The Fans can see the heads we take off, but without knowing the combustion chamber volume, the size of the jets in the fuel nozzles, and the spring pressure being run on that particular set of heads, it won't tell them anything of value.
Then there are a lot of other variables which affect the set-up. Which unless you are experienced with tuning a Fuel car, and know every single variable going into the car for a run, knowing one or two aspects of the set-up through close, knowledgeable observation, won't help the casual spectator.
Then there's the fact that even if two cars are set-up exactly the same, there's is no guarantee they will react the same. They all have their own unique personality.
The only way to determine what a car likes, is lots of runs, and gathering the data from every run. So you can make more informed decisions about what might work for a given set of track and atmospheric conditions.
If anyone is interested in seeing the action in the pits and on-track up close, we're at Route 66 Raceway in Chicago this weekend. The Fuel cars are scheduled to run at 5:15 and 8:00 today. 5:00 and 8:00 tomorrow.