Our cars are tiny the cross sectional area is very small. Only a few things act like parachutes on our cars compared to most others. With a front mount and a reverse scoop hood, it's nearly cut by 1/4. These things have so little wind resistance it's amazing.
Drive an rx7, let off the gas at about 70 or 80 and see how long it takes you to slow down to 60. Then try it in any other car.
As for the LSD, it's a pretty strong stock LSD. If you like your 240, you'll wet yourself with an FC or an FD respectively. I've never driven a nissan that I liked more than an rx7.