[a427sc]

There are a couple of differences in my set-up than yours, if I look closely at the pictures you put up. My seal was to the bottom of the hood, surrounding the scoop opening completely,with only a very small (>1" total) opening at the rear to accomodate a pair of crankcase vents. Yours appears to seal to the inside of the scoop, thus the missing front side. I guess my carb inlet is lower than yours ref hood. The blow over was caused by two events. I was going in excess of 155 mph at Watkins Glen with a scoop that is both higher and wider than the standard Cobra unit, thus introducing more air volume and pressure with no place to bleed off. There was also very high under hood temperatures as it was 90+ during the middle of the day and the run groups were 30 minutes long. The heat softened the foam and let it blow over (to the outside as it was). The wall is outside the foam, and glue was on the outside of the foam/inside the wall. Sorry for the confusion. Interesting idea the combination of high underhood pressure and carb vaccum pulling it in, but not in my case. Anyway, I use a 14" dropped base and a 4" element which protruded thru the hood, thus the high/wide scoop.

I would be concerned about the instabiity at 110 too. Aero has been addressed numerous times here before. My ERA runs in a decided nose down configuration with no spoilers, and a single racing screen. Was rock solid on a smooth race track well over 150 (maybe even as high as 165). On the street on a windy night is a different story.

Don