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Old 17-09-2004, 07:48 PM
DuMaurier 7 DuMaurier 7 is offline
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Join Date: Nov 2003
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I have decided to bite the bullet and buy two DDS2 kits , one for each stage of injection. I will be utalizing the low flow "trip" thats available on each ,so that a low flow on either stage will disable my boost . One is wired to kill power to my controlers solenoid control valve and the other will trigger an electro / pneumatic valve that will be installed on the air supply to the TOP of the wastegates diaphragms . Once activated this valve will vent the air supply , thereby allowing the uninterrupted pressure on the underside of the diaphragms to cause the gates to be pushed open.
The sensing of the flows will take care of any blocked jet scenarios , once fault conditions are detected , the nevt valve will stay open and the wastegates solenoid will also go to the "failed " off position and vent any air that would have been routed to the top side of the gate.
I am also changing out my astegates springs to the lowest ones available , so my wastegate only boost pressure will move from 11.5 psi down to 3.5 psi , since 11.5 psi on a 91 lb/min turbo can still cause a lot of damage when /if things go wrong.
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