I have the single sensor FAST system. It has a data logger with on-screen playback. I used it a lot in my nitrous days when ever I needed to add more nitrous to go faster. It's pricy but then I needed to stay on top of not being too lean. Now days with no nitrous I turn it on every so often down the 1/4 mile to keep an eye on things.

  Vic Correnti

Looking for one for my T Bird for carb jetting purposes. Lots of options. What are you people using ?