OK... I've driven an auto 33 with a "plugin" ( ) Wolf and the auto doesn't know when to change gears, and when it does change, it bangs into gear... I didn't get a chance to test it completly, but it's doesn't "feel" right at all in my opinion... My car exhibits none of those symptoms...
I suspect your theory is correct though... When wiring in the SITC, you cut the wires from the CAS, route the signal to the SITC device, and then back to the ECU... So as you say, your only adding or subtracting small amounts to / from the original readings... Not controlling the timing completly as you would with a full ECU...
I agree about the interpolation algorithms too... It's not too hard to confuse the poor thing... In the end, the SITC is just a basic sensor bender...
Thanks for the advice SK...