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Boost levels @ redline ??

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  • #16
    opening the waste gate allows the boost to "creep" up to 14
    ABD Turbo Inlet | Autothority CAI | APR DP | GReddy CB | Forge 007 DV | Neuspeed Sports | Axis Supermesh 18" | ABD Badgeless Grill | Bora and Turbo Badges | Powered by Volkswagen Pads | Disabled DRLs | Duel breaklight conversion

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    • #17
      First of all, it was my understanding that CLOSING the wastegate holds boost, OPENING it lets all of the boost go bye-bye. The wastegate allows the bypass of the exhaust gasses around the turbo.

      Secondly, how are you keeping the wastegate closed? Because this is trickier than people think.

      Thirdly, lots of people use MBCs and set them much higher than 14psi. If you use only a MBC then your wastegate is guaranteed to be 100% closed below your set MBC pressure. But as far as I know these people are not getting 14psi at 6500 rpms. 14psi is what you should get out of a 1 bar chip - but only up to about 5000 or maybe 5500 rpms then it will be dropping off. It is not dropping because of your wastegate control - rather it is dropping because your turbo cannot flow enough air per second when the engine is pumping that fast.

      This is just my own understanding. However, I could be wrong. I have personlly had a bleed valve on my car for a couple of days, bleeding enough to put me into limp mode twice. So my wastegate was staying closed a long time. And I still could not get 14psi at 6500 rpms. Admittedly I could do a better job of managing it (and I intend to).
      Last edited by Kor; 10-21-2003, 08:47 PM.
      KR
      Porsche 991 Carrera S

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      • #18
        OK then its closed. however you want to put it. I loosened the nut on the controll and adjusted to give me higher boost (temporaly untill i get chipped)
        ABD Turbo Inlet | Autothority CAI | APR DP | GReddy CB | Forge 007 DV | Neuspeed Sports | Axis Supermesh 18" | ABD Badgeless Grill | Bora and Turbo Badges | Powered by Volkswagen Pads | Disabled DRLs | Duel breaklight conversion

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        • #19
          so you putting down 14psi without any fuel enrichment to compensate?
          Simon

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          • #20
            I think that the ECU will adjust the fuel to match even without being chipped...
            KR
            Porsche 991 Carrera S

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            • #21
              20-22 PSI

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              • #22
                Whats stock 2002+ boost level at redline?
                2008 BMW 135i | M Package | JB3 | DCI | BMW Performance Exhaust

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                • #23
                  i get 12 spike in 3rd gear settles to 10.. 5th spikes to 13-14 and settles to like 10-11 fun fun

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                  • #24
                    Sean you don't count I am sure you can get whatever pressure you want from that giant turbo.
                    KR
                    Porsche 991 Carrera S

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