[Subscribe to Daily Digest] |
 | [Main Performance Bulletin Board | BBFAQ |
Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: APC tweaking-here's what I did Posted by JeffR [Email]  (#2860) [Profile/Gallery]
(more from JeffR) on Tue, 4 Jul 2006 10:48:22
In Reply to: APC tweaking, dannyboy, Sun, 2 Jul 2006 23:25:06 Members do not see ads below this line. - Help Keep This Site Online - Signup |
This is from a post i had on the C900 board awhile back......
I think it tells you how on http://www.saabworks.com Click on "Projects" then APC Modification. ( I did it to my 92 Vert with decent results). Here's a little of what they say:
DO NOT touch the "K" potentiometer, only the "F" and "P" potentiometers.
In layman's terms the "P" potentiometer controls Peak boost [IE. The initial spike of boost] and the "F" potentiometer controls Full boost [IE. The level Peak boost is backed down to]. It is more accurate to say that the "F" potentiometer controls the increment and/or Frequency that boost is stepped back up after detecting knock. The end result is that "F" controls the level of stepped back boost, after the initial surge of Peak boost. the best results are achieved by tuning both the "F" and "P" potentiometers CLOCKWISE. I used about a ¼ turn on the "P" potentiometer and 1/8 turn on the "F" potentiometer for starters. You will be putting the APC in the car, driving around, and fine tuning for a few days. If you are getting too big an initial spike and not maintaining boost then turn the "P" pot. down and try raising the "F". You want good initial build without too much backing off. Make sure you find a level you are comfortable with. If you tune the "P" pot too high you will overshoot on initial boost, bleed off a whole bunch and possible hit the fuel cutoff.
Jeff R in PDX
, Tue, 4 Jul 2006 10:48:22 <-- Viewing This Message
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.
 |
 |
 |
 |
 |
