Test results from tray

I've driven with the under body tray for a week and 1 tank of gas so far. My gas mileage was 30.8 and the speed down the "hill" was the same (around 68mph) . So there was no noticeable change plus or minus from the under body tray. I'm curious if more air is flowing out my vents now or if the air through the radiator is going out the side through the wheel well. I don't know if sealing the engine bay by closing off the wheel wells to the engine bay will have a positive or negative effect. I'll be looking into adding an under body tray to cover the rear differential and seal off the underside of the rear bumper.

Underbody tray

I installed a underbody tray to cover the bottom side of the engine compartment.
There is a small lip spoiler in the front so i took that off and then sandwiched the new tray in between that and the lip spoiler. There was a few solid chassis points that I bolted the tray to in the back. There is still an open area from the wheel well to the engine bay, so i wonder how effective this will be. I will be testing the effectiveness by the hill speed test and a weekly average mpg. I will be looking into a shield to seperate the wheel wells from the engine bay.

Progress

I got to work on the hard top today. First I bent a bar to form with the edge of the windshield. This requires a multiple bends in a 3D crescent shape.




Next I welded the 2 peices I bent to go from the body up from the windows to a bar across the top. This will form the top wear the hatch / trunk will hinge to.






Next I attached the windshield the bar to the window bars. After the welds this shape turned out to be a pretty strong shape.
I started to bend a bar from the window supports toward the trunk but this shape is very complex and I didn't have the time to attempt it.

Got Materials

I picked up the materials for making the new coupe style roof. I'm starting to bend the pieces and I will weld them the next time I'm at my shop.