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 <<O>>  Difference Topic MapSensorEquation (r1.2 - 04 Mar 2005 - Home.markolson)
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Modeling the Map Sensor voltage output into a usable number.

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Modeling the Map Sensor voltage output into a usable number. (From the Helm Manual:)

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Alldata publishes a MAP sensor spec, and I took data from my MAP sensor to compare, and added the data per the Helm-based formula: 

05 in Hg| Alldata: 2.5 | 2.35 Helm-based formula | my actual: 2.460 
10 in Hg| Alldata: 2.0 | 1.85 Helm-based formula | my actual: 1.938 
15 in Hg| Alldata: 1.5 | 1.35 Helm-based formula | my actual: 1.509 
20 in Hg| Alldata: 1.0 | 0.85 Helm-based formula | my actual: 1.012 
25 in Hg| Alldata: 0.5 | 0.35 Helm-based formula | my actual: 0.558

Based on the Alldata spec, the formula is:

x = (y - 3.0v)/(-.1)

It looks like these two formulas can give you a reasonable range for calibration. -- markolson - 04 Mar 2005


 <<O>>  Difference Topic MapSensorEquation (r1.1 - 05 Mar 2004 - Home.blundar)
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%META:TOPICINFO{author="blundar" date="1078516868" format="1.0" version="1.1"}% Modeling the Map Sensor voltage output into a usable number.

honda_stock_map_volt.jpg

y = mx + b

y = mx + 2.85v

y = (-.1)x + 2.85v

(-.1)x = y - 2.85

x = (y - 2.85v) / (-.1)


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Revision r1.1 - 05 Mar 2004 - 20:01 GMT - Home.blundar
Revision r1.2 - 04 Mar 2005 - 22:43 GMT - Home.markolson 		%WEBCOPYRIGHT%