rdeaner,
Here are the GPO Tables for 200 kpa and 240 kpa using a stock PWM SRT-4 solenoid valve (requires rewiring two connectors), and a Turbonetics Evolution Wastegate. It should give you a good starting point. The 200 kpa runs around 18 lbs and the 240 kpa around 20 lbs. Of course, your engines VE will probably be different, so careful!
200Kpa
240Kpa
[img][img]http://i110.photobucket.com/albums/n88/cool4now/240KpaBoostControl.gif[/img][/img]
Hope this helps.