Knock Sensors are a double edge sword, they are too sensitive at stock settings. triggered too easily buy internal noises.
but come in handy when "pro tuner" wants to run timing over 24*(5.7s) and 26/28* (OEM6.4) a good tune and good fuel eliminates the need for KR, which is why I don't tune E-85 for street applications too many variables, too much of a quality swing , it can be 53% or it could be 83% or any where in-between.
that's a wiseco piston on E85 in a Eagle Headed .030 ,4.05 stroke 5.7 on 12lbs of boost, some where in the 11.to 1 range., KR was reduced to 3.5v across all 8 , but missfire detection was set to 6k RPMs, timing was limited to 24^ in WOT but the Max MBT tables were left stock,
So what happens is , when the ECU gets told there's too much timing for the crap fuel we are running, the ECU allows the KR function to pull Timing, but the Driver is telling the ECU I want 75-100% power(TQ/Airflow demand) , so the ECU will over ride the KR function and run timing up to MAX MBT table values for that KPA reading....why you might ask, because the KR function 'left the WOT table, driver's foot is still planted against the fire wall, and all WOT tables are opend....it will not go back to PT spark/fueling tables till the Throttle demand is below threshold........
so the Programs next protocol is go to MBT max table.
Now Misfire detection over rides TQ/Airflow demand and reduces timing to max retard table depending on KR sensor feed back....... then it will pull fuel to keep from fouling plugs and causing a stall situation.......
.....which is why all "speed reduction" is based on Timing and not fuel.