My F250HD Air Dam

[Jetta90GL]

I added a grill block behind the grill with some coroplast. I cant seem to get photobucket to upload the pictures. Anyway, I managed 13.61 mpg on the last fill up with the grill block/air dam combo. My mpg is a lot more consistent now, my 4 fills with the air dam average to 13.3125 mpg. My average before the air dam was 12.2 mpg. My next aero additions will probably be a small belly pan coming from the bottom of the air dam, and some small fender skirts. Also I think WAI helps on this truck so I might add some ducting when I install my new shorty headers. A 1.1 mpg gain isn't what I was hoping for, but its the best consistent gain I've ever had on this truck.. and ill take it.

[Jetta90GL]

I finally got my grill block pics up:










It does seem to be helping the air dam. My last tank almost hit 15 mpg, but I also ran the gas gauge a little past "E" more than i usually do. So Ill have to see how the next tank turns out. I also had to open up a bit more than what the pics show to keep it from getting hot.

[Jay2TheRescue]

Originally Posted by Jetta90GL

A 1.1 mpg gain isn't what I was hoping for,

You realize on that vehicle its just shy of a 10% gain... Not too shabby in my eyes...

Nice work on your grille block.

-Jay

[Jetta90GL]

That's true, and it is the most consistent gain I've had so far. Now I just wish I wasn't out of town for weeks at a time so I could put finishing touches on it. I will be taking the air damn off for a couple weeks to have an alignment and new tires done. Should be interesting to see if mpg goes back down.

[Jay2TheRescue]

My brother in law said they almost had to take off my air dam extension to align The Beast, but said they managed to work around it.

-Jay