1999-2009 [Subscribe to Daily Digest] |
The ECU's also do adaption and trim to accommodate the different sensors, MAF, ETS, intake air temp, MAP sensors, O2 sensors etc. These sensors may drift over time perhaps this explains some of this. The brain reset forces the ECU to make a fresh start. Many things unknown.
We have two grey 9-5 Aero's. Mine is 2003 80,000 miles.
I had a '95 900 SE and did a lot of mods and was very active in that forum. I conceived the MBC+A and worked Jeff in Atlanta. He did the work to find a low range pressure regulator that would survive under hood conditions. He was selling kits for quite a while. Prior to that I made up a pop-off valve to blow off MBC boost peaks. Its was controlled by a small pressure regulator; pneumo-adjustable pop-off valve. That was all complicated and not suitable for DIY; had braised fittings etc. That led to the anticipator to deal with the problem at the WG actuator instead of the intake manifold. The problem with the MBC is that things are changing too fast. The MBC cannot open the WG fast enough. The anticipator pressurizes the WGA via the adjustable pressure regulator. Then when the MBC starts to flow, the WGA is already up to pressure and ready to respond. Without the anticipator the MBC needs to flow enough air to get the WGA up to cracking pressure before anything happens, and that creates the delay and the WGA moves too late and you get over-pressure and fuel cuts. The MBC+A controls boost at the point where it gets its air. If it gets air from near the turbo, the manifold pressure will be less from pressure drops across the IC etc. The MBC+A works so well, that you can feed it pressure from before or after the throttle plate. If you did that with just a MBC, the signal delay would make things worse. With the MBC+A, you can get boost pressures that are very close to the fuel cut pressure, so you really get a lot more power than you can achieve with a MBC. Note to others: all of this applies only to T5 systems and has no application to T7 systems! My NG900 was totalled, got rear-ended. So I did not have a T5 to work with and could not implement the MBC+A myself.
NG900 only: I had Koni adjustables, front subframe brace, rack brace etc. The front struts have inadequate travel and one is sitting on the bump stops in hard corners. I hacked off around 1.25 -1.5 inches of the bump stops to get more damped travel and that really seemed to be good. Brad at Georges Imports gets credit for that understanding. One might argue that this would lead to excess body roll. Perhaps, but when one has a thick rear sway bar, that is never going to be a problem. I did my own front end alignment work for toe-in. I found that there was a sweet spot where cornering was fantastic. If off a little bit from there and it was not the same. I have not been into performance issues for 9 years.
posted by 64.216.106...
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
