How To Use Knock Sensing on rusEFI

[@SeanDoll]

lol i love the music you used! nostalgia .

[@alphagenperformance]

Very informative! Good video! The Dreamscape soundtrack in the back isn’t too bad either haha Classic!

[@1magnit]

You need to learn up on knock. It doesn't have a set frequency and it's not determined by bore size. It's all a lie. The bore size tells you the lowest frequency you're going to detect. Not the knock frequency nor the frequency you want to detect nor the one which has the best signal to noise ratio. Actual knock frequencies change with load and RPM. Mitsubishi use resonant sensors, So does GM and probably Hyundai too. They're not microphones and the output from them is a single frequency with no relationship to any sort of knock frequency.

[@alphaspeedpr]

Why don't you go to the rusefi forums and talk about that with a few people who are probably smarter than me?

[@1magnit]

@@alphaspeedpr You're making the claim that the knock sensing works but there's zero chance that it does and you have obviously never tested it. Got to start with a scope on the output of the sensor instead of guessing.

[@wlasov]

Hi! I installed RusEFI on an engine with a high compression ratio(>11.5). I have to say that the formula for frequency really works! The soft detects knocks such on resonance sensor-based systems. On an OEM Bosch ECU freq a bit depends on RPM (minimal correction) But note that I'm using the raw calculated frequency without multiplication to 2 🙂

[@1magnit]

@@wlasov Resonant sensors don't detect frequency. They detect the initial shock and output a fixed frequency determined by the sensor internals.