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RX7 FD With Bosch donut knock sensor configuration and monitoring

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Hello there, I didnt found any specific information for this.

I have a bosch donut type knock sensor on my rx7 fd, I tried to configure it, but im not sur of the informations I enterred.

The second question is how to monitor it ?

I logged a session with the car driving around the neighbourhood but to be honnest, I don't understand much, being used to an Apexi Power FC display type with a gauge of knock percentage.

I join two screenshots here

http://harodarwin.free.fr/HPA/Capture.PNG

http://harodarwin.free.fr/HPA/Settings.PNG

https://www.hpacademy.com/previous-webinars/049-setting-up-knock-control-link-g4-vipec/

Typically the 4KHz narrowband channel works best for a rotary. Gain would normally be set much lower than you have - usually more like 1 or 2.

Good to know, i'll look this Webinar.

I have to set it on 4KHz even if I use a Bosch Donut Knock Sensor ? ( I replaced the Oem by this one )

http://harodarwin.free.fr/HPA/Knock.jpg

Thanks a lot !

The Bosch donut sensors are wideband, so they will operate on any combustion chamber volume and knock frequency.

The key point is that the knock frequency is dependant on the size of the combustion chamber, and not the sensor you are using.

Ok, I totally understand now, many thanks to you two :)

So, I watched the Webinar 049 concerning the Knock, great video.

I have few questions, my car is still on basemap, so I have not the possibility to street test the car to listen and definite a "normal engine noise".

I don't know if it's possible, but I ask to you Adam if you can give me some number to enter on the Knock Target Table it will be verry helpfull...

The second question, my Knock Target Table looks like a 3D table with TP% on Y axis and Engine Speed on the X, if I want a similar table like on the video, I just have to set the Y Axis on "None" ?

Thanks :)

I don't know if it's possible, but I ask to you Adam if you can give me some number to enter on the Knock Target Table it will be verry helpfull...

Unfortunately no, every engine is different and you will need to build your own target table. There are too many factors that effect the noise signature of an engine, chassis, engine mount stiffness, exhaust system and many other factors will affect how much "noise" the knock sensor sees.

The second question, my Knock Target Table looks like a 3D table with TP% on Y axis and Engine Speed on the X, if I want a similar table like on the video, I just have to set the Y Axis on "None" ?

Yes, you can turn off one axis to make it easier to tune a basic noise target.

Ok, thanks for your replys :)