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]

C900 Bulletin Board
1979-1993 & 94 Conv [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main C900 Bulletin Board | BBFAQ | Prev by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: Base Boost @ 9.5 PSI...Is she going to blow????
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by RS [Email] (#15) [Profile/Gallery] (more from RS) on Fri, 15 Aug 2003 05:05:48 Share Post by Email
In Reply to: Base Boost @ 9.5 PSI...Is she going to blow????, scottgf, Thu, 14 Aug 2003 20:22:57
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

9.5 for base boost is way too high. Since the APC solenoid clicks when you plug the box in, the APC box is getting power and controls the solenoid like it should when you power up.

The APC solenoid clicking at random, like you describe in your response to my last post, can mean one of a few things - pressure transducer has a worn spot on the windings, bad knock sensor, bad knock sensor cable and/or connector.

If you crank up the base boost so far that the APC can't kick it back any further to protect the engine (like you've done), the APC box kind of a black plastic brick with wires runing to it.

Before you go into tuning-for-performance mode, you may want to turn base boost back to the factory-recommended settings and track down the real problem. Then you'll know what the car can really do *and* when you do tuning-for-performance, the APC box will have the proper safeguards (like a working knock sensor) to keep you from melting piston crowns.

Off the line, C900Ts generally aren't something to write Road and Track about. At highway speeds, they are.

Since you're a SAAB newbie, you probably don't know about the infamous C900 transmission. The transmission is the weak point in the car. It was only designed for 100ish Hp. And a stock '87 900T puts out around 165 Hp. The more power you feed the transmission, the more the pinion bearing is going to be beaten on - when that starts to go, it can wreak all sorts of havoc to transmission internals over the long term. There are rebuilds and enhancements around, but everything costs money.

Here's a link to a Volvo page that shows a burned piston from detonation. Hopefully the pictures will be there when you go to it. And if they aren't there, the text should give you something to think about.

posted by 63.148.1...

http://hjem.get2net.dk/bengaard/engine.htm#Above%20are%20two%20pictures

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!