what difference do you think 5 or even 10 psi would make in raising the rear of the car, if at all? so yeah, dumb questionI don't see the problem with the question. Raising the back of the car would shift the weight in the opposite direct: the front. Obviously when you accelerate the weight shifts to the back and off the drive wheels, but there's nothing you can do about that in a front wheel drive car. That's a different issue entirely.
Why wouldn't raising the back, if anything, at least lessen this shift.