Gas mileage
Posting Guru
Joined: Jul 2001
Posts: 1,613
Likes: 2
From: Gainesville, FL
Gas mileage
Big Blue is right!
You couldn't have a bigger gas hog! But you couldn't have a more definitive truck either!
Change your diff gears. I'd recommend going to 3.00:1 With a 460, your gonna get away with it. You won't loose the bottom end if you have a granny which I'm pretty sure you do.
Good luck, Have Fun,
KingFisher
You couldn't have a bigger gas hog! But you couldn't have a more definitive truck either!
Change your diff gears. I'd recommend going to 3.00:1 With a 460, your gonna get away with it. You won't loose the bottom end if you have a granny which I'm pretty sure you do.
Good luck, Have Fun,
KingFisher
Posting Guru
Joined: Sep 2001
Posts: 1,531
Likes: 1
From: in the country
Gas mileage
Boy--Youse guys really got me scared!---5 to 7 mpg----I haven't even started the rebuild yet on the 400 in my 77 hiboy......I was planning on getting the maximum HP out of my engine---But , not to worry , I have the ultimate solution to the problem--Yes its' so simple---I jess don't unner'stann why youse guyys ain't figgured it out---just go purchase (2) -1968 volkswagon body's --then mount them both on a 70-79 crewcab frame---you've got a German crewcab--that will get about 30 MPG---The Feurher vill love eating a suarkraut burger at der Sonic from dis baby---of course you'll have to have Blond hair and Blue eyes--- fd
New User
Joined: Jan 2008
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Likes: 24
Gas mileage
[updated:LAST EDITED ON 12-Dec-01 AT 10:12 PM (EST)]What elevation are you guys getting that poor of mileage out of a big block?
With My 429 CJ,
I drive at about 3400 Ft above sea level most of the time.
Our Imperial gallon is only 20% larger than your U.S. gallon and I get 18 MPG / 55-60 MPH SOLO
and about 13-16 MPG when I pull my 4000 lb holiday trailer.
Of course, there is always an EGG underneath my gas pedal when I drive though.
Dennis
It's Almost Time Everyone.
https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=314&.jpg
78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles
With My 429 CJ,
I drive at about 3400 Ft above sea level most of the time.
Our Imperial gallon is only 20% larger than your U.S. gallon and I get 18 MPG / 55-60 MPH SOLO
and about 13-16 MPG when I pull my 4000 lb holiday trailer.
Of course, there is always an EGG underneath my gas pedal when I drive though.
Dennis
It's Almost Time Everyone.
https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=314&.jpg
78 F-150 429CJ C6 ,Silver w/Explorer Pkge
641/2 Mustang,Pre-World's Fair Car #8092
64 Fairlane S/C waiting for a 390-4spd.
68-Mustang.Sunlit Gold 80,000 miles
Senior User
Joined: Sep 2001
Posts: 218
Likes: 0
Gas mileage
I;d say go with the basics.
Get a good quality tune up for carb, ignition etc.
And make sure there is as little driveline resistance as possible:
-air up the tires
-grease wheel brearings (yes it's true I've heard of gas milage being doubled by greasing wheel bearings)
Then after those are checked I would go with aftermarket things like exhaust/intake (The better you can move air in and out of an engine increases its effeciency.
Get a good quality tune up for carb, ignition etc.
And make sure there is as little driveline resistance as possible:
-air up the tires
-grease wheel brearings (yes it's true I've heard of gas milage being doubled by greasing wheel bearings)
Then after those are checked I would go with aftermarket things like exhaust/intake (The better you can move air in and out of an engine increases its effeciency.
