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Old 03-24-2017, 03:13 PM   #1 (permalink)
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Eco1 - '66 Ford F250 Base

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Newbie From Phx AZ Eco1966F250

I have a 1966 F250 that is being built as a daily driver that would get much better MPG than a typical F250. In stock form with a 4.10 gear driving max of 65 mph on highway it was usually in the 10-12.5 MPG range.

The goal was to double that, which I have easily done.

But now looking for help in getting a proper front AirDam in place for starters.

I did a bunch of MPG testing but then moved on to seeing what it would do performance wise with tuning etc.

Now its back to AERO to achieve another goal in a 1/4 mile pass. I am now .037 away from a 12 second run. I was hoping I could achieve that with a bit of AERO.

Plan is to take this truck on a Lower 48 State tour in next couple years where MPG will be very important.

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Old 03-24-2017, 04:38 PM   #2 (permalink)
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* IF * you can get TWO different "mappings" for the ECM (switchable: one for normal, one for economy), you can (roughly) achieve both hauling and FE goals.
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Old 03-24-2017, 04:44 PM   #3 (permalink)
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Quote:
Originally Posted by Old Tele man View Post
* IF * you can get TWO different "mappings" for the ECM (switchable: one for normal, one for economy), you can (roughly) achieve both hauling and FE goals.
Right now I have a few different tunes. A Tow tune and a Power Tune. Initially I had a great MPG tune but of course as the power was turned up the MPG dropped. Now that it's close to the power output I can start another tune. Currently running E30 fuel for a Power tune which of course lost me 5 mpg minimum. Soon I will go back to the FE tune and normal 91 octane fuel.

Most interested in Aero for the front Air Dam now as part of build.

Engine Cu In dropped from 352 to 213.
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Old 03-24-2017, 04:50 PM   #4 (permalink)
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Without Air Dam



With Air Dam. Question is how much to be gained if I extend the airdam outward on each side.

It will not allow photo's until I have 5 or more posts . .
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Old 03-24-2017, 05:08 PM   #5 (permalink)
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Lowering the truck will improve fe more than an air dam alone
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Old 03-24-2017, 05:17 PM   #6 (permalink)
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Quote:
Originally Posted by rmay635703 View Post
Lowering the truck will improve fe more than an air dam alone
Truck suspension has already been lowered approx 5". Simply no room to go any lower. The cab and box are also channeled down over the chassis to lower it another 4".
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Old 03-24-2017, 05:19 PM   #7 (permalink)
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Air dam is less than 3" off ground
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Old 03-24-2017, 05:25 PM   #8 (permalink)
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No more room for lowering.





Already had to raise the box floor 6"


Last edited by Eco1966F250; 03-24-2017 at 05:30 PM..
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Old 03-24-2017, 06:43 PM   #9 (permalink)
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What's powering it?
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Old 03-24-2017, 06:45 PM   #10 (permalink)
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Welcome to the site.

I agree, whats under the hood?

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