GFB DV+ T9355 diverter valve VAG 1.4 TSI (GFBDVT9355)

Many vehicle manufacturers use an electrically controlled original valve, which all too often is defective or leaking straight from the factory. This causes a loss of power, which is even more pronounced on tuned vehicles because of the higher boost pressure. This is where GFB extends the DV+ range with a plug ’n play solution: the robust, anodised and CNC-machined aluminium housing of the GFB DV+ diverter valve closes this “hole” in the charge-air system, and the vehicle has noticeably more power and torque. GFB has demonstrably tested its effectiveness in several power measurements on the dyno! Since the GFB DV+ only replaces the original valve and the original control unit (the solenoid valve unit) is retained, it integrates perfectly. GFB’s DV+, on the other hand, responds much better, is cheaper, easier to fit and causes no “surging” or flutter. In addition, it needs neither different springs to adapt it to the respective boost pressure nor regular maintenance. It also withstands any boost pressure. The secret is that the piston seals by means of the applied boost pressure itself and not with the help of the spring. Through small openings in the piston guide housing, the pressure flows back into the valve unit and pushes the piston down by the boost pressure’s own force, pressing the piston with its rubberised underside against the stop and thus sealing the system under load. The so-called “pilot” (labelled “solenoid plunger” in the illustration below) now seals the piston’s “pressure chamber” airtight, so that inside the piston chamber pressure acts on a larger area than from below on the rubberised underside. As soon as a load change occurs (e.g. when shifting gears), the control unit lifts the pilot and the pressure can escape from the piston chamber, which causes the piston to rise and vent the excess pressure from the charge-air system. Advantages: - 100% sealed even at high boost pressures (flawless up to 2.5 bar) - noticeably more power and torque - made of aluminium (housing) and brass (piston): more reliability and durability on tuned vehicles - Faster boost build-up compared with an original diverter valve - Plug & play: easy installation within 10-15 minutes, as the original control unit is retained

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