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Message
On my 91 turbo there is a vacuum pipe which comes out of the waste
gate and goes to the side of the turbo casing. It has a T for another
vacuum hose connection which goes to a solenoid in the stock installation. The
engine guy tells me that if this vacuum hose is open to the ambiant pressure,
then the wastegate will be open. If it's blocked, then the wastegate will close.
All I have to do to control the wastegate is fit a valve to this hose.
Assuming this is a hose
that goes from the wastegate actuator (big vacuum pot looking thing) to the
compressor side of the turbo, it's using pressure to open the
wastegate. If it's blocked, the wastegate opens at the actuator's normal
spring pressure. If you leave it open, the wastegate stays shut, and
pieces of apex seals start departing the engine
:-0
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To be clear, when I
said open, and blocked above, I was talking about the teed hose that runs
off to the solenoid. I'm assuming the main hose from the turbo to the
actuator is still connected.
Rusty
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