you're right, it does create the high pressure you are talking about. I said "i think", i'm not an expert on aerodynamics i just know the theory.
well here's a question for you then, do you think a car driven on the road daily will suffer more (whether that be from power, cd, or gas mileage, blah blah blah) from the high pressure under the front of the car or from the increase in drag in cutting holes in your hood?
Drag from hole/vents in hood. Expain as I am not aware of that, If there is I would imagine that it is slight and the benifts could out-weigh the costs
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Patrick Scott
Yeah, thats a roll cage in there.
I shall call him...Mini-Me
well i have no proof and no evidence. this is something that can only be known if we could test it and i don't have the equipment here. i'm only going by the logic that it's like opening your window, it creates enough disruption in the flow of air that it can affect your car...
In a desert out west, where a secret military base is thought to be. Its not really a military base, thats just "dis-information". Its really a secret Nismo test facility. All of those "UFO's" are really low flying Nissans. Now I am going to have to kill every one who reads this thread....lol
Seriously, I am interested in all forms of car perfomance. I just want to build stuff and try it out. My real high-speed test spot is a long stretch of Vermonts finest Intersate. Stock Sentra on the limiter=Scary, My lowered and stiffend up Sentra=a lot better.
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Patrick Scott
Yeah, thats a roll cage in there.
I shall call him...Mini-Me
Okay so im pretty much confused. Could you just answer whether or not rear wings create downforce or not? I understand if they are above the top of the car they would. What about solar wings? They kind of extend the roof of the car. I seen an *cough*accord*cough* wagon with a small wing on the roof, would this help in anyway?
Okay so im pretty much confused. Could you just answer whether or not rear wings create downforce or not? I understand if they are above the top of the car they would. What about solar wings? They kind of extend the roof of the car. I seen an *cough*accord*cough* wagon with a small wing on the roof, would this help in anyway?
Chris,
Yes theye create D-force, but only if properly designed.
The lil roof ones are for hatch backs and wagons, cuz thats all that will fit. I was once told that they do work. BTW on a car like ours, they do not have to be above the roof line, just high enough to catch clean air off of the roof of the car. Thats one of the questions no one has answered for me yet...How tall does it have to be???
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Patrick Scott
Yeah, thats a roll cage in there.
I shall call him...Mini-Me
the oem wing on some sentras and se-r's actually provide down force at 45 mph..stillens type 2 wing provides a bit more...though tall wing wont be good til about 120+mph...the front doesnt need down force because all the weight is up there..its nice to have some on the rear because if you have ever driven hard enough to get the back end swurly it'll make your heart drop!!!!..if you want more tracktion[?] up front go with wider tires...
The purpose of downforce via spoiler is to add the extra pressure on the wheels to make them spin harder. This is why a FWD car DOES NOT need a huge spoiler. The first person to reply to this had the right answer. A 240sx has use for this, as well as a booming stereo in the trunk because all this extra weight goes on the back wheels. In a FWD car it justs slows it down. And if you are thinking a large spoiler will help you it will not. It will merely make you look like a poor ricer who lives in a trailer and has no idea what real downforce is about. Spoilers on FWD cars are merely for show, except at exceptionally high speeds where the back of the car begins to lift off the ground. I heard this is speed is around 100-130mph, maybe higher. And in a ga16de, you would have to be driving WOT for about 5 miles to get your car up to 100mph, if it is even possible for one to go that high. An se-r, however...
ju§tin
96 se-r
Last edited by Crono1321 : Jun 19th, 2002 at 05:57 PM.
SXSENIS,
An OEM spoiler creating d-force...where did you hear that? The rear window on a Sentra is too steep for air to smoothly flow down to a OEM(read:short) spoiler. A tall wing would really act SOONER than a short one, not later. Yes FWD cars need front d-force(or reduced lift), most cars have front lift problems at high speed. Wider tires wouldnt help as much as you think becasue they are being lifted off the ground. A better aero package would be a better choice for other reasons as well(bigger tires=slower car due to weight, and more unsprung weight as well)
Crono1321,
The purpose of a spoiler is not to make the wheels "spin harder"(whatever that means?). The real reasons are: stability,traction/grip(lateral), and in some cases reduced(yes, reduced) drag. A big sterio would not do this. It would upset the car a low speeds where a wing would not. If you get a wing that reduces(again yes,reduces) drag, it would not slow you down. The oppisite would be true(better gas milage as well). For show you say..look at the pic below. You dont put a drag inducing item on a real race car for show. At high speeds, yeah thats where I want it, 100mph+. I am not going to drive around town with it on. BTW it doest not take my GA 5 miles at WOT to hit 100mph . Oh yeah...I have a SR20DET planned for my car after the suspension,and brakes are done. 100mph will only be a throttle crack away.
Please guys(not just you two) dont scream a ricer if you do not know the circumstances. To me or anyone else.
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Patrick Scott
Yeah, thats a roll cage in there.
I shall call him...Mini-Me
By spinning the wheels harder..ahhh (!!!) its hard to explain. You sort of wrote it out in your post. Basically by adding more weight/downforce, you can increase the pressure (am I using the right words lol its hard to understand I need an illustration). I know weight distribution is key as well, but from what I have learned you should have more weight in the back/trunk of your car if you want your wheels to grip better (?? I Know, just don't try to understand ). Basically, weight=wheels down=better traction=better torque/horsepower coming from your wheels. Am I correct? I am sorry my vocabulary seems to be quite limited tonight, therefore I can't seem to make a...competent explanation. And about the GA I was only kidding..you get up to 100 in 2 miles!!! Don't flame me! PLEASE! LoL Production on these DET motors should be up, all the GXE owners in the world are buying them these days Again, don't flame me!
Also, if you can offer me some suggestions on where to correct these theories...thanks.
. Oh yeah...I have a SR20DET planned for my car after the suspension,and brakes are done. 100mph will only be a throttle crack away.
). Basically, weight=wheels down=better traction=better torque/horsepower coming from your wheels. Am I correct? I am sorry my vocabulary seems to be quite limited tonight, therefore I can't seem to make a...competent explanation. And about the GA I was only kidding..you get up to 100 in 2 miles!!! 
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