DV+ option for Mercedes models! The T9388 is the latest addition to the DV+ range of diverter valves from GFB (Go Fast Bits). It is designed as a complete drop-in replacement for the OEM diverter valve in late-model Mercedes vehicles.
Unlike the earlier generation diverter valves manufactured by Pierburg, the newer AMG-branded OEM valves cannot be disassembled and incorporated into a DV+. Therefore, GFB developed the T9388 with a low-profile integrated solenoid as a complete replacement for both the AMG and Pierburg diverter valves, enabling a hassle-free installation with no clearance issues.
Like all valves in the DV+ range, the new T9388 delivers the following benefits over the OEM diverter valve:
Improved boost holding Sharper throttle response Faster boost recovery after a gearshift or brief throttle lift Unrivalled longevity, backed by our Lifetime Warranty 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 has 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 C63S, 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 intercooler tanks rather than directly on the turbocharger. A plastic valve mechanism closing onto a plastic seat resulted in the largest OEM diverter valve leak we’ve seen yet at 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 T9388 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.
Unrivalled longevity, backed by our Lifetime Warranty
The combination of precision manufacturing, attention to detail, and robust materials mean the DV+ will last a lifetime. So does the warranty!
About this range When you just want performance Vehicle Manufacturers Are Pushing Their Engines To The Limit. Get A DV To Match. GFB’s DV+ diverter valve range offers a direct-fit performance solution for the weak factory diverter valves used on many modern vehicles. PCT Patents Pending
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 Make sure you purchase ONLY from our approved dealers to be sure you are getting a genuine product. We are aware of counterfeits on Ebay and Amazon and getting these removed but they do not notify any purchasers of counterfeit product After purchasing.
Go Fast Bits - http://www.gofastbits.nl Go Fast Bits started back in 1997 designing, testing and developing GO FAST BITS. Today a wide range of innovative and high-quality blow-off valves, boost controllers, pulley kits and short shifters are available. All meticulously designed and manufactured from the highest grade materials. GO FAST BITS products are manufactured in Australia and GFB is constantly developing new and innovative products!
Showoff Imports is the official distributor for GFB parts for the Netherlands and Belgium. Currently we stock all popular products, so no waiting times! Dealers inquiries welcomed.
What makes GFB blowoff valves different and better?
Our new TMS Turbo Management System don't throw your BOOST away but INCREASES IT BY up to 40%. GFB's Turbo Management System (TMS) parts offer multiple performance benefits over factory diverter valves. We looked at the concept named ‘blowoff valve’ and took this to a whole new level! Basically the main benefits are:
MORE POWER - BETTER RESPONSE - BETTER DRIVE ABILITY - GET THE SOUND OR NOT.
How to choose a BOV
With the vast range of GFB blow-off valves, questions rise 'Which blow-off valve is the best?' and 'Which blow-off valve should I use?'
The first question is easy to answer: There isn't actually a 'best' in terms of quality. All GFB blow-off valves use the same high-quality internal components. So, provided the right BOV is fitted for your particular vehicle, they all offer the same performance benefits of improved throttle response and reduced lag. The real question is: How do you select the valve for you?
The first step to decide on 'your' BOV, is whether or not you want to hear it, and if so, how much? The following chart lists the “noise ratings” of our blow-off valve range. The final decision will then be based on how much control you want over the blow-off volume level.
Boost Controllers
GFB boost controllers use a more consistent needle-valve bleed system, which brings boost on just as fast as any ball-and-spring system, and generally more quickly than a factory boost control system. On the productpages you can find a comparison of the GFB controller to other major brands, guess who wins this standoff? GFB!
A GFB boost controller will give you the added benefit of not only being able to adjust the peak boost level, but in most cases will bring the boost on earlier, resulting in more power throughout the rev range.
Pulley Kits
The reduction in rotating inertia (we've removed about 2kg by using 6061 T6 aluminum billet) means that the engine can accelerate much quicker during the times it is making very little power before the turbo spools up. The result is better drive ability off-boost and better acceleration, which is especially useful for those with large turbos that only make power in the upper rev range. The smaller size of the crank pulley under-drives the power robbing accessories so that the upper end of the rev range is less burdened, while still allowing them to operate properly.
Short Shift Kits
The GFB Short Shifter is the same height as the factory shifter, it is the actual distance that the gear stick moves between gears that reduced.
Very simple to install. All of the installation is done from inside the car, without having to jack it up and crawl around underneath. Only a few basic hand tools are required, and the necessary hex keys are supplied.
The maximum throw reduction varies for different models. Early WRXs had a particularly long throw, so the maximum reduction with the GFB kit is around 50%, whilst on later models it is closer to 40%. In either case, it is possible to reduce the distance per gate to about 30mm. Whilst it can go shorter, the shifting force becomes too great for comfort, and some of the shift feel is lost.
Download the GFB 2011 Catalog here:
Link to Youtube video about GFB in general:
Link to Youtube video showing a demo of the TMS Blowoff Valves on a GTR:
Youtube video about the benefits of TMS valves vs normal blowoff valves:
Accessoiries
