Commanded Afr Does Not = Actual Afr @wot
04-20-2008, 10:30 AM
#42
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Not sure if I am blind, or stupid, but I cannot find anywhere in my HPTuners program that says Commanded A/F ratio.
I was just attempting to follow along to try and learn some more about the software, but I don't see what you all are talking about.
I was just attempting to follow along to try and learn some more about the software, but I don't see what you all are talking about.
04-20-2008, 12:34 PM
#43
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U have to take the tables and divide the numbers by 14.7. Best thing to do is read the little captions at the bottom about what they do when you hover your mouse over the tabs.
04-20-2008, 01:19 PM
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or hit f1 (help)
the pe multpulier is devided into the "stoic afr value" (14.6xxx) to determine the commanded afr
unless you changed it your stock should apporx 14.7
.....wow im starting to sound smart!
the pe multpulier is devided into the "stoic afr value" (14.6xxx) to determine the commanded afr
unless you changed it your stock should apporx 14.7
.....wow im starting to sound smart!
04-20-2008, 08:40 PM
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04-20-2008, 09:13 PM
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2 things I have always wondered about..
1) How do you safely tune the area of the ve that used for wot while being in sd? I assume they need to be on at 14.7 so that when you pe value divides it its works out right. But you cant very well run 14.7 at wot..
2.) Again how can you sefely the maf in the upper values while having everything disabled?
I have been able to tune part throttle with no problem and get everything close to 0 but at wot my commanded afr is always like 10-11 while its actually running 13.0..
1) How do you safely tune the area of the ve that used for wot while being in sd? I assume they need to be on at 14.7 so that when you pe value divides it its works out right. But you cant very well run 14.7 at wot..
2.) Again how can you sefely the maf in the upper values while having everything disabled?
I have been able to tune part throttle with no problem and get everything close to 0 but at wot my commanded afr is always like 10-11 while its actually running 13.0..
04-20-2008, 10:12 PM
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2 things I have always wondered about..
1) How do you safely tune the area of the ve that used for wot while being in sd? I assume they need to be on at 14.7 so that when you pe value divides it its works out right. But you cant very well run 14.7 at wot..
2.) Again how can you sefely the maf in the upper values while having everything disabled?
I have been able to tune part throttle with no problem and get everything close to 0 but at wot my commanded afr is always like 10-11 while its actually running 13.0..
1) How do you safely tune the area of the ve that used for wot while being in sd? I assume they need to be on at 14.7 so that when you pe value divides it its works out right. But you cant very well run 14.7 at wot..
2.) Again how can you sefely the maf in the upper values while having everything disabled?
I have been able to tune part throttle with no problem and get everything close to 0 but at wot my commanded afr is always like 10-11 while its actually running 13.0..
04-21-2008, 10:30 AM
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04-21-2008, 10:46 AM
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I ran my motor (WOT and all) for about 10 minutes on my first VE tuning attempt a wee bit lean... like 16's and 17's... hope I didn't harm anything. After two drives last night however, its almost dead nuts on commanded vs actual.
04-21-2008, 12:24 PM
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05-06-2008, 11:40 AM
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I Think I Got It.. Did It Twice Now It Seems My Commanded Afr And Actual Are The Same
Did Have To Find Some Nice Streches Of Road As It Wasnt Too Easy To Get 50+ Hits Of Those Higher Maf Frequencies
Basically Had To Do 30-140mph Runs Up And Down The Highway And Still There Was A Few Cells In The End That I Couldent Hit (believe Me I Tried) But You Can Pretty Much Get The Point And Draw Your Own Curve
The Only Thing I Can Add To All This Is To Make Sure You Look At Your Maf Curve In The Plotted View And Smooth It Back Out As Unless You Have Shitloads Of Data It Will Look A Little Lumpy At First
Did Have To Find Some Nice Streches Of Road As It Wasnt Too Easy To Get 50+ Hits Of Those Higher Maf Frequencies
Basically Had To Do 30-140mph Runs Up And Down The Highway And Still There Was A Few Cells In The End That I Couldent Hit (believe Me I Tried) But You Can Pretty Much Get The Point And Draw Your Own Curve
The Only Thing I Can Add To All This Is To Make Sure You Look At Your Maf Curve In The Plotted View And Smooth It Back Out As Unless You Have Shitloads Of Data It Will Look A Little Lumpy At First