Ah. After reading these additional descriptions and going back and staring at the photos some more, I think I have a pretty good idea where the foam is. Do I understand correctly that you got the foam all the way to the top of the open space, even though the foam was able to flow past the wheel wells?
What flavor of
Great Stuff did you use? Apparently some types expand more than others. Were you able to buy it locally?
There are plenty of "consumer" grade sound-absorbing foam mats available out there. Dynamat sells a few varieties, usually with "liner" in their name. "TacMat" is also a foam product.
Here's their web page. (Note: Dynamat-brand products are IMO horribly overpriced. I'd buy their competitor's products instead. For instance,
B-Quiet seems to have some reasonably priced stuff.)
-Dave
