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MS-75 Regular Location: Adelaide Registered: June 2002	Re: tuning ignition?? Fri, 28 January 2005 22:43 Exactly Stewart. When a factory knock sensor is tuned up they do it one cylinder at a time, slowly increasing the timing and analysing the sounds (aurally and with a computer frequency readout), gases etc. Due to the placement of the sensor and the shape of the block, each cylinder shows up/sounds slightly different. This is why each cyl is done individually. It also allows the ECU to trim each cyl for spark advance individually. The ONLY way to relatively reliably use a knock sensor is through the original ECU for the engine acting as the filter. To give you an idea-for our people to tune up an engine here ready for release (I work at Mitsubishi), it can take well over 12 months. Kinda puts into perspective the quality of the tune put into your car by a dyno opeartor, on a chassis dyno, without a knock sensor and with an aftermarket ECU, (read 'pathetically weak ECU compared to a factory one') doesn't it? Also shows why it is almost impossible to get an aftermarket ECU vehicle emissions compliant-and the standards are only getting tougher each year. Take it easy Sean PS-have alook in an Autronic manual-there is a good base timing map section. I used it for the base map in my 4.5L turbo and went from there. On road with a set of ear phones is a great way to do it-and with an atmo engine, detonation isn't as dangerous as a turbo motor. Just be aware to keep an eye on A/F ratio whilst you do it, as advancing the timing will tend to give you a leaner burn as there is more combustion time in the cyl. [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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