I dont think theres anything much i can say after that
I think you already have a good idea whats wrong
And I'm not sure I should be commenting on a car with comp fab exhausts
Theres is something lacking in the shots that I just cant put my finger on. I thought it was the jpeg quality setting, but you've got it set to 8, which should be good enough.. Does your host reduce the jpeg quality in anyway (i know fotopic does).
As Mike says, auto white balance is your best bet. From what i remember about lightroom it also has an excellent auto white balance setting that you can use on the RAW shots should the camera get it wrong.
I normally use Aperture for my post processing, but its an Apple only program so not much use to you. I did have to use lightroom for a while, and i thought it sharpening properties were really good.
now for the photos (remembering there is no right or wrong, just a humble opinion)
1) This one needs a little sharpening to make it really work. I also think that a slower shutter speed would have made it more exciting. I would also prefer a lower down point of view, but if this is the bomb hole i dont think you could get much lower there. There is something about the blue of the car that made me think the jpeg quality was low. The gradient between the shades of blue looks quite sharp. What I mean is that where light blue and dark blue meet its noticeable rather than a smooth transition.
2) Would like to have seen the jag in the frame too. Dont be scared to use a different focus point other than centre. I think this shot would have been better if the main car was still the focal point, but in the left hand bottom third of the frame. Maybe a slower shutter speed on this one too to blur the jag and keep the lancia in focus. Or even a larger aperture to give a shallow DOF and blur the Jag. But you would need to make sure the Lancia wheels were hidden if the wide aperture gave you too fast shutter speed. Take advantage of the low light as it can let you use wide aperture, and slow shutter speed.
3) A lot of the comments on number 2 can be applied to number 3. The cropped cars are a bit distracting in this one.
4) As Mike says, this one has an orange tinge to it. Comments on number 1 also apply to this one
5) Good shot, but spoiled by the roll hoop being chopped off on the second car. The reds also seem to suffer from the same prob as the blues in shot 1. Focus point in bottom third of the frame would have improved this shot IMHO
6 + 7) Congrats to your brother! Must have been the exhaust that gave him the extra power
If 7 had both cars like 6, and had the same composition without the barrier and without the orange marshalls it would be an excellent shot. But that would prob be impossible, as zooming out to get both cars would mean you would have trouble not getting the barrier. Although its not to everyones taste, this is when i sometimes find tilting the camera and getting an angle comes in handy. If you'd tilted the camera about 15 degrees you could have lost the barrier from the shot. Also a shame to have chopped off a tiny bit of the other cars front wing.
Having said that, number 7 is my fave shot. nice colours, nice shutter speed.
8) a nice shot that i think could have been improved by having the car somewhere other than the centre. Putting it in the left third (or even bottom let third) of the frame would have given you more of the trail of spray.
If you like, send me the RAW file of the first TVR, and the F3 car the same corner and I'll process them through Aperture and see if it does a better job than Lightroom.
