GFB expands the DV+ range with a direct-fit direct-fit diverter solution specifically designed for the VW Mk7 Golf R and Audi 8V S3. This valve replaces the factory valve which utilizes a plastic piston design which leaks boost and can't hold boost levels above factory levels.
Even though the Mk7 R and 8V S3 have the same Revision C factory diverter as previous models, there is a distinct lack of space behind the diverter, meaning the normal T9351 DV+ won’t fit. The T9359 solves this by re-orienting the solenoid coil to gain clearance, whilst keeping a very stock appearance.
Why fit a DV+?
The solenoid coil itself from the factory-fitted valve is great (the ECU opens it faster than any pneumatic valve so why replace it?), but the problem is the plastic piston valve mechanism. So GFB’s DV+ solves this problem by replacing just the valve parts with an anodized billet aluminium housing fitted with a brass piston machined to exacting tolerances.
The end result is sharper throttle response, lightning-fast valve actuation, and it will hold as much boost as you can throw at it. GFB’s DV+ solution on the other hand is more responsive, less expensive, easier to install, and doesn’t cause compressor surge/turbo flutter. Oh, and it doesn’t require different springs or frequent re-builds.
Common OE Problem
The plastic piston-type leaks far more than most people realise (by design, not from wear), and doesn’t always close after a high-boost gear shift. Additionally, because the factory diverter has a long stroke and weak return spring, its ability to open and close reliably at high boost or in the presence of friction caused by oil gunk is compromised.
The DV+ addresses the factory valve problems with a very simple and elegant solution. Keeping the factory solenoid retains all the benefits of the stock system, and replacing the valve parts with indestructible metal components ensures strength and reliability no matter how much boost you run.
That's not all. Rather than using the solenoid to directly actuate the valve, GFB has introduced a unique “pilot-actuation” system. This means the solenoid controls the air pressure that is used to open and close the piston, so it doesn't matter how much boost you push through it, the DV+ will open and close reliably without ever exceeding the solenoid’s capability.
This feature also improves on the factory system by opening the valve progressively in response to boost pressure, so it only opens as much as required to get the job done (the factory valve simply opens and shuts, it cannot partially open if boost pressure is low), resulting in better throttle response.
2015+ Volkswagen Mk7 Golf R