454 vs 350 gas mileage

[Jwingfield2k]

What type of difference would I be getting from a 454 or a 350 in gas mileage. say 35's, 4:10's, but is a 454 going to get alot worse gas mileage or just a little worsE?

[u4ia4]

there will be a bit ofa difference prolly, but nothing to severe. i mean c'mon. 6,000 pound truck, lift, tires and waht not...one or 2 miles per gallon difference wont break you.

454 will get worse to a 350 lifted, but not too much less. lets say 1-3 mph gallon less.

The higher the ride, the better head. [img]images/graemlins/RockOn.gif[/img]

99 GMC sierra 4x4 SC 350
82 F-250 diesel 4x4 SC warn 12k, 10"super 39.5 boggers
03 Grizzly 660

[Bowtiepower00]

Depends on the truck, the bigger it is the closer it will be. Willys got better mileage in his crew cab 454 before he lifted it than I do with my reg cab 350. Either way I wouldn't expect much more than 12mpg if it's lifted with 35's...

[FunInTheMud]

Now wait a minute, wouldn’t a 454 be more efficient than a 350? Because it would be easier to get a truck movin with a 454 rather than a 350, and a hell of a lot easier than a 305 [img]images/graemlins/frown.gif[/img]. Right?
FunInTheMud
[img]images/graemlins/40BEER.gif[/img]

That would be true but it's easier because you're blowin up more air and fuel for more power [img]images/graemlins/grin.gif[/img]

That sounds good but no. A 454 motor takes more fuel to run because it is a greater cubic inch then a 350. Meaning bigger cylinder, bigger pistons, more fuel needed. A stock 454 on a pickup with stock tires, Run about 8 miles to the gallon loaded or unloaded.

Hmm I don't have any numbers for you but I would say bad for a 350 and worse for a 454.. But you'll have more fun burnin that gas with a 454 [img]images/graemlins/laugh.gif[/img]

[Bowtiepower00]

Thanks for clearing that up. I wasn't aware that a 454 was a bigger engine than a 350. It takes a lot more throttle to get a small block truck moving, so the difference usually isn't that great. If you are bashing around with your foot to the floor, then yeah the 454 is going to use a lot more gas. A fuel injected truck with OD and stock tires will get closer to 12 mpg, not 8, which is about what a small block truck gets. This has been covered before, more than once. [img]images/graemlins/chairfall.gif[/img]

[b454rat]

Got to throw the [img]images/graemlins/bs.gif[/img] on that one. I have a 97 with a 454, 4 speed auto, stock size tires, and when I drove to Colorado with it, I was getting about 14-15 mpg, doing 70. My truck gets better mileage than the old mans Dog, er Dodge with a 360. If you keep your foot off the pedal, gas isn't as bad as people think. Just my two bits...... [img]images/graemlins/grin.gif[/img]