Date: Wed, 03 Aug 2005 20:05:18 GMT
From: "Al" <alistairdorenospamo.com>
Subject: Re: Manual Boost Control/Bleed Valve......


"Paul Halliday" <pjghnospamyonder.co.uk> wrote in message news:BF159B53.15641%pjghnospamyonder.co.uk... > in article ugbHe.68853$Pf3.33514nospamnews.blueyonder.co.uk, Al at > alistairdorenospamo.com wrote on 31/07/2005 22:20: > >> OK time to start a flame war! >> >> Genuinely thinking of one of these for my T16 Aero...... > > Finding the true cause of your basic boost oddity would be the ideal > scenario ... and then run an uprated APC box. > >> Gentlemen, >> start your flamethrowers. > > A cheap Dawes device would be a good start. I like those ones from > Turbosmart that can be actuated off a switch. I'm thinking of one for > artificially raising my basic boost to a suitable level for my uprated APC > box (which I only run occasionally). > > So long as you neuter the APC boost control function and keep things at a > "safe level" (read about 0.75 bar peak boost) and always use high octane > fuel, I can't see a problem. You can of course leave APC in there as a > mere > knock detector. Run an LED off a 12V source to the anode and a solder the > cathode side to pin 19 in the APC box. > > But ... Ideally, figuring out the problem properly would be good. Using > the > MBC as an interim solution should be okay ... So long as you keep things > quite standard. > > Paul > > 1989 900 Turbo S > http://saab.go.dyndns.org/ > Paul, great to finally meet you at the national on Saturday! Yeah, I'm going down the check and reset basic boost route first. I invested in a speedparts boost gauge from Elkparts, which I intend to fit at the weekend. I suspect a dodgy dump valve (again) so was fishing round for vac pipes this evening and managed to knock a couple off, cant see where they came from! Aaargh! Engine is hot now and the light is fading, so I'll have to use my wife's 9000 Anni' tomorrow, (how unfortunate) Tomorrow I'll be on a search and repair mission! Then I can finally check base boost, I'm pretty sure this is at the root of my problems. Tweaked APC's can happen when I'm happy with the rest of it. Got another recon AMM today, seems better (no boost improvement though) but car idles at 200-300rpm and stalls. So over to Phil and Phils when I've sorted out the vacuum pipes for a tune up. Cheers for now Al

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