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The Hyperboost or Forge or ?? boost pressure diverter valves will not increase the performacne of your vehicle. What they will do is handle the increased boost pressure from a modified ECU. And they are easily rebuilt/cleaned so they last basically forever.
The stock Bosch units begin to leak with increased boost and the diaphram gets worn and cracked with age leading to further boost leaks.
As far as biggest band for the buck? In all depends on your priorites, but my list would be in order:
>22mm rear sway bar (either SAS or Genuinesaaab.com)
>steering rack brace and polyurethane bushings (Genuinesaaab.com)
>sport exhaust
>Speedparts ECU (which will include a JR air cleaner element).
Then you will probably need the Hypeboost valve when the stock Bosch unit starts to 'honk' under the new boost load.
Rob Mustard (aka REM in Seattle)
1998 Saab 900SE Turbo, Silver, 5-door, Automatic Transmission
UPGRADES -
ENGINE
·SpeedParts ‘Step 2’ Engine Control Unit (ECU).
·Saab stainless steel sport exhaust with added center resonator.
·Forge piston type boost pressure by-pass/diverter valve.
·3” inlet tube to factory airbox with ITG performance foam air filter.
·Smoothed/ported throttle body transition casting and removed turbocharger outlet tube ‘silencer’.
·Thermo-Tec ‘Thermo Shield’ insulated intercooler inlet and outlet tubes.
SUSPENSION
·205/55-WR16 Dunlop SP Sport 5000 tires.
·Swedish Auto Specialties 22mm (7/8”) rear anti-sway bar.
·Koni Sport adjustable front struts and rear shock absorbers.
·Abbot Racing polyurethane tracking control arm bushings.
·Abbott Racing steering rack brace.
LIGHTING
·European E-code headlights with Philips ‘VisionPlus’ halogen 60/55 watt H4 bulbs.
AUDIO
·Infinity Kappa speakers – Model 32.1cf 3.5” 2-way speakers in the dash, Model 693.1i 6”x9” 3-way speakers in the rear parcel shelf, and Model 65.1mb 6.5” mid-bass speakers in the front doors.
·Dynamat ‘Super’ & Dynamat ‘Premium’ sound deadening material in doors and rear cargo area.
posted by 208.49.241...
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