Oldschool 85, here's my 2 cents worth, take it for what you will (and I'm by no means the expert here). You will not be able to make your power goals if A) you have injectors that are smaller than 440s, and more than likely 550s will be in order, B) changing to a stand alone, or at the very least the Split Second MAF mode (as seen in the Group Buy section), C) you will definately have to change alot more, like the internals of the car etc......... Lots of people wanna make over 400hp (me included), but to do it right takes alot of time and money. If you take short cuts or try to skrimp on something, you ultimately won't be as happy and might have to rebuild a brand new engine. My recommendation spend some time reading all the posts in this site relating to engines and turbo conversions, also visit the Supraforums site, goto the MKII section, and hit the technical tab on the top, it also illustrates what is needed to convert a 5M into a turbo engine. Good luck.