[abefroman57]

just got a 2004 suburban with 197,000 miles on it. i drive 120 miles per day. I'm getting 18 - 19 on the highway.

I want to try a belly pan - does anyone sell one? where can I buy coroplast ???

I might also want to try a front air dam, filling in the foglight holes, side skirts (i.e ground effects ?)

would a lightened hood and hood scoop help with weight and engine cooling (getting the hot air out ?)

Also, I'm very interested in trying to get rid of the vacuum created off of the back of the suburban. I'm an engineer and I remember in a fluids class I took, I calculated that the drag created by the vacuum off of the back of a square vehicle is a large portion (30% or more) of the total drag on the vehicle. I'm looking for some type of spoiler that will direct the air coming off of the top, sides, or underneath of the back of the suburban into the space where the vacuum occurs. If you direct air into this area, you break up the vacuum and reduce drag.

anyone done this ? I'm going to remove the cross braces off of the roof rack and maybe see if I can modify one of them to direct air downward. I'd like to install it on the rear of the rack.

any suggestions about all of this ???

cheers