Det Cans
#1
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Made myself some today from a peice of copper pipe with a pushfit plumbing end on, a hole drilled through the pushfit end and a 6mm o/d airline hose running to an old set or ear defenders. I havn't tried them on the car yet, but when i put them against things that vibrate or make noise i can bearly hear anything... Is this right? How loud will they be in the car?
#2
Balls Deep!
iTrader: (4)
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This is how I made mine Rog...
![](http://i413.photobucket.com/albums/pp217/Th3blueroom/DSC_0829.jpg)
![](http://i413.photobucket.com/albums/pp217/Th3blueroom/DSC_0832.jpg)
![](http://i413.photobucket.com/albums/pp217/Th3blueroom/DSC_0831.jpg)
![](http://i413.photobucket.com/albums/pp217/Th3blueroom/DSC_0833.jpg)
If you've not used them before you have to kind of 'tune' your ear to what your hearing/listening for, you'll hear the valve train mostly and the best way I can describe Det is it sounds like someone clicking a pen on and off with their thumb, the faster you hear the clicks the worse it's detonating, this is slightly louder and higher pitched than everything else you hear.
![](http://i413.photobucket.com/albums/pp217/Th3blueroom/DSC_0829.jpg)
![](http://i413.photobucket.com/albums/pp217/Th3blueroom/DSC_0832.jpg)
![](http://i413.photobucket.com/albums/pp217/Th3blueroom/DSC_0831.jpg)
![](http://i413.photobucket.com/albums/pp217/Th3blueroom/DSC_0833.jpg)
If you've not used them before you have to kind of 'tune' your ear to what your hearing/listening for, you'll hear the valve train mostly and the best way I can describe Det is it sounds like someone clicking a pen on and off with their thumb, the faster you hear the clicks the worse it's detonating, this is slightly louder and higher pitched than everything else you hear.
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#11
PassionFord Post Whore!!
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A car radio would do that Karlos, i think the voltage output from the knock sensor would be roughly equivalent to radio signal, which a car stereo amplifies fine.
The more important part is what type of knock sensor to use. There are two types each giving very different results.
It wouldn't be ideal though, proper signal filtering makes hearing light det sooo much easier.
Rob,
The more important part is what type of knock sensor to use. There are two types each giving very different results.
It wouldn't be ideal though, proper signal filtering makes hearing light det sooo much easier.
Rob,
#12
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Hey Rob, theres no need for that...
I can't do that vent out malarky
- mmm I'll find someway of doing it, gonna try my smaller hose again.
I bolted to an exhaust manifold stud, but i'd rather go inlet mani tbh as its a shorter length for the hose and sound to travel.
I can't do that vent out malarky
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I bolted to an exhaust manifold stud, but i'd rather go inlet mani tbh as its a shorter length for the hose and sound to travel.
#13
PassionFord Post Whore!!
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Knock sensor output (is a googled) 3-500mV so i take back the radio voltage comment (which is much much smaller), however a cd input on a car stereo could manage an input of 500mV i think, most amplifiers have an input sensitivity of around 0.2-2V (ish), you definitely want to be listening with head phones rather than car speakers though!
Rob,
Rob,
Last edited by Rob_DOHC; 16-12-2011 at 10:35 AM.
#16
Balls Deep!
iTrader: (4)
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Knock sensor output (is a googled) 3-500mV so i take back the radio voltage comment (which is much much smaller), however a cd input on a car stereo could manage an input of 500mV i think, most amplifiers have an input sensitivity of around 0.2-2V (ish), you definitely want to be listening with head phones rather than car speakers though!
Rob,
Rob,
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