Click Banner for Details on this Saabnet.com Classified


[General | Members | C900 | 9000 | NG900 & OG93 | 92X | 93 | 95 | NG95 | 97X | 99 | Sonett | Vintage Models | Performance | Detail | Clubs & SOC | Other Cars | Books Movies & Music | Chat | FAQs | Gifts | Photos | Classifieds | Polls | Raffle | Sponsors]

Saab Model 99 Bulletin Board
1969-1984
Search:


[Main Saab Model 99 Bulletin Board | Post Followup | FAQ ] [ Prev by Date ] [ Next by Date ] Member Login / Signup [Most Recently Edited Saabnet.com Photo Galleries]
Re: 1978 99T Performance Issues
Posted by JesseP (more from JesseP) on Sun, 17 Jun 2012 11:31:10
In Reply to: 1978 99T Performance Issues, Pat, Fri, 15 Jun 2012 10:45:05

A new cat, hollow cat or straight pipe will help things some.

You need to make sure you don't have any basic CIS issues. I presume you've replace the fuel filter?

As for the CO tester I don't think you need one. If you want to verify your base mixture I think you can hook a dwell meter to the oxygen sensor leads. But to really understand your tuning through the power band your better off with a wide-band air-fuel gauge.

I'm presuming your in the US, and have working Lambda. Do you have a working throttle switch for lambda enrichment on your throttle body? Without enrichment your 99T will always run lean under boost. Even with lambda enrichment you may not get great power unless you modify or replace your warm-up regulator with an alternate such as one from an Audi. I had a warm-up regulator with vacuum enrichment custom built for my 99T, and have lamdba bypassed altogether.

posted by 76.204.12...

Posts in this Thread:
Members can receive an alert when someone posts in this thread.
Post a Followup

Name:
E-Mail: (Confidential & Secure - Not revealed to other users!)
Send me email when someone posts in this thread: (available to Members)

Subject:

Posting rules are simple - No for sale/wanted ads or live auctions may be here - use the classifieds.
You may not cross-post your message to multiple BBs.
Personal attacks, insults, or flaming are not allowed.
Posting any of this will result in an immediate loss of posting privileges on this site.
Site Members do not see any warning (red) text.

Message:

Optional Link URL: (e.g. http://www.saabnet.com/)
To promote your own Saab site here, you must have a link back to The Saab Network.
Link Title:
Optional Image URL: (e.g. http://www.saabnet.com/img.jpg)




The content on this site may not be republished without permission. Copyright © 1988-2012 - The Saab Network - saabnet.com.

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 Donations
Your address is: 50.19.155.235 - Using CCBot/2.0 - Logged.
Site Members do not see red text instructions, green links, and bottom of the page banners.
Click here to see all the Site Membership Benefits!