![]() If it somehow fails in the energized position, it will bleed as much air as the stock restrictor will allow, but never absolutely stop pressure from getting to the WG. However, the same general risk is present with the stock solenoid in a bleed setup. The moment after the solenoid is energized, any air pressure on the wastegate blows back out to the intake/atmosphere, releaving any air pressure on the wastegate.ĭownsides: If the solenoid fails in the energized position, your wastegate will NOT open. When energized, the solenoid blocks pressure from the charge air from reaching the WG, so the WG sees the pressure from the intake or atmosphere. So a little background on how this works.Īt rest, the solenoid allows the wastegate to see all boost pressure. It is "technically" the right thing to do in a MAF, metered air system. Personally, since the line is already on the car, I say go ahead and use it. You will need to block off the line that goes to your intake, though, as it exists in the stock system. The GM solenoid comes with a small filter on this port out of the box, so just leave it on if you wish to port to atmosphere. Port 3 (optional): Just vent to atmosphere, but you should put a filter on it in case of reversal of flow. Port 1: To turbocharger, or optionally another line on the charge air side. No air can travel from Port 1 to 3, or 2 to 3.Įnergized: Port 2 and 3 allow air to pass. I hooked up the + to the yellow line.Īt rest: Port 1 and 2 allow air to pass. ![]() I don't believe the solenoid is polarity sensitive, but there is a small + on the case of the solenoid. Port 1: Silver plug, by itself on one end. You could potentially use one or two, but I won't be covering that. I don't believe they are necessary at all with a blocking-type setup, which is what I went for. Parts: GM boost solenoid for Typhoon, GM Part # 1997152Įxtra vacuum hose (I used about 3 feet, purchased 4 feet from Autozone for $3.35) ![]() I take no credit for figuring any of this stuff out or pioneering any part of this mod. It would have helped me to have all this info in one post. To help out, I'm going to cover the whole setup, top to bottom in a nice single post to help those out who are going to do this in the future. First, thanks to all those who participated in the discussion of this mod, those who posted part #'s, tried it out first, etc. ![]()
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