well thats what im asking, will the boost be wildly fluctuating with the light coming on, the wastegate opening and boost dropping, thus turning of the peak light, closing the selenoid, raising the boost again, ect, ect, ect making the boost flutter up and down?

Ok, so then I would need another power source for the selenoid. Would 12v from the battery work?

So I was thinking about making my own electronic boost controller using the prosport elite boost gauge with the peak/warn function. What I want to do is use the peak light as a signal line to open a selenoid to the wastegate. Any input on this? comments? Concerns? before I destroy a perfectly...