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[Main Performance Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Nope nope nope... Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Justin VanAbrahams [Email] (#32) [Profile/Gallery] (more from Justin VanAbrahams) on Tue, 15 Jan 2002 04:53:20 In Reply to: dont know but was told, jak [Profile/Gallery] , Mon, 14 Jan 2002 21:42:16 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

Open up your APC box and try and find a single bit o' memory... just isn't there. It's all a bunch of analog circuitry that "listens" and responds to the pressure transducer, the RPM signal, and the knock sensor. That's all it does.

The reason it can take several minutes to get back to full boost is because knock unfortunately doesn't just go away. Heat in the engine causes knock, and once knock sets in things get even hotter even more quickly. Cooling down parts after any amount of knock will take some time, and during that time the engine will be prone to it. As a result, the APC will seemingly keep boost back because it keeps detecting more knock...

As for LH boxes, they are as stupid as modern electronic fuel injection gets. They listen to an RPM signal, an airflow/mass signal, and a throttle position sensor and run it up a chart to figure out how much fuel to dump. They don't know any more than that, and don't keep track of what happened once its gone - they simply don't have the logic or the onboard storage to do so. The only memory in LH, and only in LH 2.4 and later, is the ability to store fault codes once they've occured, and it can only store *3* codes - which equates to 15 characters worth of information. That's it. Couldn't store a lot of driving style info in 15 characters, I'm afraid... well, maybe mine: "Lead Foot" heh.

-Justin

P.S. I know "lead foot" would take a lot more than 15 binary characters! :)



posted by 66.123.95...

• APC Memory, Alex, Mon, 14 Jan 2002 17:47:08
  • Re: APC Memory, BobJ, Tue, 15 Jan 2002 19:46:54
  • Why do you ever put anything but preimum in your car???, RedSPG18, Tue, 15 Jan 2002 16:35:09
  • Re: APC Memory, Justin VanAbrahams , Mon, 14 Jan 2002 20:29:06
    • What year C900 do you have? Because....., WASSAAB, Mon, 14 Jan 2002 20:58:34
      • Re: What year C900 do you have? Because....., Johann F, Tue, 15 Jan 2002 04:57:18
        • Lucas CU14 is a different story..., Jouko Kuisma, Tue, 15 Jan 2002 07:37:16
          • Re: Lucas CU14 is a different story..., Johann F, Tue, 15 Jan 2002 11:11:30
            • Re: Lucas CU14 is a different story..., Jouko Kuisma, Wed, 16 Jan 2002 10:48:59
        • Cars an '89, Alex, Tue, 15 Jan 2002 05:29:51
          • Ok then, WASSAAB, Tue, 15 Jan 2002 08:59:53
      • Re: What year C900 do you have? Because....., Justin VanAbrahams , Mon, 14 Jan 2002 21:14:44
        • dont know but was told, jak , Mon, 14 Jan 2002 21:42:16
          • Nope nope nope..., Justin VanAbrahams , Tue, 15 Jan 2002 04:53:20 <-- Viewing This Message
            • One modification...., Justin VanAbrahams , Tue, 15 Jan 2002 06:24:42

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