I've had the car 11 months and had the MBC on it from maybe Mar-Jul until I got irritated with the lack of hot weather protection and got a CSE setup. Recently I put the MBC back on before the BPC and set it for 10psi to get faster spoolup but also to have the protection in the 10-15psi range. Since it is cooler out I have had no problems, however I am thinking of turning the MBC down to 5psi or zero now that it's getting snowy, as the faster spoolup makes winter driving more fun... er... dangerous.

As for blowing up motors, I have had lots of turbo cars and done a good bit of tuning. In my case I am generally very well attuned to what the engine is doing so I rarely blow things up. I do not know of anyone personally with an MBC who has blown up a Saab engine, but I also do not know anyone personally who has boosted a Saab engine beyond stock performance.

I do know several people who have damaged engines with boost, actually detonation caused by too much boost, so I am pretty wary.

One issue I feel is a problem with the T25 spooling up so fast is something like tip-in detonation. I feel I experienced this on my car on hot days, where under moderate acceleration the boost gets up high quickly and into detonation in situations where you do not expect it. In this mode you are probably not in a WOT fuel map and more prone to detonation. In stop and go traffic on hot days it was difficult to live with the MBC.

I'd like to splice in a vacuum solenoid and a relay that would bypass the MBC so I could have a switch to select MBC/BPC, BPC, and base boost (BPC off) so I could just switch off the funny business on hot days or when the roads are slick, and even go to base boost if I loan out the car or something. That'd be a good setup.

-Joel.

posted by 128.138.14...

• Seriously thinking about getting a MBC, 9kSilverAero, Sat, 17 Nov 2007 15:46:11
  • Re: Seriously thinking about getting a MBC, Bill U, Sat, 17 Nov 2007 22:45:36
    • Re: Seriously thinking about getting a MBC, 9kSilverAero, Sun, 18 Nov 2007 02:24:25
      • Get an old, used BPC, turrbo , Sun, 18 Nov 2007 14:50:41
        • Re: Get an old, used BPC, 9kSilverAero, Sun, 18 Nov 2007 15:41:55
  • There's all sorts of opinions on the Performance BB, PeterH, Sat, 17 Nov 2007 17:34:05
    • Worst part on the 9000 is the BPC, 9kSilverAero, Sat, 17 Nov 2007 17:57:03
      • Re: Worst part on the 9000 is the BPC, saabjet, Sun, 18 Nov 2007 07:16:56
        • Please help me understand this, PeterH, Sun, 18 Nov 2007 12:09:52
          • Re: Please help me understand this, Saabjet, Sun, 18 Nov 2007 18:31:15
          • Re: Please help me understand this, Joel F, Sun, 18 Nov 2007 14:26:59
            • Joel, how long have you had the MBC?, 9kSilverAero, Sun, 18 Nov 2007 16:18:14
              • Not all of a year..., Joel F, Wed, 21 Nov 2007 09:12:46 <-- Viewing This Message
            • My $0.02, after 4 BPCs in 4 years, Noel, Sun, 18 Nov 2007 15:23:06
      • I may just go this direction for my daughter's '91, RayV, Sat, 17 Nov 2007 20:30:34

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.

• Prev by Date: wow...new turbo..., ryand, Wed, 21 Nov 2007 09:02:48
• Next by Date: I use siliCONE myself, works good so far..., Joel F, Wed, 21 Nov 2007 09:17:41
• Main 9000 Bulletin Board

StateOfNine.com

SaabClub.com

Jak Stoll Performance

M Car Covers

Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)