360 mpg improvement question
Senior User
Joined: Jan 2004
Posts: 325
Likes: 0
From: G.R. MICH. 49505
Originally Posted by customcab66
The tag on the rear end it reads 3:13 don't know much about this truck it is all original. Have not opened it up to find out for ser yet.
Senior User
Joined: Jan 2004
Posts: 325
Likes: 0
From: G.R. MICH. 49505
Originally Posted by customcab66
The tag on the rear end it reads 3:13 don't know much about this truck it is all original. Have not opened it up to find out for ser yet.
Senior User
Joined: Dec 2003
Posts: 242
Likes: 0
From: Westerville, OH
I don't know why I'm driving my truck wrong but I'm getting 14.3mpg in a '71 F-250 with a 360 and T-18 4-speed. 4.10 gears, too. Maybe I got one o' them high mileage secret carbs or something.
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Fleet Mechanic
Joined: Jul 1999
Posts: 1,360
Likes: 1
From: Iowa
Tuning is critical in attempting mileage gains in these old trucks. I've got a cast 4bbl Ford intake, Holley carb, and electronic ignition, and I get better than 15 mpg. My truck also only weighs 4,100 lbs.
Just keep track of your timing, carb settings, mpg, etc, and change one thing a week. Figure out what your truck likes best and keep at it.
Ps. keep your tires properly inflated! :-)
Just keep track of your timing, carb settings, mpg, etc, and change one thing a week. Figure out what your truck likes best and keep at it.
Ps. keep your tires properly inflated! :-)
!["Beemer Nut"'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%23bc5285' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>"</text></svg>)
Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Going on 19 years with the same motor different truck with mileage and fuel records. I ran thru mileage marks that have been placed on job the sites plus a stop watch for Mr. Speedo. Tire wear alone can throw things off.
A total of over 922K miles the last 35 years, I record mileage.
The 268 mile one way trips I was taking for years I didn't recall the land shifting closer or farther apart plus a correction added for Mr. Odie as he was 7.3% below the actual mileage.
With literally months of dizzy tuning, running wide band O2 sensors for carb tune, 33" tires with 3.54 gears and not running over 68 mph you can get mileage.
A total of over 922K miles the last 35 years, I record mileage.
The 268 mile one way trips I was taking for years I didn't recall the land shifting closer or farther apart plus a correction added for Mr. Odie as he was 7.3% below the actual mileage.
With literally months of dizzy tuning, running wide band O2 sensors for carb tune, 33" tires with 3.54 gears and not running over 68 mph you can get mileage.
