Newbie From Phx AZ Eco1966F250

[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.

[gone-ot]

* 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.

[Eco1966F250]

Originally Posted by Old Tele man

* 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.

[Eco1966F250]

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 . .

[rmay635703]

Lowering the truck will improve fe more than an air dam alone

[Eco1966F250]

Originally Posted by rmay635703

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".

[Eco1966F250]

Air dam is less than 3" off ground

[Eco1966F250]

No more room for lowering.





Already had to raise the box floor 6"

[bhazard]

What's powering it?

[Daox]

Welcome to the site.

I agree, whats under the hood?