400 mpg?
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New User
Joined: Feb 2003
Posts: 17
Likes: 0
From: ND
400 mpg?
Hey all, I just installed a fresh 400 rebuild in my truck, same motorcraft 2v carb and manifold, stock rebuild except for timing chain and cam. My mpg right now is around5-6 intown, I know motors are tight when they are fresh but this seems really low. Before the rebuild I could count on around ten in town and 14 Hwy, maybe I will gain 1-3 mpg's after breakin. But this is worrying me.
What are you people getting for mpg with your 400's?
What are you people getting for mpg with your 400's?
Elder User
Joined: Feb 2001
Posts: 829
Likes: 0
From: Porterfield
400 mpg?
Here this should make you feel better .
In My Pull Truck I run Low Range 2nd Gear during a pull.Most pulls are 300 feet long. I usally end up in the 285 to 295 foot range.
I burn 3 Gals of Phillups B 33 racing fuel at $9.50 a Gal. per pull, And I pull in two classes at each event .
So every two runs it cost me about $57.00 .... How far can you go for $57.00 in your Truck.
In My Pull Truck I run Low Range 2nd Gear during a pull.Most pulls are 300 feet long. I usally end up in the 285 to 295 foot range.
I burn 3 Gals of Phillups B 33 racing fuel at $9.50 a Gal. per pull, And I pull in two classes at each event .
So every two runs it cost me about $57.00 .... How far can you go for $57.00 in your Truck.
Fleet Mechanic
Joined: Jan 2003
Posts: 1,810
Likes: 15
From: Central Ohio
400 mpg?
Well I have a '78 currently with a 351M c6 tranny, 33" tires, 3.50:1 rear end and around town I get about 8-9mpg. Its a stock rebuild except I added edelbrock aluminum intake, holley truck avenger carb (670cfm), free flowing dual 2.5" exhaust with dynomax headers. But I am still tunning in my carb and timming. Its been an ongoing tunning adventure lol!
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