Kai, I think you are working TOO hard <IMG SRC="http://www.swedespeed.com/ubb/biggrin.gif">...Praz, I have a setup similiar to what you are talking about. I only switch it on high boost when some of the ricers pull up. But if you raise the boost, you probably will need to raise the fuel pressure. It's hard to tell, because every car is different and every driver is different. You could try the fuel pressure regulator-try Jegs for instance. They don't have any for Volvo- and this is a problem you will run into a lot-but most are universal, rail-mount, you just need to find fittings that will fit...And it's cool, i'm fairly new at this game too, so I have a lot to learn. It's kinda addictive though. Once you do one mod, then you gotta do something else. Most mods will affect something else, which affects something else...As far as installation, unfortunately, there is no C70 Speedparts Installations INC., so, you'll have to do some research on your own. If you have a mechanic you trust, ask him about local performance shops. Don't even bother going to the dealer, they wont do the custom mods you are talking about...I dont know if that helps, but it's a start.