Ninety Fo' LS Holla! :)
So who else drives one of these white bullets?
http://vraa.gotdns.com/Pictures/2-23...%20car%203.JPG |
I certainly don't. :lol:
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You mean bread-box? After all, it has the same CdA as a loaf of bread! :D
--Dan |
You wish. It's got better cda then ur car!
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What sort of English is "Ninety Fo' LS Holla!"?
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4.3 litre lexus ?
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What I do know is that he posted a picture of a big ass land yacht. |
gosh if it wasnt for the wheel, i woulda thought it was a jetta.
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Gigdy: easy on him. He's just jibing me... this is a running joke between the two of us.
--Dan |
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I think he means 1994 LS holler!
Sounds very wiggerish to me |
Sounds like you guys are taking it way to serious. It's obviously a joke.
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[quote="666fast"]Sounds like you guys are taking it way to serious. It's obviously a joke.[/quot]
Well Im not taking it serisoly. I couldnt care less.... :lol: |
Everso: what drag coefficients did you look up? Also, what is the frontal area by which that Cd must be multiplied? I'm curious, because I've never seen the real number for the 550.
--Dan |
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BTW if the drag coefficients posted by everso are correct, I fear they measured the 550 one with the car turned in the opposite direction :D
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In the wind-tunnel a stationary ground gives models and full-size cars a flattering Cd figure - Cd being the standard term for the drag coefficient. That's just an expression of how much resistance a body will generate as it passes through the air. CdA is then the "real-world" figure for a car shape's total drag, because that's the drag coefficient multiplied by the cross-sectional area of the shape in question - so the CdA is the figure which really is significant. Some people call it the Cx, but it's the same thing.
So, if you look at the claimed figured by manufacturers, take a few things into account: 1) these numbers are actually flawed. It's like if I took a dyno in antarctica with a jet fan blowing cold air at your intake...you'll get a nice number, but it's not real. By the same measure, you need to take REAL resistance into effect, which includes physics modeling of airflow, and also a ROLLING car, not a still car. And having a higher Cx number does not mean a car is slower, it just means more power is required to keep it at a certain speed against certain wind force, rolling resistance, etc. That's why it is becomes almost exponentially harder to go from 170mph -> 180 than 160 -> 170, and so on. The faster you try to go, the more power you need. Also explains why a lot of cars fall WAY short of their claimed top numbers. What's also important is to take into account the CoP. But that'll be for another lecture. --Dan |
BTW, most of those numbers are actually false. For example, the Ferrari F40 has a claimed Cd of 0.38, whereas if you take a REAL WORLD measurement, it is actually 0.49.
--Dan |
I recall McLaren did a number of real-world tests on various cars. Perhaps I can ask a friend close to the factory for those numbers. In the meanwhile, I believe the McLaren book had some of them layed out. I will dig out my copy later on and post accordingly.
--Dan |
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Man I'm loving this place already! |
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