ustolemyname??stevieturbo

iTrader: (1)

The knocklink lights up when detonation is detected. The knock sensor causes the ecu to retard the ign timing when det/pinking is detected. So, will it light up when the sensor is detecting knock that would cause the ecu to retard the timing, and therefore preventing it.
Which would be more sensitive? The ecu, or the knocklink?? and if it is the knocklink, would it show up the knocking, that is causing the ecu to retard.
Or is it a dumb question?

dowser

Are you talking about sharing the same sensor? Bad idea! Assuming they're different sensors, then they may well have different sensitivities due to location and build - I wouldn't necessarily expect them to correlate except when things got v.bad

If you had access to see what the ecu was doing, you could probably use the knocklink sensitivity to get it as close as poss?

Knock correction works as you suggest - a car I'd been asked to remap a bit too close to the edge () got a positive knock signal on a poorly cooled rolling road recently. DeltaDash showed the knock signal active, then the correction afterwards (pulled 3 degrees for another 500rpm).

Richard

ustolemyname??stevieturbo

iTrader: (1)

Not talking about sharing the same sensor.
I was just wondering if you would actually see the knock, that is causing the ecu to retard, or would the ecu retard, before the knocklink detects.
So the only knocking you would see, is once it has gone beyond the ecu's ability to retard?
Im confusing myself, with what is probably a daft question.
Det should not happen, as the ecu retards to prevent. But the ecu only retards when the sensor tells it that it is happening. Does this initial det. that causes the ecu to retard show up on the knocklink??? or only after it has gone beyond the ecu's control?

dowser

Imagine a freshly reset ecu - it will only retard once it's heard knock (a positive knock signal). Your knocklink will see this. Next time though, the ecu will auto retard around this point, so knocklink will see nothing.

All of this ignores the ambiguous ecu's way of applying knock correction just for the hell of it....even after an ecu reset and no positive knock signal. Which is why some people disable the factory knock circuit

Richard