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

Debonair · 10-27-2011, 01:32 PM

The truck is a 95 S10 Extended cab, weighing in at 3300 pounds.

It has the 4.3L V6 and 5 speed. they were rated at 17 city but i've gotten close to 21 MPG from just changing how i drive.

Eventually i'd like to swap engines for fun, a little more power, and possibly better fuel mileage.

one of the engines i'm looking at is the Gen III/IV 4.8L V8.
they come in the full size silverado. they weigh ~4631 pounds, and they're rated at 15-16 city.

If i swap it into my truck mated to a 6 speed manual transmission, do you guys think i would be able to get 21-22 City? maybe even more?

additional thought: my camaro has the 5.7L V8 (the same engine design) and a automatic 4 speed. weights about 3300-3400 and i get 18.5-19 city consistently. I've gotten 20 before.

10-27-2011, 01:32 PM	#1 (permalink)
Debonair EcoModding Lurker Join Date: Sep 2011 Location: New Jersey Posts: 53 Camaro - '00 Chevrolet Camaro SS 90 day: 16.18 mpg (US) S10 - '95 Chevrolet S10 LS 90 day: 15.84 mpg (US) Formula - '99 Pontiac Firebird Formula 90 day: 21.14 mpg (US) Thanks: 3 Thanked 0 Times in 0 Posts	Fuel Economy from an engine swap: projections? The truck is a 95 S10 Extended cab, weighing in at 3300 pounds. It has the 4.3L V6 and 5 speed. they were rated at 17 city but i've gotten close to 21 MPG from just changing how i drive. Eventually i'd like to swap engines for fun, a little more power, and possibly better fuel mileage. one of the engines i'm looking at is the Gen III/IV 4.8L V8. they come in the full size silverado. they weigh ~4631 pounds, and they're rated at 15-16 city. If i swap it into my truck mated to a 6 speed manual transmission, do you guys think i would be able to get 21-22 City? maybe even more? additional thought: my camaro has the 5.7L V8 (the same engine design) and a automatic 4 speed. weights about 3300-3400 and i get 18.5-19 city consistently. I've gotten 20 before. __________________ [url=http://ecomodder.com/forum/em-fuel-log.php?vehicleid=5445]