[Main Performance Bulletin Board | BBFAQ | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Re: Agreed... Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Justin VanAbrahams [Email] (#32) [Profile/Gallery] (more from Justin VanAbrahams) on Mon, 26 Mar 2001 06:56:19 In Reply to: Agreed..., Craig, Sun, 25 Mar 2001 20:33:20 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

Totally agreed on the gutted cat thing... in the case of my '80 900T it does have a straight pipe... the '88 9kt had a blown out cat. As for the richer mixture, I think I may have been unclear... The 02 sensor allows the system to run even tighter tolerances, and tends to err on the side of too lean over too rich. Sans O2 sensor, the system will tend to run slightly richer ... not much, but certainly some. You can observe this by disconnecting the O2 sensor on your car and watching the mixture change on an a:f meter. At idle, it's barely noticable, but especially under boost you can see a substantial change.

As for passing without a cat, it completely depends on where you are. Here in California, there is no bloody way in hell a Saab will pass without a cat, as we measure NOx here, and that catalytic converter is the *sole* method for controlling these emissions. My '88 9kt, with a 10k old engine, rebuilt tranny, new O2 sensor, new AMM, new injectors and an entirely new ignition system (coil, plugs, wires, cap & rotor) still bombed our emissions. HC and CO may have passed with a little tweaking (there were slightly outside maximums), but NOx were almost double the legal limit @ 2400ppm. That said, if the '88 was an '80, it would have passed... The controls in California get substantially tighter as the cars get newer. Once I got the cat replaced, emissions dropped to virtually unmeasurable... The tester guy commented on how clean the car was running... within ULEV standards!

-Justin

• What HP is gained without cat????, Tino, Sun, 25 Mar 2001 17:10:07
  • Re: What HP is gained without cat????, Justin VanAbrahams , Sun, 25 Mar 2001 18:33:22
    • Gutted cat - pulse rates., Tino, Sun, 25 Mar 2001 19:47:09
      • Re: Gutted cat - pulse rates., Ed, Mon, 26 Mar 2001 00:54:42
      • Agreed..., Craig, Sun, 25 Mar 2001 20:33:20
        • Re: Agreed..., Justin VanAbrahams , Mon, 26 Mar 2001 06:56:19 <-- Viewing This Message
  • Re: What HP is gained without cat????, Craig, Sun, 25 Mar 2001 18:32:38
    • Free flowing type system that still gets cold air, Tino, Sun, 25 Mar 2001 20:00:18
      • Re: Free flowing type system that still gets cold air, Cutic, Sun, 25 Mar 2001 23:07:38

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: (none)
• Next by Date: If you like Radiohead, you should try Kent, AdamB, Mon, 26 Mar 2001 07:53:57
• Main Performance 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)