You can run 20-30 psi with no issues, although it is way out of the compressor effeciency range. I would suggest running 20 psi. I would realy discourage running more boost without having a 2.5" downpipe and freeflowing exhaust. Stock boost is around 10psi. I use an electronic boost controller setup that works really well for me and you can adjust the boost from inside the cockpit! Check out malones original 1.6td thread to get an idea of what I am talking about http://www.vwdiesel.net/phpBB/viewtopic.php?t=1352&highlight=Excuse the ghettoness there but you get the idea. Passenger Performance will be offering an easy install your self electronic boost controller kit very soon for our IDI engines including an aluminum block off plate for the inatke manifold.
You can run 20-30 psi with no issues, although it is way out of the compressor effeciency range.
i just hope your a little more careful when the time comes to change your blinker fluid.
Is downpipe in Golf 1.6 GTD with SB engine and intercooler (Europe) bigger than downpipe in normal TD? Is it good to make bigger exhaust? Will I get any increase of power?