Description
The VTA Is A Performance Blow Off Valve Solution For Ford Focus ST and Borg Warner Turbos.
If you want sound with your performance (or performance with your sound!), GFB’s VTA delivers just that! By combining the proven performance benefits of our ground-breaking DV+ with atmosphere venting, the VTA delivers an aggressive blow-off sound, improved throttle response and boost recovery, as well as superior boost holding and reliability in extreme conditions.
The factory diverter valve commonly found on these turbos has two distinct issues, reliability and performance. Oh yeah, it also doesn’t make any noise. Here’s how the VTA addresses these problems.
Reliability?
There are two ways in which the factory diverter valve can fail; the un-reinforced rubber diaphragm can rupture, and the metal valve stem that slides in the plastic cap can stick. In both cases, there is a risk to the turbocharger, as the ECU will attempt to compensate for a boost leak by increasing the wastegate duty cycle, which increases the turbo RPM significantly.
The VTA features CNC machined billet components that last a lifetime and cannot be damaged by high boost pressures or the associated increased charge temperatures.
Performance?
The factory diverter valve typically operates in only two states, either fully open or fully closed. When it opens at low boost, or during a partial throttle lift mid-corner, it causes increased lag and a noticeably non-linear boost transition, which is noticeable as a distinct step down in power as you roll off the throttle and the valve opens.
The VTA however allows the piston to open and close progressively in response to the amount of boost pressure present, so it only vents enough air to prevent compressor surge (the primary purpose of a diverter or blow off valve). This helps to smooth out boost transitions, making the throttle response more linear and predictable, and also minimizes lag introduced by the factory diverter valve.
Key features:
- TMS Technology for faster boost recovery on gearshift and during throttle modulation
- Improved boost holding ability
- Atmosphere venting for blow-off sound
- Simple, direct bolt-on kits include everything you need to install
- Manufactured in Australia in accordance with ISO 9001
VTA or DV+?
Depends if you want sound or not. Both valves are constructed with the same quality materials and valve mechanism, and both offer the same performance and reliability benefits. However, the VTA vents to atmosphere for sound whilst the DV+ recirculates the air to keep it quiet.
Why choose a VTA over a BOV spacer?
BOV spacers are cheap and they make sound. But that’s it. All the inherent performance and reliability issues you get with the factory diverter valve remain, because a spacer doesn’t change the factory diverter components or operation method in any way. The VTA improves the operation of the factory diverter valve for sound AND performance.
WORLDWIDE PCT PATENTS PENDING
PROTECTED BY CHINA UTILITY MODEL PATENTS; CN206054094U & 206129406
VTA Performance Blow Off Valve Range
The VTA is a high-performance blow-off valve solution for modern turbo vehicles fitted with an electronic factory diverter valve, offering better performance, reliability, and a great blow-off sound!
Release the Sounds!
We could tell you about the performance, reliability, and boost holding benefits of the VTA range, but let’s face it – you’re here for the sound, right?
By blasting the vented air out to atmosphere, the valves in the VTA family give your ride that signature blow-off sound when you lift off the throttle.
Uncompromised throttle response
Modern OEM electronic diverter valves might be faster than pneumatic types, but they are binary in operation – open or shut. What they gain in operational speed, they lose in throttle response. The VTA adapts the method of operation of the factory diverter system to give you the best of both worlds.
Pilot Operation – the patented design of the VTA means the piston is not directly connected to the solenoid, so it can open and shut progressively. This operation method leads to improved throttle response and drivability, because the VTA is more “discerning” about how much air it vents when triggered by the ECU – it only vents the amount of air necessary to eliminate pressure spikes that cause compressor surge, where the factory diverter opens fully whether it needs to or not.
When you close the throttle during spirited driving, the VTA opens to prevent compressor surge and protect the turbo. When the pressure has dropped sufficiently, the piston begins closing to preserve a small amount of boost in the intercooler for as long as possible. This helps the turbo return to peak boost faster when you re-open the throttle. We call this the
Turbo Management System (TMS) benefit.
Lightning-fast operation – vehicle manufacturers use an electronic diverter valve because they respond faster than pneumatic valves. Well, the VTA is faster again! No other valve on the market comes close to matching the VTA opening and closing speeds.
Hold my boost and watch this…
Your turbo works hard to create boost, so why make it work harder than it needs to? A GFB VTA ensures that all your hard-earned boost makes it to the engine.
Unsurprisingly, the moulded plastic valve components in the factory electronic diverter valve don’t seal that well. A boost leak from the factory diverter valve will cause the ECU to drive the turbo harder to compensate for the loss, resulting in higher turbo RPM, more exhaust backpressure, and hotter compressor outlet temperatures. So even though your tune might still hit target boost, a diverter leak means the turbo is more stressed, and the engine makes less power.
The VTA replaces the factory diverter’s loose-fitting plastic valve with precision CNC machined metal components and a durable elastomer piston seal. Because the VTA design uses boost pressure to force the piston shut, it doesn’t matter how much boost you throw at it – a VTA won’t fail, leak, or blow open.
