SKU: SKU: GFB-T9354
The T9354 is a fully recirculating direct factory replacement forthe pneumatic diaphragm type BPV (Bypass Valve) used onFord, Volvo, Porsche, & Borg Warner Turbos - when you wantthe performance WITHOUT the noise!
Using GFBs TMS technology the T9354 can help return theengine to peak boost up to 30% faster than a factory divertervalve when shifting gears
The factory BPV (bypass valve) has a couple of keyshortcomings, in construction and operation.
First of all,tuned engines running high boost also produce a lot ofheat in the charge air. Because the BPV is situated righton the compressor, it is subjected to the hottest part ofthe intake charge, and the heat from the compressorcover itself. This can cause the factory diaphragm torupture, and if that happens and goes undetected fora while, it can cause damage to the turbo, as the ECUwill try to compensate for the lost boost pressure byincreasing turbo speed.
Second, the operation of the factory BPV is not aimed at throttleresponse. Because of the soft spring and the solenoid valve that isin-line with the vacuum hose, it can only operate in two states fully open, or fully shut.
The factory BPV does not have the abilityto open and close progressively in response to the existing boostpressure, and throttle response suffers when the valve vents morethan it should in situations where you are not fully lifting the throttle.The T9354 solves these issues using proven metal and siliconeconstruction of the valve components, meaning the DV+ will last alifetime regardless of the harsh conditions.
As for performance, because the DV+ features a carefullyselected spring rate AND spring pre-load adjustment, it can operateprogressively to help sharpen throttle response. This is the basisof GFBs TMS principle, which has been shown to reduce the timeto peak boost on gearshift by 30%. This benefit is also particularlynoticeable in situations where you are modulating the throttle tobalance the car in a corner.