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Re: LPT question for JustinHiFi
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Posted by JustinHiFi [Email] (#829) [Profile/Gallery] (more from JustinHiFi) on Wed, 10 Dec 2003 18:47:05 Share Post by Email
In Reply to: Re: LPT question for JustinHiFi, MEB, Wed, 10 Dec 2003 17:49:46
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I am just going to answer it on here, so maybe someone else can pickup on the info if needed.

Okay, as far as the signal (vacuum line) for the wastegate goes it needs to be hooked to the small hose nipple on the inlet side of the turbo housing. I guess that you can hook it up downstream, but the pressure will be the same, it actually will most likely be lower as the intercooler will cause a small pressure drop in the system.

Blow off Valves and Bypass Valves are similar as well as different. A bypass valve will stay open while the engine is under vacuum, and will close when the engine is under boost. When the throttle slams shut, the valve quickly opens to vent the pressurized air back into the intake system before the turbo.

A blow off valve is somewhat opposite. It remains closed while the engine is under boost and vaccum, but only opens when there is a larger pressure difference between the intake manifold (vaccum;pulling), and the intake piping(pressurised;pushing). This will cause the valve to open and release the pressured air vent to the atmosphere.

This venting occurs each time I am into boost, then get off the throttle. So basically every time I shift, if I am into boost:-)

JustinHiFi

TOOK MY LAST FINAL EXAM TODAY! WOO HOO! Now to the 5 papers before Friday...

posted by 205.133.147... 
_______________________________________
JustinHiFi
Strictly Saab Inc.
Melbourne, FL

Current:
-1991 900 S-PG MT
-2001 9-5 Wagon AT
-2006 9-3 SS AT

Past:
-1964 96 2-Smoke MT
-1967 96 v4 MT
-1983 900 Turbo MT
-1985 900 SPG MT
-1988 9000 Turbo Black MT
-1988 9000 Turbo White AT
-1990 900 SPG Red MT
-1990 900 SPG Black MT 
-1991 9000 Turbo MT
-1991 900 SPG Red MT
-1992 9000 Griffin AT 
-2000 9-5 Aero Sedan MT
-2001 9-5 Aero Wagon MT
-2008 9-3 2.0T Sedan AT
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