fuel milage
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Freshman User
Joined: May 2007
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fuel milage
ive got a 69 f100 2wd with a 289, 4spd, and a 9" rear, i was wandering how to get better fuel milage, now im getting 15, i was wandering how tall of a gear i could go in it to get better milage but not be sluggish off the start
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
I'd say that you are maxed out. You are driving a box with no areo at all. The thing is you could possibly pick up another mpg, but you would never recover the cost in trying to get there.
Want better mpgs, park the truck and drive a car. My Taurus truck is my daily driver.
John
Want better mpgs, park the truck and drive a car. My Taurus truck is my daily driver.
John
Post Fiend
Joined: Sep 2007
Posts: 6,221
Likes: 6
From: Cow Town, CA
yeah i would kill to get 15 or even over 10 for that matter...
but driving down hill all the time would help, always having the wind to your back, take all the sheetmetel off.....you get the idea...
but driving down hill all the time would help, always having the wind to your back, take all the sheetmetel off.....you get the idea...
New User
Joined: Feb 2008
Posts: 9
Likes: 0
You want better than 15 with these old trucks? I would be one happy camper if I got anywhere close to 15. I get around 10 on a good day. It is my only vehicle so I have to deal with it.
I dream of being able to pass a gas station without having to stop and fill up. It sure is fun to drive though.
I dream of being able to pass a gas station without having to stop and fill up. It sure is fun to drive though.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
I got my doubts that the 289 could pull 2.75 gears in the pickup without costing mpgs.
I have run a 2.75 behind my FE but it has way more torque that the 289. I have found that the 3.00 performs much better for all around in my truck.
John
I have run a 2.75 behind my FE but it has way more torque that the 289. I have found that the 3.00 performs much better for all around in my truck.
John
Fleet Mechanic
Joined: Aug 2007
Posts: 1,836
Likes: 261
From: Piney Woods of East Texas
Pulling to big of a gear you will loose gas millage. With only a 289 I would not even try it. My 68 only gets 8-9mpg, so if I got 15, I would be in hog heaven. But it's not a daily driver.
Fleet Mechanic
Joined: Dec 2006
Posts: 1,338
Likes: 6
From: UPSTATE NY
i get 15 also, and with you having a manual transmission i think u should be able to get an extra mpg or 2 on me, other ways not gearing, but like everyone says it will cost ya a considerable amount of money that you can buy an aweful lot of gas with.
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Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
What kind of mpgs do you get with the bronk?
John
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Senior User
Joined: Aug 2008
Posts: 141
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From: north carolina
like everone says the cost of trying too save will cost more on parts in the shortrun.i had a 80 150 4 wheel drive 300 six with a new prosess transmission,but the truck came with 32's and it seem ya had to wind the clutch to get her going.the input bearing went out in it,so i put in a regular 4 speed with the granny gear and it took off a lot better in 2nd gear.my point is that trans seems to me to be higher geared and probally was better on gas than that 4 speed,but really did not have it long so i dont remember the mpg's.i dought that trans would bolt up to yer engine but not really sure.just trowin some ideas.
Senior User
Joined: Jan 2008
Posts: 183
Likes: 0
my truck, with a 302, c4, 9" rear end with 3.73 non locker rear, and 31" tall tires electrick fan, and a median sized 4 bbl. i would get around 20-25 MPG! i had my grandpa do all the set up, he's a genius. but thae main thing is keep your foot out of it, and keep up with the oil changes and air filters and make sure your air pressure in your tires is correct
Last edited by matejcekautoworks; Sep 25, 2008 at 02:01 PM. Reason: add info
Junior User
Joined: Oct 2007
Posts: 79
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From: Aromas, CA
So about three weeks ago I took the 68 up to San Francisco to pick up a king sized bed.
95 miles one way and I burned a 16 gallons round trip. Well I wasn't that surprised but you do the math. 12 mpgs!!!! Thats cruzing @ 70mph and with only 300 or so pounds in the back, one way! I run the stock 360 with the crappy stock 2 bbl and such. Everything in that truck is origonal except the new Tires and rims!! I bet you can squeeze 15+ out of these old beasts but to me thats not an issue sense its not my daily driver.
25mpgs in a 72?? Sounds like a job for Mythbusters!!!!!
95 miles one way and I burned a 16 gallons round trip. Well I wasn't that surprised but you do the math. 12 mpgs!!!! Thats cruzing @ 70mph and with only 300 or so pounds in the back, one way! I run the stock 360 with the crappy stock 2 bbl and such. Everything in that truck is origonal except the new Tires and rims!! I bet you can squeeze 15+ out of these old beasts but to me thats not an issue sense its not my daily driver.
25mpgs in a 72?? Sounds like a job for Mythbusters!!!!!