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oldcorollas Forums Junkie Location: Kita-Ku, Sapporo, Japan Registered: January 2003	Re: tuning ignition?? Fri, 28 January 2005 14:15 what you are forgetting is that a 'knock sensor' to be of any real value, must be tuned specifically to a certain engine, so that the extraneous mechanical noise is filtered out, and only the actual ringing of the cylinder immediately after firing (or before in the case of detonation) is detected and reported as knock. it is a very complex problem requiring not only a bandpass filter aroudn the knock frequency (which you must determine), but you also need to restrict the detection window to a specific part of the crank rotation. the LED and other cheap meters that are sold are not always very effective, unless the original sensor for your motor already is properly mechanically filtered. intercepting the ECU's interpretation is one way, but even OEM knock detection algorithms leave a fair bit to be desired there are a number of very good papers on the subject floating around the net, and even a few theses, so i'll leave it at that... what is more promising is 'ion sensing' of cylinders via the spark plugs.. better to stop pinging even before it occurs.. but again, thats a google effort Cya, Stewart [Report message to a moderator]

	Subject	Poster	Date
	tuning ignition??	oldcorollas	Thu, 27 January 2005 05:55
	Re: tuning ignition??	Chris Davey	Thu, 27 January 2005 06:10
	Re: tuning ignition??	TurboRA28	Thu, 27 January 2005 06:14
	Re: tuning ignition??	oldcorollas	Thu, 27 January 2005 06:22
	Re: tuning ignition??	Joshstix	Thu, 27 January 2005 07:01
	Re: tuning ignition??	Kyosho	Thu, 27 January 2005 07:41
	Re: tuning ignition??	oldcorollas	Thu, 27 January 2005 07:47
	Re: tuning ignition??	Chris Davey	Thu, 27 January 2005 07:54
	Re: tuning ignition??	Kyosho	Thu, 27 January 2005 07:54
	Re: tuning ignition??	CrUZsida	Thu, 27 January 2005 07:57
	Re: tuning ignition??	Chris Davey	Thu, 27 January 2005 09:18
	Re: tuning ignition??	CrUZsida	Thu, 27 January 2005 10:46
	Re: tuning ignition??	oldcorollas	Thu, 27 January 2005 10:05
	Re: tuning ignition??	Kyosho	Thu, 27 January 2005 09:38
	Re: tuning ignition??	Kyosho	Thu, 27 January 2005 09:48
	Re: tuning ignition??	Kyosho	Thu, 27 January 2005 10:43
	Re: tuning ignition??	Kyosho	Thu, 27 January 2005 10:48
	Re: tuning ignition??	Kyosho	Thu, 27 January 2005 10:56
	Re: tuning ignition??	oldcorollas	Thu, 27 January 2005 12:18
	Re: tuning ignition??	oldcorollas	Thu, 27 January 2005 12:58
	Re: tuning ignition??	oldcorollas	Thu, 27 January 2005 13:13
	Re: tuning ignition??	TurboRA28	Thu, 27 January 2005 22:20
	Re: tuning ignition??	Soarer	Thu, 27 January 2005 23:34
	Re: tuning ignition??	Chris Davey	Fri, 28 January 2005 00:49
	Re: tuning ignition??	quest	Fri, 28 January 2005 14:06
	Re: tuning ignition??	oldcorollas	Fri, 28 January 2005 14:15
	Re: tuning ignition??	MS-75	Fri, 28 January 2005 04:11
	Re: tuning ignition??	Chris Davey	Fri, 28 January 2005 04:43
	Re: tuning ignition??	Kyosho	Fri, 28 January 2005 07:15
	Re: tuning ignition??	Kyosho	Fri, 28 January 2005 07:17
	Re: tuning ignition??	MS-75	Fri, 28 January 2005 22:43
	Re: tuning ignition??	oldcorollas	Thu, 17 March 2005 12:40

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