I have had a Zeitronix ZT2 in my Spider for about 5 years and I have posted many AFR charts from it in various threads. It has several extra inputs for rpm, EGT and some for linear voltage sensors. I always log rpm and AFR and for a while I logged EGT. My wideband sender is just after the final merge from the headers. I have replaced one sensor during my time of ownership.
I installed a Zeitronix ZT3 in my GTV6 with Megasquirt that I recently sold. When I first installed it I still had Bosch L-Jet engine management with the wideband sensor in the bung for the original narrowband. The ZT3 sent an emulated narrowband signal to the L-Jet computer. The ZT3 does not have the extra inputs for rpm etc.
IMO, rpm logging is essential for engine tuning and I would not consider a Wideband without it unless it was used with Megasquirt or similar which has its own data logger.
If you plan to dyno your motor then you can save a lot of time and money at the dyno by sorting out the carbs or fuel injection with the wideband ahead of time. In my experience there should be no need to tune AFR on the dyno and you can concentrate on tuning ignition timing, cam timing, etc.
I have the Zeitronix in the car at all times and it is very useful if anything feels a little different in the performance or driveability or fuel consumption.
76 Suzuki GT500
2011 Jaguar XKR
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