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Here's the scenario: I recently installed a BSR Stage 3 ECU, complete JT 3" exhaust, K&N air filter, and new NGK plugs, gapped to 0.90".

I also installed a Hyperboost diverter valve (Stratmosphere) in place of the stock BPV on Saturday. To my amazement, the BPV was actually okay (I thought it would have been ripped internally). I applied suction to the nipple-end of it, and there was plenty of resistance available. I even stuck my finger up into the bottom of it to feel if the valve was going up and down, and it most certainly was.

Here's what's happening now: as I would drive the car enthusiastically (trying to get an adaptation run accomplished since installing the re-mapped ECU), my boost guage would be pinned beyond the red (this was with the stock BPV), and I would have slight turbo-lag (which is surprising since I was told by BSR it would be non-existent with the new ECU, and since I have an auto there isn't much to begin with anyway). When I drove with the Hyperboost, my boost guage now stays within the slashed yellow-red area (where it used to be with the stock ECU and BPV), and I have a lot of turbo lag now. The car actually felt faster/stronger with the stock BPV.

Can anyone explain what is happening? Is the Hyperboost not good for my application now? If so, what should I use since I assume my stock BPV will be blown to bits soon with the extra boost the new ECU is putting out. Is a Viggen-type of BPV a better route for me?

Also, do I need to reset the new ECU now that I installed the Hyperboost? Might the adaptation run have been completed while the old BPV was in the car (I used it for about 1 week, daily commute to work, 30 miles total per day), and it now needs to be re-adapted with the Hyperboost?

TIA
Joe
'98 CSE auto 56K

posted by 12.111.48...

• Could Hyperboost cause turbo lag?, Joe98, Tue, 10 Sep 2002 15:12:40 <-- Viewing This Message
  • My 2 cents..., Pat98, Thu, 12 Sep 2002 00:49:47
  • You need the heavier spring.........., zeke, Tue, 10 Sep 2002 20:44:23
    • 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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