recirculating by-pass valve - Saab 9000 Bulletin Board - Saabnet.com
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recirculating by-pass valve
Posted by p-loc (more from p-loc) on Wed, 28 Feb 2001 00:10:50
In Reply to: Fortunately, I live in the same town as the Saab Saviour, Tim, Tue, 27 Feb 2001 21:28:52
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the recirculating compressor by-pass valve(or blow off valve,dump valve,or hooter valve) is used on turbo Saabs with L-Jetronic type fuel management(anything with an Air Mass Meter,or Mass Air Flow sensor as it's known everywhere else in the automotive world). It recirculates the air by-passing the turbo compressor back into the intake tract. Non-recirculating valves vent the air to the atmosphere. It's usually not recomended to use a non-recirculating valve with a mass air system, because the vented intake charge is metered air and can cause drivability problems. With a speed density fuel management system (based on intake pressure instead of mass), the non-recirculating set-up is usually the way to go. BTW... nothing lasts forever!
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