A couple of weeks ago I took some photos at one of the local rallies, but due to the position I had to take, I ended up shooting towards the sun. As a result, my shots ended up as per the example below. As I was shooting in RAW format, I was able to post-process the image enough such that the foreground was brighter. What I'm interested in knowing is if I can use a flash in this situation so that I can expose for the background and get some great contrast in the clouds, but still expose the car properly such that it is vivid and really stands out? My biggest concern is if the recycle time of the flash (for example SB-600/800) is going to be fast enough that I can still take a rapid series of shots (in this example 3 shots at 1/1000 within a second or two - they were travelling at about 200km/hr over the jump). Other than moving to the other side of the road so that I wasn't shooting into the sun (not really an option in this case), are there any other methods I could have used?