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Old 02-18-2009, 03:05 PM   #1
cwatson411
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Brake Specific Fuel Consumption

does anyone know a good estimate of BSFC (brake specific fuel consumption) at full throttle expecting to make about 250whp-275whp?


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Old 02-18-2009, 03:06 PM   #2
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on my zetec motor of course, the edit button isnt working for me
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Old 02-18-2009, 08:51 PM   #3
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If you're trying to figure out what size injectors to use, 60lb would be good for that power level.
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Old 02-18-2009, 09:34 PM   #4
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thats what i was thinking just quirous (sp?) as to how much cushion that would leave.
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Old 02-18-2009, 09:45 PM   #5
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That will also depend on what you have your MAFia set at

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Old 02-19-2009, 10:47 AM   #6
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so , the mafia operates kinda like a resistor to shift the volts of the maf where you need it correct?
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Old 02-20-2009, 06:41 AM   #7
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so , the mafia operates kinda like a resistor to shift the volts of the maf where you need it correct?
Sort of yes. There are items that have to be adjusted within a tune to compensate for this as well.
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Old 02-24-2009, 03:54 PM   #8
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Sort of yes. There are items that have to be adjusted within a tune to compensate for this as well.
tell us more. we would love to know!
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Old 02-25-2009, 06:53 AM   #9
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tell us more. we would love to know!
Typically injector slopes, manifold volume and engine displacement have to be scaled when something like this is used. This is so that load is calculated properly with the new maf signal.
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Old 02-25-2009, 08:42 AM   #10
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I have never had to change the manifold volume on the Focus but as Blivit said injector slope , displacement will need to be changed to get proper fueling and load back in check

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