Knock Indicator?
10-06-2004, 02:42 AM
#16
Race Director
No the Link Knock Block has a 3.5 plug fitting so you can plug in any headphones to listen for knock. Which is very obvious, I tried one out the other day, picking one up next week or this weekend, but i have to get my new clutch setup from SFR here before I can tune. You can configure the sensitivity of the knock with the unit itself. Its very impressive I am going to mount an extension into a dash blank so I can hide it all and plug it into the socket entension. It is a very cheap kit to! The gauge is pricey, but its flawless in terms of disply and quality.
rennlist+beer. doh
10-06-2004, 11:24 AM
#18
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Originally Posted by Tom M'Guinn
Would this indicator reach its own conclusions about when the engine is knocking, or would it flag those events that the KLR/DME deems a "knock" for purpose of the ignition timing? I think there are options out there for the former, but the latter would be unique I believe.
Good question. The KLR filters the signal from the knock sensor then decides when knock is taking place, as well as the intensity/duration of the knock. Based on this information, it retards timing...
I am aware that there are many knock sensing systems out there. However Porsche did lots of work on the knock filtering mechanism Unique the 951. I am not inventing the wheel here, I'm using the work that Porsche did and adding to it (displaying it).
The factory has a preset value it uses to retard the timing. We will be testing the new DME/KLR code in order to change the amount of degrees the timing gets retarded in case there is knock.
