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Car Forum / Saab Cars / September 2004Saab 9000 Carlsson
I have just bought a 1993 9000CS Carlsson (at least thats what the badge on the car says, the registration document does not mention the Carlsson bit at all). I have noticed that the turbo boost pressure goes completely off the scale of the boost pressure guage if you plant your right foot firmly in any gear. I have also noticed that a section of metal tubing has been inserted into one of the tubes running from the turbo to the dump valve and a small hole (1mm - 2mm) has been drilled in this piece of metal tubing. I suspect this is related to the behavior of the turbo and I wonder if it is a "boy racer" modification o stop the waste gate valve or dump valve from performing its normal function and thereby keep the turbo blowing even when the boost pressure is higher than Saabs designed it to be. Anyone know anything about this one? Cheers Paul BJ > I have just bought a 1993 9000CS Carlsson (at least thats what the badge on > the car says, the registration document does not mention the Carlsson bit at > all). Am I an anorak or what? 9000 CS Carlsson was MY 1989-1992. > I have just bought a 1993 9000CS Carlsson (at least thats what the badge on > the car says, the registration document does not mention the Carlsson bit at > all). The Carlsson bit will be self-evident. Do you have Carlsson logos on the rear sides and boot? Red stripe down the side of the car? The 9K Carly is quite a babe :) > I have noticed that the turbo boost pressure goes completely off the scale > of the boost pressure guage if you plant your right foot firmly in any gear. [quoted text clipped - 6 lines] > pressure is higher than Saabs designed it to be. Anyone know anything about > this one? The biro pen in the wastegate pipe with drilled holes trick is nasty. Remove it. Off the scale means your car is boosting well beyond the limits of the internal computer (APC). Your engine will be knocking. Okay, it's fun but if you want the car to last (or avoid expensive gearbox rebuilds), get rid of that metal tube. If you're interesting in attaching a knock sensor LED to your car, so you can see if it's knocking please take a look at http://www.900aero.com/ - it's a superb resource for understanding the SAAB APC system. The site also deals with how to "mod" your turbo/knock computer to get better (and safe) performance, without bypassing SAAB's on-board turbo controller. If you do decide to bypass the APC system (using a proper MBC, rather than a cheap hack), the knock LED will alert you to fuelling and charge cooling problems very quickly. http://www.saab9000.com/ is also a good resource, run by IIUC a chap called Bill Jones who owns a *very* fast 9000 Aero - 5.5 second 0-60!!! Paul 1989 900 Turbo S http://saab.go.dyndns.org/ OK As a temporary measure I have just wrapped the offending piece of tubing in about 10 layers of insulating tape. A test drive shows that the turbo boost is now well within limits an fact it doesn't even make it into the orange section. Performance is massively impacted; it is not even as vaguely as fast as my 1991 9000S 2.3 FPT, it performs more like an LPT, but I would rather have that than a dead engine. I believe there is an adjustment on the waste gate actuator arm that can increase the boost pressure (?). Logos....I have one Carlsson logo on the rear of the car, nothing on the sides or the front but I do have a logo embeded in the steering wheel that says Carlsson. There is no body stripe. It lacks the all round body skirt that the my previous Carlsson sported and it also lacks the rock hard suspension that the other Carlsson had. It does however have the wing style spoiler on the boot lid. Is this a Carlsson or a standard CS that has been "re-badged" and seemingly badly tweaked. Cheers Paul BJ > > I have just bought a 1993 9000CS Carlsson (at least thats what the badge on > > the car says, the registration document does not mention the Carlsson bit at [quoted text clipped - 37 lines] > 1989 900 Turbo S > http://saab.go.dyndns.org/ This is a trionic car, no? '93 was a switchover year. Regardless, do the standard BPC valve check (disconnect for wildly uncontrolled boost) If so, replace BPC valve. There are other things, but this is common. KeithG > OK > [quoted text clipped - 104 lines] >>1989 900 Turbo S >>http://saab.go.dyndns.org/ > A test drive shows that the turbo boost > is now well within limits an fact it doesn't even make it into the orange > section. Sounds like you may now be on base boost only then, or even less. Sounds like the pipe was a bodge. Is there a small broken section on the 9000 boost gauge, like there is on the 900, just before the orange section? That equates to atmospheric pressure (when it goes past that, the turbo is pushing harder than atmosperic). If it goes into the orange it is making some boost. If it doesn't go beyond the broken section, and into the orange, then it sounds like the wastegate may be jammed open, or even disconnected (sometimes if the clip holding the wastegate actuator rod to the internal wastegate corrodes or has been pulled off, the rod will fall off the spindle, and the gate will flap open at atmospheric pressure, because nothing holds it shut). That sounds like what you are suffering from, even if that isn't the actual problem.  SignatureCarl Robson (The poster formerly known as Skodapilot) http://www.bouncing-czechs.com > > I have just bought a 1993 9000CS Carlsson (at least thats what the badge on > > the car says, the registration document does not mention the Carlsson bit at > > all). <snip> > If you're interesting in attaching a knock sensor LED to your car, so you > can see if it's knocking please take a look at http://www.900aero.com/ - > it's a superb resource for understanding the SAAB APC system. I did find this site very interesting and I do plan to read more. I am trying to fix the APC right now on my 86 900 Turbo (not Aero or SPG). I could not find the LED on the knock detector thing and I am very interested. Please give more specific info, Thanks, Charles. >>> I have just bought a 1993 9000CS Carlsson (at least thats what the badge on >>> the car says, the registration document does not mention the Carlsson bit at [quoted text clipped - 13 lines] > > Please give more specific info, You need to connect an LED to pin 19 and to a 12V source. Pin 19 goes to ground when the knock sensor sees knock. The LED can be mounted on your dash. Paul > You need to connect an LED to pin 19 and to a 12V source. Pin > 19 goes to ground when the knock sensor sees knock. The LED can > be mounted on your dash. Just talking general principles here: ensure there is a resistor (or some device) to limit the current drawn by the LED. Putting the full 12v across it could prove lively, for a short time. If that pin 19 is limited to a current suited to small LEDs (varies with the type), okay. And, of course, get LED polarity right. (Did I miss something? Oh yes, wash your hands afterwards. <g>) -- Andrew Stephenson BINGO! The waste gate is jammed open. Overboost like this will blow the engine. Mark of ScandiaTek >I have just bought a 1993 9000CS Carlsson (at least thats what the badge >on [quoted text clipped - 19 lines] > > Paul BJ > BINGO! The waste gate is jammed open. Overboost like this will blow the > engine. > > Mark of ScandiaTek No it won't..... Cheers! Hi I am the guy with car....is this mod bad...very bad or really bad. I closed off the hole in the tube with insulating tape and now I being overtaken by old men on bicycles....turbo boost guage barely moves and performance is a joke! What to do now? Cheers Paul BJ > > BINGO! The waste gate is jammed open. Overboost like this will blow the > > engine. [quoted text clipped - 4 lines] > > Cheers! |
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