the great chase
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Tuned
Joined: Mar 2007
Posts: 317
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From: Sabin, Mn
the great chase
Hey guys, In september I bought a 1994 ford f150 4x4 super cab with a 150,000 mile 5.8l and automatic. It has the waldoch conversion. Now, It is not getting the fuel millage that i was expecting. The best i have gotten is 240 miles out of just shy of 17 gallons of gas. so, I am in search of at least couple more mpg. It is completely stock. it has 3.55 gears according to the window sticker. Will a K&n anything help? dual exhaust? single exhaust with a flowmaster 70 series? I do know it's in need of a tune up due to a twitchy idle. any help will be appreciated.
Lead Driver
Joined: Jan 2003
Posts: 9,893
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From: Ohio
14 in town? I consider that pretty good for that truck(4x4, auto, 351).
I just put shorties and true duals on my '89 302/aod/3.55 2wd truck. I haven't had the chance to get a road trip to see if it increased mileage on the highway. Around town it's about the same so far, around 14. Completely stock,130K miles, including air filter.
I just put shorties and true duals on my '89 302/aod/3.55 2wd truck. I haven't had the chance to get a road trip to see if it increased mileage on the highway. Around town it's about the same so far, around 14. Completely stock,130K miles, including air filter.
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Tuned
Joined: Mar 2007
Posts: 317
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From: Sabin, Mn
That's 90% highway. I drive 60 miles roughly round trip a day for work and school. i set cruise control at 60. Forgot to mention that the front hubs have been changed over to manual hubs by previous owner and they are in the free position. it has Highway tires on it.
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Tuned
Joined: Mar 2007
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From: Sabin, Mn
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Carpenter Local 745
Joined: Apr 2006
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From: on da beach
I was thinking about running this size until I lift my truck.
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Carpenter Local 745
Joined: Apr 2006
Posts: 5,794
Likes: 11
From: on da beach
There is generally a tipping point, but at highway speeds, a larger tire
Will let the engine turn at less RPM. "saving fuel".
Will let the engine turn at less RPM. "saving fuel".
Carpenter Local 745
Joined: Apr 2006
Posts: 5,794
Likes: 11
From: on da beach
Read over the thread in your other conversion thread.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
14mpg isn't bad but not exceptional. I would not suggest larger diameter tires if you live anywhere that isn't flat in all directions, 3.55 gears and only 4 forward speeds produces a lot of downshifting on hills and that kills fuel milage. The single best thing you can do for milage without going inside the motor is fit longtube headers and a single 2.5" exhaust system(mendrel bent tubing), if you have a muffler shop create it then 3" tubing produces the same result after factoring in the compression bends.
P.S. What does a waldoch conversion look like on a pickup?
P.S. What does a waldoch conversion look like on a pickup?