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Old 12-23-2007, 11:56 AM   #1
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Tuning: Math help plz.

I am having problems with this formula. Can someone shed some light plz.

Formula = ((MAF (lbs/min) X 2) / (RPM X 8) / engine displacement (.00155)

RPM X 8 >> Why is rpm times 8? Is 8 the cylinder count? should this then not be 4 for the Focus?

In my example they give engine displacement as .00155. How is this number derived? I thought a 2 liter engine had a displacement of 2 liters.

Very confused!!!

Source Text is "The basics of tuning"

Thanks


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Old 12-23-2007, 11:59 AM   #2
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What are you trying to figure out... MAF counts, airflow in #/min or what?
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Old 12-23-2007, 12:20 PM   #3
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Quote:
Originally Posted by 03OrangeSVT View Post
What are you trying to figure out... MAF counts, airflow in #/min or what?
I am just going through the book at the moment (baby steps). Trying to wrap my head around all the data and understanding the math. For "Load" it gave the above formula (with example) and I realized I did not understand the stated formula values.
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