How does this target AFR table look?, VE table results after autotune |
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How does this target AFR table look?, VE table results after autotune |
rwilner |
Mar 28 2012, 08:36 AM
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#1
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
I'm going to use the autotune feature of Microsquirt to set my fuel map (VE table). This system will automatically adjust the VE to achieve the mixture as defined by the target AFR table.
This is a 12x12 table. The Y axis is MAP reading (load), and the X axis is RPM. This table was auto-generated by this microsquirt calculator. What do you guys think? Is this a solid target AFR table or are adjustments needed? |
ChrisFoley |
Mar 30 2012, 12:12 PM
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#2
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I am Tangerine Racing Group: Members Posts: 7,958 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
To me, hysteresis is when my wife says its cold and gets up to adjust the thermostat, then a little while later she says shes too hot and gets up to lower the setting on the t'stat - and so on ad infinitum. If the temperature changed instantaneously to match the t-stat setting there would be no need for her to ever get hysterical. (IMG:style_emoticons/default/rolleyes.gif)
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rwilner |
Mar 30 2012, 12:14 PM
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#3
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
To me, hysteresis is when my wife says its cold and gets up to adjust the thermostat, then a little while later she says shes too hot and gets up to lower the setting on the t'stat - and so on ad infinitum. If the temperature changed instantaneously to match the t-stat setting there would be no need for her to ever get hysterical. (IMG:style_emoticons/default/rolleyes.gif) actually...thermostats have a built-in deadband...this is a special case of intentional hysteresis. (IMG:style_emoticons/default/biggrin.gif) |
914_teener |
Mar 30 2012, 01:17 PM
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#4
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914 Guru Group: Members Posts: 5,245 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
To me, hysteresis is when my wife says its cold and gets up to adjust the thermostat, then a little while later she says shes too hot and gets up to lower the setting on the t'stat - and so on ad infinitum. If the temperature changed instantaneously to match the t-stat setting there would be no need for her to ever get hysterical. (IMG:style_emoticons/default/rolleyes.gif) actually...thermostats have a built-in deadband...this is a special case of intentional hysteresis. (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/popcorn[1].gif) (IMG:style_emoticons/default/popcorn[1].gif) Interesting comment by Chris....particulary with the wife thing... I am assuming still discussing timing here with MS: Are you suggesting Rich that perhaps the stock setup does a better job and retarding or advancing spark than than the circuitry interpolation on the table? |
rwilner |
Mar 30 2012, 01:39 PM
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#5
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
Interesting comment by Chris....particulary with the wife thing... I am assuming still discussing timing here with MS: Are you suggesting Rich that perhaps the stock setup does a better job and retarding or advancing spark than than the circuitry interpolation on the table? Not exactly. I'm suggesting the factory setup has an additional retard feature which compensated for a built-in limitation of a mechanically-advanced system. The retard feature is not needed with a fully electronic system because it is not subject to the same mechanical constraint (a distributor). I guess I am also suggesting that motor performance does not benefit from factoring in change in manifold pressure. Stated differently, instantaneous manifold pressure is enough information to compute optimal advance, assuming you can achieve that advance instantly. |
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