the extra circuit board work does 2 things- first it eliminates the boost taper at high RPM- and secondly it modifies how the knock detection backs off boost: boost is stepped back in smaller increments and allowed to return a lot sooner. run 94 or higher octane with this one. How safe is it? I did this mod at 150,000 miles on my 88 900t, and ran max boost 25 PSI for 100,000 miles before the rings started to get tired. As for removing the boost taper: you cannot imagine what a 25 PSI shot from the turbo is like at 5500 rpm's on the highway is like! with this mod I could outrun 911's on the highway!

but of course- proceed at your own risk, do some research, do the mod you are comfortable with, and i recommend a partial engine rebuilt BEFORE you modify your apc at all. Do a headgasket and all the oil seals. Your engine will thank you.

now to get back to building the rally car... :)

Saabworks

• APC Modification--very confused., Tino, Wed, 28 Mar 2001 11:10:19
  • what does all the resistor manipulation do???...>>>, chrystobal, Wed, 28 Mar 2001 11:21:29
    • Re: what does all the resistor manipulation do???...>>>, james fox, Wed, 28 Mar 2001 20:29:28 <-- Viewing This Message
      • yeah, see i boosted up because i knew..>>, chrystobal, Thu, 29 Mar 2001 18:10:39
      • I would like to know what resisters to change in erly apc, jak , Wed, 28 Mar 2001 21:01:38
    • can you elaborate.., Ed S, Wed, 28 Mar 2001 11:40:18
      • ya, shoor.....here's the URL: ...>>, chrystobal, Wed, 28 Mar 2001 13:47:57
        • otay, that didn't work. try this: ....>, chrystobal, Wed, 28 Mar 2001 12:50:57
          • yup, that's what I remember, printed out long time ago, n/m, Ed S, Wed, 28 Mar 2001 13:38:24
  • http://www.saabworks.com/straights/apc.html, Tino, Wed, 28 Mar 2001 11:17:08
    • Check out C25, C26 and connections of pin17, pin16... (n/m), JC, Thu, 29 Mar 2001 01:31:58

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: for those of you running 16" aeros/super areo's, james fox, Wed, 28 Mar 2001 20:22:43
• Next by Date: I would like to know what resisters to change in erly apc, jak, Wed, 28 Mar 2001 21:01:38
• 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)