Think of it this way, if you were traveling down the highway at 60 mph with your windows down, there would be a lot of turbulance and pressure inside the car. If you had a 4'; diameter access panel on the back floorboard and you opened it up revealing the ground below, the turbulance and pressure would have a place to escape via that hole. That's the simple explanation.
In a stock car at 190 mph that makes a huge difference. It doesn't actually create more downforce, what it does is reduce lift. IE air under the car trying to push up.
Your passenger car has a ';Wet Sump'; oiling system. In other words, the motor oil is stored inside the engine in the oil pan and has an internal oil pump. A Nascar engine has a ';Dry Sump'; oiling system meaning there is no oil strored inside the engine, instead it's stored in a tank where the back seat would normally be. They hold atleast 15 quarts. The engine has an external, belt driven oil pump that pumps the oil from the tank, through the engine and back to the tank.
The tank is mounted up in the car through the bottom and the bottom of the tank is open to the track/ground in the event it should rupture or catch fire then it would release down to the ground instead of into the interior with the driver.
Now, There is a big sheetmetal box that covers and seals the oil tank completely from the interior to gaurd the driver from said rupture or fire and also from the heat of the oil during a race.
There is a small access panel on the top of that big sheetmetal cover to allow access to the oil tank cap where they add oil.
The small access panel on the big cover is what was missing on Edwards car. Since there's space around the oil tank and big cover which is open to the ground, that's where the pressure release would happen and were one might gain an advantage.
Hope this makes since.Carl Edwards Oil Pan Cover Thing? Will someone explain to me?
The buck-toothed thug was cheating again. He drives a Ford,how else is he going to have a chance?
It allowed air into the car giving it more downforce. Toyota said yesterday that they had done a test with the cover off and it gave them something like 140Ib of downforce, which is a lot
Check this out, it is a pretty good article about it.
The cover was left off and that created more downforce which made the car have more grip and could run faster in the corners!!!!!!
With the lid off it helps create downforce=speed.
TO djskooby with all the engineering put into these cot`s why hasn`t anyone used lockwashers on the bolts I mean you guys are all mechanics isn`t it time to use your heads for more than just hatracks?
missing the oil cap creates more downforce on the car which in turn creates more grip from the tires. It also creates 21%more horsepower because more air creates more power. I am a dedicated carl edwards fan and I firmly believe that nascar has a flaw in the design of their car of today because other drivers in the daytona 500 were fined and docked points for loose oil caps. Jack rousch stated that vibrations will make bolts come loose and that is true. Other drivers are arguing that point but keep in mind that they are drivers and not mechanics. I am a mechanic myself and I know for a fact that bolts do come loose from vibration. I'm sure that if they search LV motor speedways track they will find his bolt/cap. I suggest that they lift all fines and suspensions and reinstate his points. Nascar inspectors and officials tend to overthink. they can't see that there is an obvious problem with the cars that they designed. also f you kingpin. carl edwards and his crew are good non cheating honest people.
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