Cylinder Tuning
Yes, it is possible to read and to log all cylinders simultaneously. In fact, this is very common in racing applications. I believe that the Edelbrock Qwick Data system has this capability as well as others. I have often seen advertisements for these products in National Dragster (NHRA Publication). You could also obtain the necessary equipment from an industrial supplier, such as Granger or McMaster-Carr. However, these systems can get expensive, depending upon what features you desire. Good luck.