Re: knock sensor retro fit idea - Saab Saab Model 99 Bulletin Board - Saabnet.com
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Re: knock sensor retro fit idea
Posted by Geoph (more from Geoph) on Wed, 18 Aug 2004 10:14:03
In Reply to: knock sensor retro fit idea, David Young, Wed, 18 Aug 2004 09:38:08
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To hell with the lower CR pistons (since you already have the engine installed and the car runs). You need to install an APC system out of a C900 and you should be fine so long as you run good gas. The APC will sense knock and retard your boost immediately so running the higher CR pistons shouldn't be too much of a problem. You don't want to install a knock sensor with just a light to rely on. Once you saw the light flashing and reacted, the damage would already be done. The damage that knock causes is usually at a higher frequency than you can hear, so if you try to rely on listening to knock, the damage has already been done too.
All you need is the APC box, knock sensor, and wiring harness from a C900 (make sure you get the entire shielded harness between the knock sensor and APC box - don't cut it - the rest of the harness is just regular wires and can be cut) and associated pressure sensors. Follow the wiring instructions in a C900 Bently manual and you're good to go. I installed one on a friend's '86 (notchback converted to a turbo) in a few hours.
posted by 65.216.75...
Posts in this Thread:
- knock sensor retro fit idea, David Young, Wed, 18 Aug 2004 09:38:08
- Re: knock sensor retro fit idea, Geoph, Wed, 18 Aug 2004 10:14:03 <-- Viewing This Message
- Richard Cooper just added APC to his 99T...., DougM , Wed, 18 Aug 2004 10:24:58
- APC, Rowan Atalla, Wed, 18 Aug 2004 15:22:11
- Re: APC, David Young, Thu, 19 Aug 2004 13:01:38
- Re: APC, Richard Cooper, Thu, 19 Aug 2004 10:44:08
- Re: APC, John Blas, Mon, 23 Aug 2004 08:33:17
- Re: APC, Richard Cooper, Thu, 19 Aug 2004 10:52:52
- Re: APC, David Young, Thu, 19 Aug 2004 13:11:17
- Re: APC, Richard Cooper, Fri, 20 Aug 2004 07:51:48
- Re: APC, Richard Cooper, Sun, 5 Sep 2004 02:32:45
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