Yes, and remember that it is the square of the difference. So three times faster is nine times as much drag.
And, the 1LE adds significant aero designed for more downforce, causing more drag.
Oh, and by the way, the upcoming Mustang PP2 package adds some aero for increased downforce. Here is a quote from Ford's website:
"Critical to the success of the package is improved aerodynamics scores, which the team achieved by adding larger and lower front splitter and redesigned rear spoiler.
Gesek said the after-hours approach team members took to developing the Mustang GT Performance Pack Level 2 was so much fun because they set out to create their dream car.
“Our targets were aggressive,” he said, “and we nailed them.”
Using the splitter from the famed Mustang Boss 302 Laguna Seca as a benchmark, Mustang engineers attached the piece to the underside of the front to fan out as much as 3 inches around the corners of the Mustang GT. It creates about 24 pounds of downforce at 80 mph, helping give the car its exceptional grip. To balance the downforce, a subtle, redesigned rear spoiler stretches across the decklid."
(source link:
http://performance.ford.com/enthusia...ce-pack-2.html)
These aero changes will not only increase downforce, they will increase drag.
So, what do you guys think will happen to the trap speed on a 1 mile course with these new changes? If you guessed a lower trap speed, you are correct.