Australian GT Championship at Oran Park

I went out to Oran Park yesterday to watch a good mate of mine (and also one of our Queensland instructors), Damien Flack, compete in the second round of the Australian GT Championship. It was his first race in a Porsche GT3 and also his first race at Oran Park. Damien finished a very credible 5th outright and 3rd in the Porsche Drivers Challenge.
I tried a number of panning shots over the course of the day. Like Stubbsy said in an earlier post, it's bloody difficult.
Some were blurry at the front, but reasonably sharp at the back of the car, like this shot of Greg Cricks awesome Dodge Viper
Others were sharp across the whole image, but I cut off parts of the car, which I find distracting, like this one of Damien lapping a back-marker
and this one...
This one's a complete photochop of Damiens' car slowly making its way to the starting line. I added a motion blur in PS and then painted a mask over the car. The almost stationary wheels give the game away...
All taken with the kit lens. C & C welcome. I'd really like to hear from the motorsport photography gurus here how they get such wonderful, close up panned shots.
I tried a number of panning shots over the course of the day. Like Stubbsy said in an earlier post, it's bloody difficult.
Some were blurry at the front, but reasonably sharp at the back of the car, like this shot of Greg Cricks awesome Dodge Viper

Others were sharp across the whole image, but I cut off parts of the car, which I find distracting, like this one of Damien lapping a back-marker

and this one...

This one's a complete photochop of Damiens' car slowly making its way to the starting line. I added a motion blur in PS and then painted a mask over the car. The almost stationary wheels give the game away...

All taken with the kit lens. C & C welcome. I'd really like to hear from the motorsport photography gurus here how they get such wonderful, close up panned shots.