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Re: FI tech or MSD fuel injection and fuel mileage wuestion
[Re: fastmark]
#2180946
10/23/16 06:31 PM
10/23/16 06:31 PM
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Joined: Feb 2005
Posts: 528 SW CO
HemiSportFury
mopar
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mopar
Joined: Feb 2005
Posts: 528
SW CO
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If the carb was well tuned switching to EFI will not improve mileage much if any, but once the EFI is tuned properly it will give the same mileage. The EFI is very easy to tune and will constantly try to adjust to the proper AFR. One situation could be his carb was way too lean and now he is operating with a proper AFR.
In my case on my 528 Hemi although I have not driver it much, from a few short drives I know the mileage is better. I never have checked the mileage, no point it was so bad, but to warm it up and take a 20 mile drive with the carb would use 1/4 of a tank. No exaggeration. I've made that same drive a couple of times now including some WOT blasts and the fuel consumption is noticeably less. But I never could get the Demon carb on it adjusted good. It was always just trying to get a balance between idle, transfer and main circuits.
'64 Sport Fury, 528 Hemi, FiTech EFI, 4-speed, 4.10 Dana 60 '57 Belvedere 2dr sedan, current project in process '19 Cherokee Trail Hawk Elite '03 Ram 2500 CTD HO, 6-speed 214,000 miles and still going strong
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