[masraum]

Originally Posted by rfuerst911sc

Aprox how much did you put in ? Congrats on initial positive results . Hopefully long term success also . Regarding the black foam from the vents . Do an internet search there is tons of info out there .

In a nutshell you have two blend doors in the dash HVAC housing . One controls AC/heat the other controls defrost/dash/floor air movement . Porsche/VW/Audi/BMW and others in their infinite engineering wisdom made the blend doors out of aluminum with holes in them .

The holes vary in size from aprox a quarter to half dollar in size . There are also rectangular holes . The OEM's then decided to cover the holes with foam . The foam they used is crap and breaks down . That's what comes out of the vents . When enough foam disintegrates the blend doors are basically useless . And of course this affects the efficiency of the system .

I've had a ton of foam come out of mine. It's a PITA. The AC still works. It seems like the most noticeable impact is that you get some air out of all 3 locations (defrost, floor, dash) although most of the air still seems to go the direction that you want.