Levon Luther Posted October 23, 2012 Report Share Posted October 23, 2012 Howdy everybody - pretty new to link, and will be tinkering with this platform on my 2004 STi. I noticed a few people on here got a bosch knock sensor when they purchase either the ECU, or the Knock Block. I just got both of them last week and now I have to buy a knock sensor after spending that much coin?? I noticed we need the bosch sensor, but which model number? I was looking around on both NASIOC and here and couldn't find which one I needed that would work. I found: http://www.amazon.com/gp/product/B001CO2X5I/ref=gno_cart_title_2 I'm not certain that is the right one, looking for some advice. Thanks! Quote Link to comment Share on other sites More sharing options...
Scott Posted October 24, 2012 Report Share Posted October 24, 2012 Hi Levon, I have answered you by email, but will post here also for other forum users. The knock block is happy to work with the factory Subaru sensor. It will be a second harmonic sensor so frequency will be in the 12-13Khz range The standard subaru knock sensor will work well with the knock block and your tuner will be able to hear knock fine, there is no need to use a bosch one. Cheers, Scott Quote Link to comment Share on other sites More sharing options...
Levon Luther Posted November 9, 2012 Author Report Share Posted November 9, 2012 Thank you much scott. I appreciate it. A member from the subaru forums contacted me and suggested using the stock sensor for the knock block to listen to it, but then use a bosch sensor for the ECU to 'listen' to for some double protection. I'm still am not 100% sure how IÂ want to wire this up, or even 100% what I'd send from the knock block to the ECU. I'm using a Link plug n play for the V10 Suby. Quote Link to comment Share on other sites More sharing options...
Scott Posted November 9, 2012 Report Share Posted November 9, 2012 Hi Levon, You will only need the one sensor, you can use the factory subaru sensor or a bosch one. The normal setup for a knock block in a permanent install is to have the knock block detecting knock, it will then feed this back to the ECU on a spare digital input. The ECU can then be setup to retard the ignition timing to stop the detonation. In addition the ECU also needs to send a signal to the knock block so that the knockblock knows when to listen. This is called the 'knock window' and you will require a spare Auxiliary output on your ECU for this. So in summary your ECU will require a spare Digital Input and a spare Auxiliary Output in order to work with the knock block. There is a fair bit of learning that needs to go on to understand how the system work, but it is worthwhile. Cheers, Scott Quote Link to comment Share on other sites More sharing options...
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