Well its time. I'm in the market for one of these. List what you use and tell me what u think of them. How much?? I need one asap. AT the moment i'm looking at reasons why people spend big money on something so simple.... i'd rather pay someone to make me one if it will work.
Zener diode is the fastest and cheapest way to do it. Wires in to one of the MAP sensor wires in reverse, and doesn't let the MAP sensor ever see over 4.7V which means no more boost cut. Only problem is leaning out at high boost (which my car definitely doesn't do... I get down to 10:1 A/F ratio).