Date: Fri, 17 Jan 2003 10:20:54 +1100 From: "Brett Thear" <bthear10nopsamond.com> Subject: Re: bypass valve for saab 900LPT
You can get BOV's that are a hybrid of both atmospheric and plum-back. This is supposed to stop problems with air sensors, as some of the air is recirculated, yet you still get the noise. Go Fast Bits make two types: the hybrid and the stealth. The stealth you can adjust the amount of plum-back or atmospheric that you want. All the best, Brett Thear "Atlantis" <usernopsamin.com> wrote in message news:b04s6e$nbv$1nopsam.ihug.co.nz... > If your car does have an air mass meter (I know nothing about Saabs), you > may find that your car will stall when you let off the accelerator, as the > computer is expecting a big rush of air from the turbo that it won't get > anymore, and in turn, screws up the fuel mixture causing your engine to > stall. > I have seen this happen on a few cars. > > If you have a car like mine with a MAP (manifold air pressure) sensor, you > needn't worry, as it is measured further down the inlet chain, and it won't > stall if you vent to atmosphere. > > Atlantis. > > "O_P" <protossinopsamail.com> wrote in message > news:01c2bc84$fdd27b90$e75b3a0anopsamb-va-w0598... > > Hi > > I just noticed my compressor bypass valve (CBV) has gone bad. This valve > > returns the air to the turbo compressor inlet for reuse. > > I would like to replace it with one that vents the pressurised air > directly > > to atmosphere.(blow off valve,BOV ??) Question is can I do this. There are > > some WWW-sites stating that this would confuse the air mass meter(AMM) > when > > you let the once measured air out of the system. > > A friend of mine told me that I shouldn't mind that, because the valve > > works only in a transient situation and in transient situation the AMM is > > ignored by the ECU which uses instead fixed control information stored in > > it's PROM. > > > > Has enybody used a BOV with a LUCAS ECU? > > > > some tech. details of my car > > > > SAAB 900 -92 > > > > ECU:LUCAS CU14, with BSR CHIP > > AMM: LUCAS (not hot wire type as far as I know) > > TURBO: Mitsubishi te05 > > no APC unit > > CHARGE set using a BLEEDER to 0.8 bar (originally 0,4) > > standard saab 900 IC (added) > > JR-filter > > > > O_P > > > >
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