pics of my grille block experiment...
 

Rough template:
https://home.woh.rr.com/slurp812/gb1.jpg


first cardboard total lower grille block:
https://home.woh.rr.com/slurp812/gb2.jpg

Stuff I used to make up the aluminum one:
https://home.woh.rr.com/slurp812/gb3.jpg


Here is the aluminum one on the car, ready for my drive to work tomorrow!:
https://home.woh.rr.com/slurp812/gb4.jpg

With the first cardboard one, it got kinda warm after a short trip, so I went with the small opening. i didn't even measure it yet. It looks to be about 5x7 inches...

let us know how it does tomorrow :thumbup:

That looks really good, let us know how much better your FE is

That's really nice looking! I enjoy seeing ideas I can use on my own car.

That looks awesome. I'd love to see a picture in daylight from further away, I bet it's barely noticable.

it does seem to do a little better, but Iv changed the spark plugs also. And just recently had a trip about 5-600 miles, and messed up on filling up at foreign pumps. My numbers have been erratic. But usually now around 37. But weather has been warmer also. so many variables. But small steps in the right direction...

I have a question,

if you place that block further in (not flush) will it still improve aerodynamics??

I want to know because I want mine as inconspicuous as can be...

probably but its really hard to say and it all depends on how far back you place it.
i honestly didnt see much mpg with the grill block. but i also go over 65 for maybe 20 miles in an entire tank.

it will help

... insightful...