MAP and RPM adjustments

Hi, I could use some help with an adjustment of the Prop adjustment in regards to RPM and MAP. I did a search for MAP and RPM and did not come up with much.To start with I have Lionhearts Bellanca Super Viking Turbo. I also have the 260. I changed the 260 to a turbo and the prop works very well there. In the Viking turbo the RPM just keeps building and moving the Prop lever does no good unless you move the throttle way down which lowers the MAP. I would like to keep the MAP up and move the RPM to less than red line.Can someone tell me what value in the config file would do this or what value I would change in FS edit?Thanks for any helpDan