure in front of it. It _might_ reduce pressure behind it though.

Also, I really can't believe anybody could feel the difference of such a small spoiler at the low speeds claimed. I am not trying to be negative, but since people's money is at stake I need to question that particular claim.


Sorry, but this is starting to sound a little too much like a miracle product to me.

 

PS: If you look at the links in the origninal post they seem to be saying the same product will help a minivan to.

Are we really ot belive the same product that helps a Z (with low ground clearance) will also help a minivan that is several inches higher?

Dubious indeed.

 

In action :

 

the drawing shows air going into the ground... hows that work?

so in reality, the air is just being pressurized to go under the fin, thus lifting the fin, and the car(though I doubt its that effective to do much harm).

I suppose the idea is to move the air to the side, away from under the car, they dont seem to show that though. nor do I think it would accomplish it.

for the record though, the "proffesionals" opinion whom you trust is easily bought. hell I dont care if I hated the product, if you give me something for free, Ill love it.

also at 40-50mph, youd be real hard pressed to get any effect pos or neg from something like this, its not enough air flow.

sorry to rain on your parade, but it appears to be a tornado-ish product(you know the intake air swirler thingy), set up a pretty website, nice graphics, maybe an infomercial at 2AM, and OF COURSE scientific data to prove its value, along with a few professional indorsments.

 

It looks like its going to cause more drag than anything. I think most of us in here have coilovers or lowered springs on our zs so its not going to even be that much of an issue with the air traveling underneath a z. Since nissan has zero lift anyway on the z so way mess with it.

 

You said it right.

 

WOW! So now air is going to the ground and miraculously disappears there! Looks like a miracle, sounds like a miracle, must be a miracle.

I guess Tornado will go nice with this mod
http://www.tornadoair.com/index.php
There authors also achieved great results (2MPG fuel savings) by placing onstacle in path of flowing air

Also by using small kitchen exhaust fan in the airintake one can acieve far greater HP than all those turbochargers...

 

Well, too bad nobody seems to believe what I'm saying.

But don't forget. Consumers aren't stupid.
If it is really meaninghless it would not sell this much.

 

Well, too bad nobody seems to believe what I'm saying.

But don't forget. Consumers aren't stupid.
If it is really meaninghless it would not sell this much.

 

 

anyways.. anybody got any new info on a rear diffuser, that's what I need right now more than anything

 

IMHO
misapplied technology

 

Was looking at the option mag ad for the product, what the product does is not push the air down into the ground, it diverts it away to the sides of the car. So as it pushes air to the sides, i guess there is less air pressure underneath since there is less air bouncing around the open pockets behind this device to create up force and drag. It says it starts to work from 50km/h on up.
Just reading the ad, not quite convinced yet, but would be amazed if this small device does what it says.

 

Yes, that's what the ad says, but it's not the whole truth. The angled face would indeed direct the flow direction of some of the air towards the outside. However, the spoiler shape will also divert air over itself, down toward the ground. If anything, this thing creates more turbulence under the car -- the opposite of the smooth, laminar flow found under a flat-bottomed car.

Look at it this way -- you could have a perfectly smooth undercarriage with a proper diffuser at the rear, a front splitter, and a rear wing off a Chapparal, and you'd still be hard pressed to tell the difference at 50 km/h.

 

Consumers aren't stupid?!?!?

How do you explain
Tornado
Slick 50
Gas line magnets
Miracle diet pills
Magnetic Q-Ray bracelets
Splitfire spark plugs

And yet... for EVERY SINGLE one of these products there are people and "professionals" who SWEAR they works. When they are tested they don't seem to work, but there are still people who swear they work even AFTER the tests show otherwise. That's when they start with "the test was flawed" or "you just don't get it".

The placebo effect is VERY powerfull and many people think _they_ are the one person on earth who is imune to it. They are mistaken.

 

I agree, the "theory" is push the air to the sides.

The reality is that pushing air requires energy. That energy comes from increased drag. The air passing under the car probably does less harm if you let it flow under the car un-deflected. Deflecting it will cause drag and could increase the pressure in front of the deflector.

Increasing pressure in front of the deflector is OK for a chin spoiler since it is creating pressure that is not under the car trying to lift it. (and keeping that air from getting under the car). Once the air is under the car, putting something in it's path seems like a bad idea. I am picturing a snow plow blade under a truck instead of in front of it.

Just my $0.02

 

That is a great description of why we are only measuring placebo effect here.