Spoiler angle

[perfconn]

Sorry 700 but you are wrong.The spoilers on pro stocks are laid all the way down to create down force without creating drag.If they created lift they would not be able to run over 200mph without without the back end lifting off the ground.

[Egoracing]

Sorry 700 but you are wrong.The spoilers on pro stocks are laid all the way down to create down force without creating drag.If they created lift they would not be able to run over 200mph without without the back end lifting off the ground.

Correct, the flat spoiler in conjunction with the rear of the car creates a huge low pressure area under the spoiler and generates a TON of down force.

[C10]

EXACTLY!, the flat spoiler on a PS car also stabilizes the car from swaying by taking away any high pressure from under the car at the rear.

[Flyin Iowan]

Not to hijack but what about air under the car. I remember carl edwards winning a race and had his oil tank lid off alowing air from under the car escape. something like 200lbs of force(i know thats at 200mph) But would something such as a hole or an access panel being left open do anything????

[billetbirdcage]

Not to hijack but what about air under the car. I remember carl edwards winning a race and had his oil tank lid off alowing air from under the car escape. something like 200lbs of force(i know thats at 200mph) But would something such as a hole or an access panel being left open do anything????

It's completely different with a LM, for one major reason: The nose of the car isn't sealed off the the ground like an asphalt car can/will be. Since the nose of a LM isn't really ever sealed to the ground, they can't create the high low pressure area under the car. I know during a test on a dirt LM the down-force really didn't change much with the car at static ride height verses with the car at close to 20 degrees of yaw (left side up). If the nose was in fact sealed to the track, raising the left side should have unsealed the nose and significantly reduced the down-force, but it didn't.

Things like you mentioned can help, but whether if helps or not is dependent of several factors and your dealing with one car that has a windshield and a body that is contoured where the air follows the outside body without obstructions in the way. Where a LM has no windshield and then still has a roof and a drivers mud deflector and driver's head/helmet, so there are all kinds of things that will/can cause turbulence and create low and high pressure areas along the top side of the LM body. It's just not that cut and dry, to say this would work on a car so different to a cup car