GFB DV+ T9380 Diverter valve for VW and Audi applications

Product specification:

• Improved boost holding
• Sharper throttle response
• Faster boost recovery after a gearshift or brief throttle lift
• Unrivalled longevity

Improved Boost Holding

Since electronic OEM diverter valves first appeared in the mid-2000s, there have been many revisions over the years in an attempt to address reliability issues. Whilst the latest generation of OEM diverter valves have become more reliable, there is always a performance trade-off due to their operational method and plastic construction.

When GFB engineers performed boost leak testing on the OEM diverter valve in a VW Mk8 Golf R, they found the leak was significantly larger than in earlier generations.

This excessive leaking is due to the emerging trend of manufacturers mounting diverter valves remotely on plastic piping rather than directly on the turbocharger. A plastic valve mechanism closing onto a plastic seat resulted in a large OEM diverter valve leak - 28L/min at 1 Bar of boost.

Even with the Viton face seal (featured on all DV+ pistons), the plastic OEM seat face was found to be so uneven that it was impossible to achieve a reliable seal. The T9380 successfully addresses this issue by incorporating an integral piston seat machined into its body. This design ensures a proper seal, even on uneven plastic OEM seats.

Sharper throttle response, faster boost recovery after brief throttle lift

Factory electronic diverter valves are binary in operation – they’re either open or shut. Your throttle, however, isn’t. When you make small throttle adjustments, the binary operation of the factory diverter results in abrupt changes in power delivery, which is the very definition of poor throttle response.

The DV+ patented “pilot actuation” system allows the piston to open and close progressively, thereby smoothing the power delivery during throttle modulation, and ultimately improving throttle response.

By retaining the factory ECU control and recirculating the vented air, the DV+ is a purely performance-oriented product that offers the following benefits:

• Sharper throttle response
• Faster boost recovery on gearshift
• Solves boost leaking issues
• Built to last

Application:

AUDI S4 B9 (2016-On) 3.0TFSI
AUDI S5 B9 3.0TFSI (2017-On)
AUDI A6 3.0TFSI MHEV C8 (2019-On)
AUDI S6 2.9TFSI (2020-On) (Two Valves Required)
AUDI A7 3.0TFSI (2017-On)
AUDI S7 2.9TFSI (2020-On) (Two Valves Required)
AUDI A8 3.0TFSI (2017-On)
AUDI SQ5 3.0TFSI (2017-On)
AUDI Q7 3.0TFSI (2021-On)
AUDI Q8 3.0TFSI (2018-On)
AUDI RS4 B9 2.9TFSI (2017-On) (Two Valves Needed)
AUDI RS5 B9 2.9TFSI (2018-On)
SKODA Octavia Mk4 2.0TSI (EA888 EVO4) 2020-On
VW Arteon 2.0 TSI EA888 EVO4 2021-On
VW Golf GTI Mk8 (EA888 EVO4)
VW Golf R Mk8 2.0TSI EA888 EVO4
VW T-Roc R (2019-On)