Help with VE table, SD tune
05-11-2007, 10:34 PM
#1
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Help with VE table, SD tune Ok guys help me out here. SD tune, no MAF. I was on the track today and my WB scan is rich below 4000 and lean above 5000. I run this motor to 6500, mods are in sig. That was with a screwed up VE table, I copied the wrong one last night. So tonight, I put in my best VE table, went for a run in the country, and it is a lot better. It breaks the tires loose in 2nd so I have to use third gear and at 6500 I'm going 130 mph so I have to back off, but it has the same pattern, rich (11.5) below 4000 and lean (14.5) 5000-6500.
My PE is pretty flat and OLFA flat. I could just change the PE, but I know you are going to say work on the VE table. OK, very basic question, which way do I go with the numbers on the VE, where it is rich under 4000, do I make the numbers lower?? lean above 5000 bigger?. I'm don't have much experience with this and I need to get it right before qualifying tomorrow. I just installed the LS2TB and FAST90 and have not had time to test.
Thanks
My PE is pretty flat and OLFA flat. I could just change the PE, but I know you are going to say work on the VE table. OK, very basic question, which way do I go with the numbers on the VE, where it is rich under 4000, do I make the numbers lower?? lean above 5000 bigger?. I'm don't have much experience with this and I need to get it right before qualifying tomorrow. I just installed the LS2TB and FAST90 and have not had time to test.
Thanks
05-12-2007, 12:54 AM
#2
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Actual_AFR / Commanded_AFR = AFR%Error
Multiply VE cell by AFR%Error
If you're lean at 14:1 when you were commanding 13:1 in a given cell, you'd need to increase that cell by 7.7% (14/13=1.077).
Multiply VE cell by AFR%Error
If you're lean at 14:1 when you were commanding 13:1 in a given cell, you'd need to increase that cell by 7.7% (14/13=1.077).