good mpg?
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Senior User
Joined: Jan 2011
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From: North Georgia
good mpg?
i really love these year of trucks and would like to get good gas mileage with out having to sell it so is it even possible to get 20 or above miles per gallon out of a 72 f100?
its 2wd i have a 4 speed that will fit a 302 or 351 but i know 4 speeds are fairly low geared. is a inline six my best route? my current daily driver is a 76 f100 4x4 with a 360 and 4speed but i would like to start this 72 project with one thing in mind and that is mpg.
its 2wd i have a 4 speed that will fit a 302 or 351 but i know 4 speeds are fairly low geared. is a inline six my best route? my current daily driver is a 76 f100 4x4 with a 360 and 4speed but i would like to start this 72 project with one thing in mind and that is mpg.
Lead Driver
Joined: Jun 2006
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From: Near Yosemite CA
Hmm... your still pushin a brick through the air,,, these weren't designed with mileage or aeromatics (from Cars movie) in mind,,, although,,, I have avg. 16-17 with my 66 F250, had a 300 I6, holley 390cfm, Offenhauser 4bbl intake and Hedman headers, truck had NP435 and 4.10s and that was driving in Orange county/Riverside and about,,, keepin it around 55-62,,, so if ya drive nice, you could get close,,, and FI should help a bit,,
Senior User
Joined: Nov 2010
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From: North Carolina
EFI conversions are pretty pricy, but i have read a couple "testimonials" and heard of people with BB's getting 40% fuel mileage increase. that would put 10-11 mpg (which im assuming is about what you're getting) at around 14-15 mpg...electronic ignition might help you out, along with a fuel regulator. I have a buddy with a 351w built beyond belief (close to 450 at the wheels) and he gets 15mpg with a holley fuel regulator and msd electronic ignitoin and 8,000 rpm ignition box..this stuff aint the cheapest but i believe it will pay itself off
Posting Guru
Joined: May 2010
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From: Alton, MO
EFI conversions are pretty pricy, but i have read a couple "testimonials" and heard of people with BB's getting 40% fuel mileage increase. that would put 10-11 mpg (which im assuming is about what you're getting) at around 14-15 mpg...electronic ignition might help you out, along with a fuel regulator. I have a buddy with a 351w built beyond belief (close to 450 at the wheels) and he gets 15mpg with a holley fuel regulator and msd electronic ignitoin and 8,000 rpm ignition box..this stuff aint the cheapest but i believe it will pay itself off
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Thread Starter
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Senior User
Joined: Jan 2011
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From: North Georgia
Hmm... your still pushin a brick through the air,,, these weren't designed with mileage or aeromatics (from Cars movie) in mind,,, although,,, I have avg. 16-17 with my 66 F250, had a 300 I6, holley 390cfm, Offenhauser 4bbl intake and Hedman headers, truck had NP435 and 4.10s and that was driving in Orange county/Riverside and about,,, keepin it around 55-62,,, so if ya drive nice, you could get close,,, and FI should help a bit,,
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Senior User
Joined: Jan 2011
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From: North Georgia
do you have a link to this project?
Posting Guru
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From: Alton, MO
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From: North Georgia
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Joined: Oct 2011
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Car diff.
A potential remedy if you only use it as a daily driver or light hauling is to check the salvage yards for a fairly high geared 3rd. member to put in that rear end. Yours is likely 3.50 or lower, many cars are 3.00, 2.73, and similar.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
I have a bud in S. Raleigh that installed a 4.6 from a Lincoln and can get 22mpg. It is not a simple upgrade but is doable.
A EFI 5.0/AOD might be an easier upgrade and do pretty good on the mpgs.
John
A EFI 5.0/AOD might be an easier upgrade and do pretty good on the mpgs.
John