All you need to know about APC units is here - Saab 900 Bulletin Board - Saabnet.com
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This site has a great write up on the various APC boxes and how to tune them. Hit the tech tab once you are in the site and then choose topics form the menu on the left. The DIY tab also has some great info. As far as the "red box" goes, these are hard to find and grossly over-priced for what you get. you can get the same results (or better) by following the instructions on that site for building your own - the only difference between the red box and the normal APC box is two resistors. It'll cost you about $5-10 to make your own red box, if you are good with a soldering iron.
900aero.com webpage
Posts in this Thread:
- Red Box/Fuel Pressure Regulator Conversion, 94Vert , Fri, 11 Feb 2022 06:29:25
- All you need to know about APC units is here, Notnoel , Mon, 14 Feb 2022 07:22:02 <-- Viewing This Message
- Pandora’s Box, Saabina , Fri, 11 Feb 2022 17:36:23
- The spring in the wastegate controller gets tired ...., 94Vert , Fri, 11 Feb 2022 13:41:40
- Re: Red Box/Fuel Pressure Regulator Conversion, Tushy, Fri, 11 Feb 2022 12:26:29
- Ive found that this upgrade often makes the clutch slip, AaronG, Fri, 11 Feb 2022 12:09:36
- Re: Red Box/Fuel Pressure Regulator Conversion, Saabina , Fri, 11 Feb 2022 08:36:50
- Re: Red Box/Fuel Pressure Regulator Conversion, Charles, Fri, 11 Feb 2022 06:59:55
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