Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Fuel Economy from an engine swap: projections?

beatr911 · 10-27-2011, 02:59 PM

From the numbers you present, yeah it sounds like 21-23 city is in the ballpark. Not a lot of mpg improvement, but apparently the 4.3 wasn't developed for low BSFC.

If you want to do a V8 swap it is probably a good choice. Doesn't the 5.7 have cylinder deactivation and get about the same mpg numbers as the 4.8? Maybe that would give more power with the same or slightly better mileage. Prolly costs more though.

If doing a swap, most of us here would be installing a 3cy diesel or at least the 2.2 four popper. That's probably why you're not getting alot of love on this thread.

10-27-2011, 02:59 PM	#2 (permalink)
beatr911 Master EcoModder Join Date: Feb 2008 Location: West Coast, USA Posts: 516 B2300 - '96 Mazda B2300 SE Focus - '05 Ford Focus ST The red car - '00 Honda Insight Thanks: 6 Thanked 77 Times in 56 Posts	From the numbers you present, yeah it sounds like 21-23 city is in the ballpark. Not a lot of mpg improvement, but apparently the 4.3 wasn't developed for low BSFC. If you want to do a V8 swap it is probably a good choice. Doesn't the 5.7 have cylinder deactivation and get about the same mpg numbers as the 4.8? Maybe that would give more power with the same or slightly better mileage. Prolly costs more though. If doing a swap, most of us here would be installing a 3cy diesel or at least the 2.2 four popper. That's probably why you're not getting alot of love on this thread. __________________ Good design is simple. Getting there isn't.