Click Banner for Details on this Saabnet.com Classified

The answer is it will not harm anything. If you are getting surging, then the timing may well not be retarding enough to counteract knocking, however, there are some serious and somewhat worrisome contradictions in your approach.

While not wanting to make your car into a rocket, you are still aiming for 20psi of boost on otherwise stock (right?) internals, with no timing light, and no intention of checking the timing light.

I would not run my car at anywhere near that much pressure without a timing light, or having it checked and set with a borrowed one. It is easy, quick, and makes me feel comfortable driving my car hard.

The difference between no knock and fatal engine damage due to predetonation at those pressure levels can only be a few degrees. You may be tempting fate.

Having the timing too far retarded during boost will make the turbo spool slower, and make off boost driving more sluggish. The retard stop modification is meant to be used in conjunction with a timing light so that you can bend the stop to allow say 10* of timing retard instead of 6* at full boost, so that the static timing can be set more advanced for off-boost and low-boost driving. I run mine at about 22* advance retarding to about 11* by 15-17psi (and 20-21psi with a Group9 Stage 2 APC), which gives a very torquey low- and midrange while providing steady full throttle boost.

Cheap timing lights run under $45, really nice ones that will last you a lifetime working on cars run ~$90.

Best,
Drew

posted by 199.74....

• swedish dynamics apc , 30# injectors and fuel chip., 91 900 AERO Convertible, Mon, 12 Mar 2007 09:39:30
  • Re: swedish dynamics apc , 30# injectors and fuel chip., 900 Aero , Mon, 12 Mar 2007 18:00:50
    • Re: swedish dynamics apc , 30# injectors and fuel chip., 91 900 aero Convertible, Mon, 12 Mar 2007 18:21:25
      • Re: swedish dynamics apc , 30# injectors and fuel chip., 900 Aero , Mon, 12 Mar 2007 20:04:41
        • Re: swedish dynamics apc , 30# injectors and fuel chip., 91 900 AERO CONVERTIBLE, Mon, 12 Mar 2007 20:55:26
          • Re: swedish dynamics apc , 30# injectors and fuel chip., 900 Aero , Mon, 12 Mar 2007 22:22:27
            • Re: swedish dynamics apc , 30# injectors and fuel chip., 91 900 AERO Convertible, Tue, 13 Mar 2007 07:05:22
              • No Harm, DrewP, Tue, 13 Mar 2007 11:06:37 <-- Viewing This Message
                • Re: No Harm, 91 900 AERO CONVERTIBLE, Tue, 13 Mar 2007 18:59:56
        • Re: swedish dynamics apc , 30# injectors and fuel chip., 91 900 AERO CONVERTIBLE, Mon, 12 Mar 2007 20:55:25
          • Re: swedish dynamics apc , 30# injectors and fuel chip., 900 Aero , Tue, 13 Mar 2007 15:25:11
          • Yes, But...., DrewP, Mon, 12 Mar 2007 22:03:04
            • Yes, results are amazing, Notnoel , Tue, 13 Mar 2007 07:16:22
              • Re: Yes, results are amazing, 900 Aero , Tue, 13 Mar 2007 15:22:08
  • I feel your pain!! They don't due much for customer...., Inga , Mon, 12 Mar 2007 11:17:02
    • I had a good experience with SD, Steve 97 9K Aero, Tue, 13 Mar 2007 17:36:35
      • Re: I had a good experience with SD, Bill Davies, Wed, 14 Mar 2007 00:47:45
    • I made a mistake with SD years ago..., Chaz, Mon, 12 Mar 2007 13:31:06
      • I made a mistake with SD years ago..., iIdo not agree, 91 900 AERO Convertible, Mon, 12 Mar 2007 14:03:38
        • Re: I made a mistake with SD years ago..., iIdo not agree, John Williams , Tue, 13 Mar 2007 13:27:13
        • Re: I made a mistake with SD years ago..., iIdo not ag, Justin VanAbrahams , Mon, 12 Mar 2007 15:32:34
        • I believe my comments were in keeping with your post, Chaz, Mon, 12 Mar 2007 15:03:44
          • Re: I believe my comments were in keeping with your post, 91 900 AERO convertible, Mon, 12 Mar 2007 17:49:30

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: Re: you can call me if you need to, Kaylan Marie, Tue, 13 Mar 2007 08:44:07
• Next by Date: No offense meant, don't read too much, SloopJohnB, Tue, 13 Mar 2007 11:22:39
• 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)