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? |
mrbubblehead |
Mar 28 2012, 04:07 PM
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#2
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Twodollardoug Group: Members Posts: 1,155 Joined: 17-December 10 From: calimesa ca. Member No.: 12,492 Region Association: Southern California |
aircooled type 4.... no egt. cylinder head temp, oil temp, and a/f gauges.
actually 14.7 is the death zone. that is where your cyl head temps and pressures are the highest. you never want to be there, light load or heavy WOT. the chart is from piston powered aircooled aircraft engines. im not guessing. aircraft guys have known this for 70 years... we in the automotive world are just catching up... their engines are a little more costly to rebuild than ours. your right, i did stray. yes for a base line, i would try to hit 12.7-13.5. |
JamesM |
Mar 28 2012, 11:42 PM
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#3
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Senior Member Group: Members Posts: 1,958 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
aircooled type 4.... no egt. cylinder head temp, oil temp, and a/f gauges. actually 14.7 is the death zone. that is where your cyl head temps and pressures are the highest. you never want to be there, light load or heavy WOT. the chart is from piston powered aircooled aircraft engines. im not guessing. aircraft guys have known this for 70 years... we in the automotive world are just catching up... their engines are a little more costly to rebuild than ours. your right, i did stray. yes for a base line, i would try to hit 12.7-13.5. Is this a stock engine? 1.7, 1.8, or 2.0? What sort of timing are you running when you are at 16-17:1? What sort of head & oil temps are you seeing? Are you missfiring at all? |
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