thus making it connected to atmosphere only. Surely it won't be infinity but 30-40 bars after what compressor wheel is completely damaged, turbo housing and lines broken. Oh, I think the 1st one will be the intercooler. My $50 vs it'll blow up at 5-6 bars.

You're quite right when talking in terms of math. But you're wrong when we get back to even physics or moreover the real life. What's the infinity? It's a math object that doesn't exist in real time.

Well, let's give up this theology and get back to that very equation. Actually I'm building up my own ignition ecu (since having stock LUCAS EFI instead of Bosch, I'm in EU; Lucas has no 'engine load' output which is required to DI ECU). So I'm drilling saab's specs and manuals on direct ignition and APC. Chp 2.4 (it's about 9K DI) says that:
- APC valve has PWM input (12 Hz for C900 and early 9k and 90 Hz for later 9Ks)
- you won't be able to achieve full output if having too low basic boost
- if having too high basic boost we'll face with 'swinging' output

I just wondered why and... fall asleep at 5-6 AM on both Sat and Sun :)
Finally I got this equation which I find to be obvious (check description in the root post) but would like to discuss with others. Local saab board... We used to have Mon as a Complaints Day, Tue-Wed-Thu are about economics-politics-sport-BMW-Volvo-Porsche-Jaguar-moderator-iPhone-travelling and so on. Fri is for titties (good tradition, btw :)). And there's noone in that BB on weekends.

So I'm sorry guys but I decided to discuss it with you :)

Zig

posted by 195.146.67...

• APC theory question. Duty cycle and pressure (+), Siegfried, Mon, 24 Sep 2007 07:09:57
  • Re: APC theory question. Duty cycle and pressure (+), Saab Junkie, Mon, 24 Sep 2007 11:26:00
    • pull out a line running to westgate (+++), Siegfried, Mon, 24 Sep 2007 12:39:19 <-- Viewing This Message
      • I mean it's infinity in a case of 'ideal' system (+), Siegfried, Mon, 24 Sep 2007 15:41:42
  • yeah i got a thought, vvack0matic , Mon, 24 Sep 2007 09:23:03
    • Re: yeah i got a thought, Vern, Mon, 24 Sep 2007 11:11:24
    • Geez, Zig, England produced Isaac Newton., RayF, Mon, 24 Sep 2007 10:48:22
      • Glad to see you smiling, Ray :), Siegfried, Mon, 24 Sep 2007 12:46:05
        • The great, I have to deny, I know better., RayF, Mon, 24 Sep 2007 14:18:37
          • Try 'ctrl+P' and get a paper media (+), Siegfried, Mon, 24 Sep 2007 15:28:42
          • See, you can't even see a typo right in front of you., RayF, Mon, 24 Sep 2007 14:32:06
    • Too cool for Mon? :) (-), Siegfried, Mon, 24 Sep 2007 09:47:51

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