[Tom Goldman]

The data you gain will eliminate guesswork and reliance on trackside " you spun the tires " observations .
Just having the basics of engine ,driveshaft and O2 will help save time and money by providing solid visual data graphs that can be overlaid to compare good and bad runs and make informed shock and suspension adjustments.
Real world ,on the track O2 data is very helpful in finding the tuneup that not only can pick up ET for a heads up run ,but also find the perfect bracket mode tuneup that delivers consistency.
Additional channels like oil and fuel pressure can also help catch problems before they result in destruction