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Dr J Dr J is offline
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Join Date: Apr 2008
Location: Miami
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Interesting point.

After thinking about it though, I believe it is accounted for. The equation does have provision for a duty cycle:

HP = (flow * #injectors * duty cycle)/(10.5 * BSFC)

In this case, the duty cycle of 100% becomes the number 1 (0.85 for 85%, 0.7 for 70%, etc.)

Basically, the formula calculates the amount of fuel coming in (flow * # injectors * duty cycle) and converts it to HP, using a conversion factor (BSFC). The 10.5 converts the fuel from cc/min to lb/hr of gasoline.
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1979 SC, Slant nose wide-body cab conversion. AEM Infinity EFI. Whipple Supercharged!
Old 01-16-2010, 08:10 PM
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