[1686]

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?

 

[578]

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.

 

[Guest]

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.

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

 

[286]

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

. Right?
FunInTheMud

 

[Guest]

That would be true but it's easier because you're blowin up more air and fuel for more power

 

[Guest]

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.

 

[Guest]

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

 

[286]

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.

 

[2110]

Got to throw the

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......

 

[FunInTheMud]

Ok just say you have two 1-ton Chevy's. One has a 350 in it, and the other has a 454 in it. Both have the same options and gearing. Fill them both up to the max, put one hell of a load in them, and drive around till you run out of gas. Which one would get the better fuel mileage?
FunInTheMud

 

[FunInTheMud]

Dangit b454rat,

You beat me to the point I was getting at

FunInTheMud

 

[356]

Remember the price of parts too...a 454 will be more expenisve to buy, drive and fix. It will also be funner though.

 

[454]

In reply to:

Thanks for clearing that up. I wasn't aware that a 454 was a bigger engine than a 350.

[/ QUOTE ]

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[pmd19691979]

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.

A b8g block is always worse on gas because the bore and stroke are bigger. A 305 with a perf cam and fuel 8njection will move a lifted 4x4 pretty good. I've done it on 44s.