I use the K&N fuel monitor, it's okay but doesn't store live data though. They're a good tool to tune SU carbs through the rev range and under driving conditions.
Ok thats few ideas. Shame on the logworks forum being closed. So the main need is the Humber engine used a cox atmos carb these are rare so im in the dark trying to use a 1.25inch su. So trying to get the best needle. Hence the data logging, so I can sit down and compare results in the evening.
In a car you have the benefit of being able to plonk a laptop on the seat, so any wideband that has logging software will do, it doesn't need to be an actual datalogger.