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Date: Wed, 09 Mar 2005 21:48:25 GMT
From: Paul Halliday <pjghnospamyonder.co.uk>
Subject: Re: Oil Catch Tank


in article MYEXd.209$194.159nospamfe2-gui.ntli.net, chris at werwenospamcom wrote on 09/03/2005 15:52: > > "Robert" <rxobert.bxrownnospampnet.se> wrote in message > news:qpqXd.132043$dP1.470895nospamc.telia.net... >> Paul Halliday wrote: >>> I'm looking for an oil catch tank solution for the crankcase ventilation >>> system on my 1989 900 T8. I'm getting oil dripping down onto the fuel >>> metering plate and into the airbox. I'd like to (a) stop it and (b) get a >>> handle on how much oil ... I don't seem to need to top up at all really; >>> maybe a "gloop" now and again. >> ----8<----cut--- >> >> Paul, I've had oil drops come from the valve cover ventilation hose to the >> air filter canister and clog the filter on my cars. But this was on single >> carb 900 and 99 cars (had one of each). >> > > I think nearly all of my 8v 99/900's carb or injection had some small amount > of oil in the airbox. > > suppose you could vent to atmosphere.... Yeah ... But I'm getting oil actually on the fuel metering plate and I'm not sure that's a "good thing" :( I've actually just this minute tried a VTA test. I blocked up the vac line at the intake manifold and the end of the hose that comes from the top of the crankcase. I then stuffed a breather filter into the hole and .... It stalled ... I adjusted the throttle stop screw and it seemed to idle okay. What happens then? Is that okay? Can anyone see any problems with that? Ideally, I'd like to put a catch tank inline into the system. So, idiot questions: 1. What does the vac line *actually* do? Yes, I know it sucks at idle and prevents boost entering the crankcase by using a one-way valve ... But what does it actually do? 2. Do I need it? Can I just stump up the basic idle and have done with that part of the system? If so ... Do I need to do the catch tank installation, or is venting to atmosphere okay? I know there's a performance gain associated with doing that, but I have a road car not a track car! Paul 1989 900 Turbo S http://saab.go.dyndns.org/

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