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i'm guessing 10% improvement over carb----maybe. And a large part of that may be due to more accurate/efficient warmup?
Does anyone have any first hand experience showing that an aftermarket EFI system like FiTech or Holley Sniper provides any fuel economy improvements over a carburetor? I understand the benefits of EFI, and the manufacturers seem to completely avoid making any claims about improved MPG, which I'm sure they do for legal reasons. My 454 as expected gets really bad fuel economy. I don't want to assume that an EFI would be a magic fix. I know there many factors that influence MPG.So, I'm wondering if anyone has seen real world MPG improvements with these systems, and what numbers you have seen.
..They didn't go into details on the cars drivetrain but they were quick to say that the mpg's should go from "about" 10 mpg's to "about" 20 mpg's. Sounds a little optimistic to me.
..What I found out is that a properly tuned quadrajet did better for mpg that a TBI
.. But it isnt the magic panacea to all ills.
Night and day compared with the carb cars in pollution era with the goofy cams and all the add on nonsense.