The pump should make about 34PSI and the regulator is adjustable. Just make a search for the part number. There are tons of Porsche sites that will give you all the details.
Honestly I can not remember from which rate to which th pump regulates but I know that it was very well suited to the pump.
Hang on....I just found this ebay auction for the same regulator.
20-100 PSI
http://cgi.ebay.com/ebaymotors/ws/eB...category=33553
I am way too cheap.
Alex