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MikeD930 MikeD930 is offline
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Join Date: Apr 2008
Location: missouri
Posts: 1,566
My 930 already has EFI (+425 rwhp) when I bought it so I can't really compare before and after. I get around 15-19 mpg (depending on type of driving but always get on the boost at least once no matter how short the drive). From my observations it appears that and EFI may be slightly more effecient (i.e. 1-2 mpg) when staying away from boosting on both type cars. It probably don't matter when you're on the boost a lot in either type of cars. It's the state of tune that mostly affects mpg in either cars. That's my opinion.
'87 930
Old 03-19-2010, 12:21 PM
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