The valve is probably staying open with your high boost levels.
Stratmosphere sells, predominantly, to the Audi crowd. I don't
think they're running the boost we're capable of in our Saabs.
Unless you told them you were putting this into a modified Saab,
they probably sent you the spring that's used in most Audis.
Get the 'blue' spring - I think it's the one you want. That valve
is very well made and will outlast any diaphragm valve if you're
running over 20 psi, which you probably are with a stage 3.
Piston bypass valves, if properly installed, will not destroy your
intercooler. They cannot make any more boost than what is
programmed by the ECU. An intercooler that fails, usually does
so because of the amount of boost. If you're running a stock
intercooler and getting over 20 psi of boost, then it is only a
matter of time before your intercooler is toast. The plastic end
tanks aren't designed for those kind of pressures over a prolonged
period of time. There's no adaptation needed when one fits a
new by-pass valve.

posted by 12.91.26...

• Could Hyperboost cause turbo lag?, Joe98, Tue, 10 Sep 2002 15:12:40
  • My 2 cents..., Pat98, Thu, 12 Sep 2002 00:49:47
  • You need the heavier spring.........., zeke, Tue, 10 Sep 2002 20:44:23 <-- Viewing This Message
    • Zeke, what boost levels do u think I'm pushing?, Joe98, Tue, 10 Sep 2002 23:56:27
      • Well, my TAQ used to occasionally boost...., zeke, Wed, 11 Sep 2002 07:00:37
        • Is all of this true with an auto as well?..., Joe98, Wed, 11 Sep 2002 11:34:20
          • I certainly get a "whoosh" with my auto, but >, Bill Davies, Thu, 12 Sep 2002 11:38:18
  • Re: Could Hyperboost cause turbo lag?, Bill Davies, Tue, 10 Sep 2002 16:52:53
    • Thanks, Bill..., Joe98, Tue, 10 Sep 2002 17:01:14
      • I have used a Viggen valve on my '95...., jj, Tue, 10 Sep 2002 17:15:06
      • Viggen valve now standard issue at your friendly >, Bill Davies, Tue, 10 Sep 2002 17:05:47
        • Which part number is that?, BillJ, Wed, 11 Sep 2002 05:45:20
          • Viggen BPV: Bosch # ends in 110..., Joe98, Wed, 11 Sep 2002 11:31:41
            • Think I'll get a 110..., BillJ, Wed, 11 Sep 2002 19:43:23
              • Sorry, can't look at the car to get the number as >, Bill Davies, Thu, 12 Sep 2002 09:19:56
                • Meant to say "fixed" but mixed is good too... (n/m), Bill Davies, Thu, 12 Sep 2002 09:20:44

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