The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 7/1: Members: Log In to See Fewer Ads! | 5/28: SAAB Evolutions/TSN T-Shirts $14
[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]

NG900 & OG93 Bulletin Board
1994-2002 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main NG900 & OG93 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
checking turbo performance(long)
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by ckpaden (more from ckpaden) on Sun, 2 Feb 2003 16:49:09 Share Post by Email
In Reply to: Re: Poor Performance on turbo, ckpaden, Sun, 2 Feb 2003 12:42:23
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Stock turbo boost spec's
***********************************************************************
Reverse 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear Basic Boost
0.54 bar 0.54 bar 0.54 bar 0.72 bar 0.72 bar 0.72 bar 0.40 +/- 0.03

Pressure Switch Operation
1.15 bar

Speed Limitation
230 km/h (143 mph)


***********************************************************************
How to check boost pressure
Carry out a full throttle acceleration in gear at an rpm below 1500 rpm. When the rpm is getting close to 3000 rpm, press on the brake pedal at the same time as you keep the accelerator pedal fully depressed, so that you obtain full load at 3000 rpm. Read the basic boost pressure on the boost gauge. A helpful hint here is to bring someone along who can keep there eyes on the boost gauge while you keep your eyes on the road. If the boost pressure is outside the tolerance limits then adjust basic boost pressure.


**********************************************************************
Checking for faulty boost controll panel(BCP)
1. Blow into the hose from the turbocharger marked (C) and check that air comes out of the hose to the wastegate's diaphragm unit which is marked(W).

2. Blow into the return hose from the intake pipe marked (R) and check that air comes out of the hose to the wastegate's diaphragm unit again marked(W).

If this BCP does not work in this function then it needs to be replaced.


*************************************************************************
Spark plugs

Spark Plug Type NGK BCPR 7 ES
Electrode Gap 1.0 Nm
Tightening Torque 27 Nm

Remember the check the gaps before putting in the plugs or you could get misfiring.


***********************************************************************
Oxygen sensors

Throttle response and boost can also be affected by slow reading oxygens sensors. The ng900 is known also for having slowing reading oxygen sensors. The only way I know of checking this is through a tech 2. Mybe someone else will have some suggestions.

Resistance/Temperature Control Range
2.0 +0.5 (PTC) -0.2 ohms at 20 deg C 0-1 V
Resistance between pins 1-2. Pins 3 and 4 are gold plated.


************************************************************************
Checking the wastegate

If it is not possible to adjust the basic boost pressure check as follows:

1 Check that the pressure rod can be moved freely and does not jam. It should move in and out freely.

2 Check the diaphragm and spring by pumping up pressure via the units connection nipple. Check that the rod is pressed out without any tendency to jam. Release the pressure and check that the rod is pulled back into the unit.

Change the unit if faulty.


*************************************************************************
Bypass valve

If the bypass valve is old it may not still be capable of handling the boost pressure and prematurely open up causing a reduction in boost pressure. I really do not know of any sure way of checking this with trail and error.



posted by 172.129.101...
Posts in this Thread:
Alert me when someone posts in this thread:
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.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



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)
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!