Timing - Revision history

Nyet: /* Questions */

2011-03-26T00:14:08Z

Questions

← Older revision		Revision as of 00:14, 26 March 2011
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	Finally, when people talk about the ECU's correction limitations, are we talking about short AND long term correction summed? or just short?		Finally, when people talk about the ECU's correction limitations, are we talking about short AND long term correction summed? or just short?

			http://www.nefariousmotorsports.com/forum/index.php/topic,444.msg3621.html#msg3621


	[[Category:Timing]]		[[Category:Timing]]

Nyet: /* Comments */

2011-03-25T02:10:22Z

Comments

← Older revision		Revision as of 02:10, 25 March 2011
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	http://forums.audiworld.com/s4/msgs/2461364.phtml		http://forums.audiworld.com/s4/msgs/2461364.phtml

	If you have consistent high KV activity, it'll bump your CF's in a similar way. The knock sensor circuits are also pretty smart. They know what signal pattern matches up with destructive knock and requires immediate attention (combination of cylinder and frequency/amplitude)and one that indicates insufficient octane (all cylinders and freq/amplitude). The second type results in a more rapid application of CF. KV's are just a shadow of the info the ECU gets from the [[knock sensors]].		If you have consistent high KV activity, it'll bump your CF's in a similar way. The knock sensor circuits are also pretty smart. They know what signal pattern matches up with destructive knock and requires immediate attention [[knock recognition \| (combination of cylinder and frequency/amplitude)]] and one that indicates insufficient octane (all cylinders and freq/amplitude). The second type results in a more rapid application of CF. KV's are just a shadow of the info the ECU gets from the [[knock sensors]].

	All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.		All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.

Nyet: /* Analysis */

2008-03-14T19:32:41Z

Analysis

← Older revision		Revision as of 19:32, 14 March 2008
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	==Analysis==		==Analysis==
		⚫	IAT actually goes in to the initial determination of "optimal timing", which is also based on cylinder pressure (calculated from load, which comes from MAF) and RPMs?
⚫	http://forums.audiworld.com/s4/msgs/2461608.phtml

		⚫	Then, its adjusted by the CF (long term). CF can move around (slowly) based on "medium term" knock events (average retard) that the ECU thinks indicate stuff like octane. These effect ALL cylinders equally.
	IAT actually goes in to the initial determination of "optimal timing"

		⚫	Short term knock events can bump a particular cylinder's current retard (CF) up. It can recover too, subject to both RPM change and load change hysteresis, (only?) if short term events go away, but they do not affect CF like the "medium term" knock type does, and they do not affect all cylinders equally.
⚫	which is also based on cylinder pressure (calculated from load, which comes from MAF) and RPMs?

		⚫	Source: http://forums.audiworld.com/s4/msgs/2461608.phtml
⚫	~~then~~, its adjusted by the CF (long term). CF can move around (slowly) based on "medium term" knock events that the ECU thinks indicate stuff like octane. ~~these~~ effect ALL cylinders equally

⚫	~~short~~ term knock events can bump a particular cylinder's current retard ~~down~~. It can recover too, (only?) if short term events go away, but they do not affect CF like the "medium term" knock type does, and they do not affect all cylinders equally.

	==Questions==		==Questions==

Nyet: /* Questions */

2008-03-14T19:27:11Z

Questions

← Older revision		Revision as of 19:27, 14 March 2008
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	is CF 1:1 with degrees, or is there another equation that translates CF into a retard amount (e.g. involving load or RPM?)		is CF 1:1 with degrees, or is there another equation that translates CF into a retard amount (e.g. involving load or RPM?)

			There appears to be a "super" long term retard (or advance?) that is stored in the ECU as an adaptation. It does not appear to be loggable. It appears to be an "advance" because the timing tables in ME7 seem to represent a "maximally safe" amount of timing; those values minus CF are always lower than the actual timing. The only way to clear this "super" long term adaptation seems to be to leave the ECU powered off for an extended period of time.

	Finally, when people talk about the ECU's correction limitations, are we talking about short AND long term correction summed? or just short?		Finally, when people talk about the ECU's correction limitations, are we talking about short AND long term correction summed? or just short?

Nyet: Reverted edit of 219.95.65.250, changed back to last version by Nyet

2007-04-18T05:11:09Z

Reverted edit of 219.95.65.250, changed back to last version by Nyet

← Older revision		Revision as of 05:11, 18 April 2007
Line 10:		Line 10:

	All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.		All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.
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	==Analysis==		==Analysis==

Pansgor: /* Comments */

2007-04-13T00:24:47Z

Comments

← Older revision		Revision as of 00:24, 13 April 2007
Line 10:		Line 10:

	All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.		All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.
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	==Analysis==		==Analysis==

Nyet: Reverted edit of 64.27.20.205, changed back to last version by Nyet

2007-03-10T08:15:41Z

Reverted edit of 64.27.20.205, changed back to last version by Nyet

← Older revision		Revision as of 08:15, 10 March 2007
Line 10:		Line 10:

	All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.		All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.
	47943768113968454351612

	==Analysis==		==Analysis==

Pansgor: /* Comments */

2007-03-09T12:33:21Z

Comments

← Older revision		Revision as of 12:33, 9 March 2007
Line 10:		Line 10:

	All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.		All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.
			47943768113968454351612

	==Analysis==		==Analysis==

Nyet at 20:43, 3 September 2006

2006-09-03T20:43:00Z

← Older revision		Revision as of 20:43, 3 September 2006
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	Finally, when people talk about the ECU's correction limitations, are we talking about short AND long term correction summed? or just short?		Finally, when people talk about the ECU's correction limitations, are we talking about short AND long term correction summed? or just short?



			[[Category:Timing]]

Pansgor at 20:38, 3 September 2006

2006-09-03T20:38:16Z

← Older revision		Revision as of 20:38, 3 September 2006
Line 7:		Line 7:
	http://forums.audiworld.com/s4/msgs/2461364.phtml		http://forums.audiworld.com/s4/msgs/2461364.phtml

	If you have consistent high KV activity, it'll bump your CF's in a similar way. The knock sensor circuits are also pretty smart. They know what signal pattern matches up with destructive knock and requires immediate attention (combination of cylinder and frequency/amplitude)and one that indicates insufficient octane (all cylinders and freq/amplitude). The second type results in a more rapid application of CF. KV's are just a shadow of the info the ECU gets from the knock sensors.		If you have consistent high KV activity, it'll bump your CF's in a similar way. The knock sensor circuits are also pretty smart. They know what signal pattern matches up with destructive knock and requires immediate attention (combination of cylinder and frequency/amplitude)and one that indicates insufficient octane (all cylinders and freq/amplitude). The second type results in a more rapid application of CF. KV's are just a shadow of the info the ECU gets from the [[knock sensors]].

	All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.		All of those variables are adjustable too. If you look at many chips, like X, you'll see the timing recovers on a 1:1 scale with the pull. Stock timing logic, like I'm running now, is much slower to recover.