Re: Stock Boost PSI for Viggen??? - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Stock Boost PSI for Viggen???
Posted by Brooks G (more from Brooks G) on Tue, 4 Aug 2009 06:52:58
In Reply to: Stock Boost PSI for Viggen???, RKM, Sun, 2 Aug 2009 20:41:30
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The information I recall is from my 2000 9-5 Aero which should apply to your Viggen as they has the same engine. The turbo is capable of producing 20 psi of boost but doesn't do this at low altitude or the engine will knock itself to death. At sea level the boost will be in the 12 to 14 psi range (depending on octane, temperature, etc.), rising as altitude increases up to 20 psi. This allows the engine to produce sea level horsepower and torque as altitude increases, something that doesn't happen with normally aspirated engines. These engines have to be close to 10,000 feet above sea level before the horsepower starts to drop off.
Brooks,
posted by 24.19.179...
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