OK, done more test.
Graph is 4 test. Two are ?idle? done spinning the motor thru rev range without any load at all. Other two ?low load? are second gear very gentle pull thru the rev range.
Richard please resize any of my posts is necessary.
According to the data collected ?V? which is knock sensor voltage rises predictable. Rise factor can be calculated and depends on load (0-100% load). As the load increased, voltage output decreased proportionally. For the actual knock we need to look for ?spikes? in voltage output rather than voltage itself.
BTDC is ignition readout.
Test 1 ? low load
Test 2 ? idle
Test 3 ? low load
Test 4 ? idle
All test done 5-10 minutes apart.
Richard I have fully stock ECU and have no means to program it, only read.
If I will upgrade ECU software to say REVO (Europe tuner of AUDI) software I will have limited programming access, such as timing, boost, fuel. At this stage no tuner is interested in what I do therefore I cannot get program uploaded to play with. What make it worse is there are no local tuners in Australia.