Lazeum Posted April 30, 2010 Share Posted April 30, 2010 (edited) I haven't found anything on the board regarding the DIY knock sensor (detcan?). I was wondering why no one has made a sensor like this? Since I don't know and I'm in tuning stage, I've decided to do my own. So here is my "how to". I've made the tool but I did not have the opportunity to use it yet. I'll be glad to hear feedback from those who did it. The principle for those who did not know this process is to get a copper tube attached to the motor that would vibrate. This would make the air inside to vibrate as well (obviously then everything in the "sensor" has to be air tight). With some ear protector headsets, you can listen to the soundwaves thanks to some tubing. Tubing has to be long enough to go from the engine bay to the cabin. I wouldn't advice to drive the car AND to have the headset on at the same time... Here is the list of parts required: - Some piece of copper tube (S shape makes it easy to work with) - Some kind of tube connector in brass or other type of material. - Some hoses (~2 meters) - A T-joint to hold hoses together - ear protector headset - some clamps + basic tools I've started with the copper pipe, I've made it fit inside the connector. I've cut the pipe, rolled it with some pliers and tight it up by torquing it inside the thread of the connector. I've flattened the other side with a vice, once... ....then Twice to get a good seal. I've used some solder with a torche to seal the pipe. you cannot see it on the following pictures but you'll have to drill a hole to get a bolt thru it to attach it to the motor with a bolt (see other picture below to see the hole). Next step is go get some holes drilled into the headset and stick hoses inside cut a the right length. I've added some silicone on hoses. I had some available so why not... I don't think this is something very new; some other "How to" are available on the net but it might be something usefull to get as soon as you mess up with timing. According to some tuner friends, it is much easier, more responsive and more accurate than most of the expensive electronic ones you'll find online. On SR, they don't even rely on stock sensor, they are only relying on this DIY one. So why not giving it a try! Since I don't know what to expect as far as noise to spot (I have a rough idea though), if some have also some good comments, I'm also in! We might also be able to ear noise rockers, bad bearings, etc.... Edited April 30, 2010 by Lazeum Quote Link to comment Share on other sites More sharing options...
xonix_digital Posted April 30, 2010 Share Posted April 30, 2010 Where on the motor would you attach this? I think I'm going to try it! Quote Link to comment Share on other sites More sharing options...
Lazeum Posted April 30, 2010 Author Share Posted April 30, 2010 (edited) Most likely next to cylinder 5 & 6 On the passenger side, you have the heater hose support for instance on the block or on knock sensor location (I have a P79 ). It requires however a big bolt (M14?) so a fairly large piece of pipe (to drill Ø14 hole) might have to be used for this one. People also clamp it on support to lift the engine, it seems to work also... Edited April 30, 2010 by Lazeum Quote Link to comment Share on other sites More sharing options...
didier Posted May 1, 2010 Share Posted May 1, 2010 Most likely next to cylinder 5 & 6 On the passenger side, you have the heater hose support for instance on the block or on knock sensor location (I have a P79 ). It requires however a big bolt (M14?) so a fairly large piece of pipe (to drill Ø14 hole) might have to be used for this one. People also clamp it on support to lift the engine, it seems to work also... Will you please take a photo of your face with the headset ? I WANNA LAUGH !!! Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted May 2, 2010 Share Posted May 2, 2010 http://forums.hybridz.org/index.php?/topic/43865-tutorial-the-best-value-detonation-detectors-on-the-planet/ Great minds.. (though the idea wasn't mine) Dave Quote Link to comment Share on other sites More sharing options...
Lazeum Posted May 2, 2010 Author Share Posted May 2, 2010  I did not see it when I was looking for one... Anyway mine is better Quote Link to comment Share on other sites More sharing options...
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