Hi all,
I tried going "full hypermiler" a few years ago with my 2007 Toyota Matrix (base) and removed the rear seats and cargo area floor and spare tire a few years back. After a short while I put them all back. It was LOUD in my car, and I had problems using the cargo area w/o my shiz flying forwards.
Now, I'm trying round two. I have the spare tire, tire changing tools, and rear seats out, along with a bunch of other misc items, for 113.5 lbs of weight loss. I know from experience that my car will be louder w/ the rear seats out. I thought I might add a few pounds of Dynamat or other sound deadening material, but after removing the seats earlier this evening, I realized that there was some factory sound deadening material installed (see attached). Would adding some Dynamat on top of that help at all??...
A friend (non-hypermiler) said it sounded like I was trying to have my cake and eat it too.
He suggested maybe Dynamatting the wheel wells..
