Yeah I'd have to say there is a pretty good amount of weight to be shaved behind the dash. I have an extra one I've been working with and if you removed alot of the brackets and vents, I'd say you're getting close to 10-15 pounds removed from the originial weight of the car.
The past week or so I've been tucking some wires around and converting soem lines to SS set-up. Something to do before I put in a new manifold and spray the egine bay. It's not finished this is just the 1st stage of my engine bay clean-up. Just moving things around and out to create more room for when I mold, paint, etc..
Overall with some guesstimate weighing, I'd say a good 15-20 pounds came out of my engine bay. It wasn't just me weighing it either it was also some friends so thats a estimate on the low side. Not to mention the AC charger and accessories I removed.
These were taken out of the bay...
from here..
and here..
I didn't get close enough pictuires to show what wires I tucked away but I haven't even touched any of the EVAP or charging systems in the paseneger side wheel well. Once all that gets removed I'm putting some catch cans in there.. I tucked the main harness underneath the battery tray and moved the fuse box and ecu harness down behind the IM and around the battery up to to another location with some new brackets I made. Much lighter then the stockers.
Overall, I've pulled about 55 pounds from the engine bay of the car. That's even excluding the carbon fiber hood.
DSM-ZERO- sorry if it looks like I'm hijacking the thread. It's just comething relevant to our cars and your car at the same time. Paul if you have a problem with this post here just move it or make it a new thread/sticky.. Thanks guys..