Gents
Went to my third tuner and followed the suggestions from the site. We went richer and in lieu of a dyno tune, I requested a street tune. So we used an empty industrial area and focused on normal city speed driving (I was not focused on maximum HP). The car is 100% improved. To finish the tune, we will change out the 1.32 drop gear of the Graz and then complete the tune.
Interesting bit of information, at least I was not fully aware. We talk about the VSS signal a lot on the site. Many, self included, are using the Dakota Digital to send a VSS to the ECU. Tuner showed me a table where the ECU uses MPH to help it reduce throttle input when you want the motor to go to idle regardless of when you take your foot off the throttle. A no speed input to the ECU can/might cause stalling of the motor. So the ECU does need MPH, it does use it, and based on that speed it tempers the throttle adjust to reduce RPM to reach your desired idle RPM. It happens very quickly, so nothing you can hear.
Having said all that, what caught my interest is the DD system's speed reference is essentially linear. It works well, but there is an opportunity for a more robust speed signal to the ECU...aka via a relucter. Apparently the relucter is actually more dynamic in its signal to the ECU, again all at speeds beyond our hearing or seeing, but better than the DD linear feed.
Not being that smart about the correct teeth/sensor combo for the LS3, has anyone found the right combo to use for a mechanical speed reference to send to the ECU, no worries on speedo?