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Date: Thu, 19 Apr 2007 20:19:30 GMT
From: Paul Halliday <pjghnospamyonder.co.uk>
Subject: Re: Where does small baby hose from top of Bypass valve go do??


in article C24D8CDC.827F%pjghnospamyonder.co.uk, Paul Halliday at pjghnospamyonder.co.uk wrote on 19/04/2007 21:17: > in article f05mka$6ho$1nospam6.zwoll1.ov.home.nl, MH at nonospamo wrote on > 18/04/2007 19:00: > >>> In fact, on the later 9-3 Viggen model, the valve is actually fitted from >>> the >>> factory "the wrong way round". >> >> This is how it's placed in our '95 900SE; >> http://upload.wikimedia.org/wikipedia/commons/6/64/SaabB204engine.jpg >> >> I do not know if that is the 'wrong' way around or not. > > That is in what is called the "correct" orientation. Notice how the valve is > orientated so the internal bung and spring actuate perpendicular to the > charge air. The smaller vac hose rapidly sucks the top of the valve when the > pressure drops out of boost. > > On some later SAABs (and other turbo cars), the valve is placed the other > way around, so the charge air cannot technically act upon the underside of > the internal bung. The valve is purely actuated by vacuum. Duh! Forgot to attach the pictures :) Like this: <http://www.trollhattansaab.net/images/viggen/Saab%20Viggen%20engine%20small .jpg> ... Or this: <http://www.people.cornell.edu/pages/pmm12/Saab/SaabEngineBay> Paul 1989 900 Turbo S http://saab.go.dyndns.org/

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