I take it that is Laguna Seca (Mazda Raceway).
As a driver, other than the 'corkscrew' (turn 8, 8a) I never cared much for that track.
I agree they are cropped a bit to tight top to bottom, but are OK left to right in that there is a bit of room in front of the cars giving them space to 'move'.
I get the impression they are all somewhat under exposed, and a bit blue (white balance).
The quartering shots, like 1, 2, & 5, that show some of the front of the car are more interesting.
Without credentials it's hard to be in the best shooting spots, like shooting at the angle from corner exit track out back towards the corner entry braking zone and shooting a burst as the car negotiates a corner.
As mentioned using a slower shutter speed and panning blurs the background more and lets the car's wheel blur more, both helping to convey the sense of speed.
I corrected the white balance and exposure, boosted the mid tone contrast a bit, bumped the Vibrance a tad, sharpened just the car a bit, and added a narrow black border.