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maftcalibrationbywbo2 [2008/01/23 18:37] DSMmaniac_Big_O A simple formula for calculting the adjustment amount need when using this technique for MAFT calibration |
maftcalibrationbywbo2 [2010/05/13 10:45] dmertz |
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- | ====== History ====== | + | ====== MAFT Calibration by Logged WBO2 ====== |
The following has been copied from the DSMLink forums. The original (courtesy of Ron Francis) may be found at in this [[http://www.dsmlink.com/forums/showthread.php?t=3529|user support forum thread]] (registered DSMLink users only). The text below has been updated to include 1g-specific info, as well as other minor edits. | The following has been copied from the DSMLink forums. The original (courtesy of Ron Francis) may be found at in this [[http://www.dsmlink.com/forums/showthread.php?t=3529|user support forum thread]] (registered DSMLink users only). The text below has been updated to include 1g-specific info, as well as other minor edits. | ||
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Example: If the fuel trim is at a constant +7%, add +7% to the 250 Hz slider in the airflow table. Repeat until you are happy. | Example: If the fuel trim is at a constant +7%, add +7% to the 250 Hz slider in the airflow table. Repeat until you are happy. | ||
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| Adjustment | +17%| +25%| +13%| +4%| +3%| -1%| | | Adjustment | +17%| +25%| +13%| +4%| +3%| -1%| | ||
+ | **Note:** The following calculation method provides a crude approximation of the needed adjustment and depends on the estimated and measured A/F ratio values being somewhere near 10:1. Use ECMLink's correctly calculated WBFactor value instead. | ||
- | A simple formula for calculating this is(submitted by Omar R. "DSMmaniac_Big_O"): | + | A simple formula for calculating this is:<code> |
(est a/f - WB02) * (-10) = airflow adjustment amount. | (est a/f - WB02) * (-10) = airflow adjustment amount. | ||
- | <code>Example: | + | Example: |
MAFRaw (hz) 800 | MAFRaw (hz) 800 | ||
A/F Ratio 9.5 | A/F Ratio 9.5 | ||
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(9.5 - 12.0) * (- 10) | (9.5 - 12.0) * (- 10) | ||
(-2.5) * (- 10) | (-2.5) * (- 10) | ||
- | = 25% </code> | + | = 25% |
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+ | (submitted by Omar R. "DSMmaniac_Big_O") </code> | ||
====== Notes ====== | ====== Notes ====== |