Site News -
8/4: More AI Bot News |
7/31: How to Fix Site Errors 403 |
5/10: Members: Log In to See Fewer Ads!
[General |
Members |
C900 |
9000 |
NG900 & OG93 |
93 |
95 |
NG95 |
99 |
Sonett |
Vintage Models |
Clubs |
Other Cars |
FAQs |
Gifts |
Member Photo Galleries |
Member Directory |
Classifieds |
Manuals |
*Buddy Registry |
*Mileage Registry |
Polls |
What's New |
Raffle |
Photo of the Month |
Sponsors]
1 bar of "boost" means an absolute manifold pressure of TWO bar (one bar atmospheric at sea level, plus one bar of boost = 2 bar).
That line between the white and yellow, where the boost needle sits when the car is off is representative of ambient atmospheric pressure, or an absolute manifold pressure of 1 bar (at sea level).
Actually, IIRC, 1 bar is not always the same thing as sea level pressure.
ANY throttled motor, turbocharged or not, will pull the needle into the white area to the left at idle or run-on, and move towards the right end of the white when you go to full throttle (it's called a vacuum gauge on a non-turbo, and goes from 30 to zero...). The difference is a turbocharged motor pushes more air into the inlet manifold and makes the needle move into the yellow as the boost pressure rises.
The OP's problem is that the boost is leaking out someplace. Often the leak is small, and under vacuum, will "seal" itself, but under any kind of boost, opens and dumps the boost pressure.
_______________________________________
Current:
2002 9-5 Aero Kombi Cosmic Blue
2000 9-5 SE sedan, Imola Red
1990 900S Rose Quartz, Auto
Past:
1999 9-5 LPT Combi
1999 9-5 LPT sedan
2002 9-5 Arc
1990 900 5-speed
1986 900 turbo Convertible
1991 9000 turbo
1980 99 GLi
1986 900 turbo
1986 900 S
1991 900 turbo
1984 900 turbo
1976 99 GL
Posts in this Thread:
- Atmospheric Boost, JimO, Sat, 25 Jul 2009 06:55:48
- Re: Atmospheric Boost, JimO, Sun, 26 Jul 2009 08:41:50
- boost leak, Mr. Bubble, Sat, 25 Jul 2009 12:16:27
- It's boost, Jim, but not as we know it >, Bill Davies, Sat, 25 Jul 2009 07:29:03
- Re: It's boost, Jim, but not as we know it >, Larry West
, Mon, 27 Jul 2009 08:35:55- Correction..., Larry West , Mon, 27 Jul 2009 08:43:03 <-- Viewing This Message
- Re: It's boost, Jim, but not as we know it >, JimO, Sat, 25 Jul 2009 11:00:30
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup
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.
StateOfNine.com
 |
SaabClub.com
 |
Jak Stoll Performance
 |
M Car Covers
 |
Ad Available
 |
Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right.
Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY.
Classifieds are to be listed in The Saab Network Classifieds pages.
This is a problem solving forum for over 250,000 Saab owners, so expect to see
problems discussed here even though our cars are generally very reliable. This is not an anything goes
type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the
Saabnet.com Mission and Purpose Page. Please remember that you are
not anonymous. Site Contact | Site Donations | Other Sites by SP -
Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot
Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all
the Site Membership Benefits!
[Profile/Gallery]
(more from Larry West) on Mon, 27 Jul 2009 08:43:03
