Blow Off Valves & Diverter Valves

GFB’s DV+ solution couldn’t be simpler - keep what works and replace what doesn’t.

Worldwide Patent and Design Patent Pending

• Retains the factory solenoid coil for seamless integration
• Replaces plastic valve parts with metal for reliability and strength on chipped engines
• Direct-fit replacement with GFB’s TMS benefits
• Exclusive “pilot-actuated” valve mechanism for rapid response at high boost

GFB expands the DV+ range with a direct-fit solution for the weak factory diverter valve used on many European vehicles.

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 weak point however is the valve mechanism itself. So GFB’s DV+ solves this problem by replacing just the valve parts with an anodised 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. Read all about the DV+ story on the next page.

Other manufacturers’ products involve replacing the entire system with a traditional pneumatic valve, requiring long vacuum hose runs, additional parts for tapping into the intake manifold vacuum, plus either a different solenoid valve to actuate the pneumatic valve or a ballast resistor to plug into the OE wiring loom. All these additional items result in a product that is slower, less responsive, more expensive and takes much longer to install.

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.

Many late-model European cars use ECU controlled solenoid-type diverter valves. This is a good concept because the valve can react very quickly and it only opens when it needs to.

However, there are some problems with these valves. There are typically two types of solenoid-actuated diverter valves found standard on VAG and European cars, both of which have their shortcomings.

Common OE Problem #1
The diaphragm types are commonly known to rupture, especially when boost and temperature are increased as a result of chip tuning.

Common OE Problem #2
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, in both cases, the solenoid on the OE diverter is directly connected to the valve mechanism, which is not ideal because neither it nor the return spring are strong enough to open and close the valve reliably at high boost.

With problems like this, you can see why other aftermarket manufacturers assume the best solution is to replace the factory diverter entirely. Unfortunately though, whilst their replacement kits might be stronger than the factory diverter, their slower response speed and lower flow do not justify the extra cost and complexity - more of a compromise than a solution.

GFB has taken a different approach to deliver a complete solution that solves existing problems and improves performance, without compromise or a hefty price tag.

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 indestructable 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, we’ve 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.

Bring out the sound of your turbo with the ECS Atmospheric Diverter Valve Spacer! The ECS DV Spacer gives your N20 the sound of a blow off valve (BOV) with every gear change and every boosted throttle close! The strategically engineered vent slots allow you to boost on without a CEL (Check Engine Light).

FEATURES:

Anodized Black 6061-T6 aluminum

Features 3 radial slots to let out the “woosh” with optimal flow for all OEM DV types

Engineered to operate CEL-FREE!

Alignment holes for ease of installation

Includes pre-installed, captured Viton O-rings, resistant to chemical degradation

Includes Zinc-plated alloy steel socket head cap screws

Tested for performance and durability

INSTALLATION:

Remove Diverter Valve
Place the spacer onto the DV flange r
Re-install your original DV solenoid atop the spacer with the included longer hardware.
The wastegate actuator must be swung out of the way for install. Loosen both screws retaining the wastegate actuator, then remove the one closest to the actuator, allowing the actuator to swing out of the way. This will allow for ease of installation.

Elevate your Mini Turbo Models, including Cooper S and JCW, with the ALTA BOV Spring Upgrade. This replacement spring offers a cost-effective, high-performance solution for your stock Blow Off Valve (BOV). By holding more boost between shifts, it significantly reduces turbo lag, enhancing overall performance. The carefully designed stiffer spring ensures normal BOV operation while maintaining increased pressure in the boost tubes, preventing power gaps.

• Simple and cost-effective upgrade for improved turbo response
• Reduces turbo lag between shifts, boosting overall performance
• Designed with a custom-made heat-treated 17-7 Stainless Steel Spring
• Rated for over 7,000,000 cycles for long-lasting durability
• Holds and vents up to 40psi efficiently

Upgrade your OEM Gen1 B58 BMW charge pipe with our durable aluminum replacement, designed to prevent charge pipe failure.

Crafted from high-quality aluminum with a glossy black powder coat finish, this replacement charge pipe boasts CNC machined flanges, optional 1/8" NPT methanol bungs, and OEM-style mounting hardware for a seamless fit. It also features a vent-to-atmosphere blow-off valve flange for enhanced integration and performance.

The kit includes:

BMS Elite Aluminum Charge Pipe TurboSmart Race-Port BOV (3) 1/8" NPT Bung Plugs with Thread Sealer (1) 3" to 2.5" Silicone Reducer Coupler (2) 1/8" NPT to 1/4" Push-lock Fittings (1) 1/4" Push Tube Line (1) B58 Boost Tap Adapter Associated Hardware (Clamps, O-rings, Screws)

Turbosmart GenV Raceport BOV (Fits competitors 50mm / female style flange. No weld flange included)

The Race Port is renowned for its exceptional compactness and lightweight design tailored for turbocharged competition-level engines. With its innovative collar design and internal flow structures, this BOV stands out as 50% lighter and 25% smaller than competing models, yet it boasts an impressive flow rate of 330 CFM, making it the market's top-performing BOV in its category.

Fits Chargepipes With Tial/Turbosmart Flange

In addition to the weak stock chargepipe, the factory N54 diverter valves can also be a source for boost leaks. The diverter valve takes overboost and re-directs it back through the intake and turbos instead of allowing it to pass into the intake manifold. It's the same as a blow off valve (BOV) but instead of releasing into the engine bay, it stays contained to the engine. The stock diverter valves (DV) are plastic and connect with more plastic into the chargepipe and turbo inlet pipes. The plastic can become brittle and crack even on stock engines and leak boost, which leads to a loss in power and performance.

Turbosmart has developed two kits to replace and upgrade the stock diverter valves - a direct replacement kit (shown) and a combination DV/BOV "Dual Port" kit. This direct replacement kit includes new high-performance DV and stronger silicone hose to connect them to the turbo inlet pipes (Vargas silicone inlets are recommended). The Turbosmart Kompact DV will give you all of the strength and reliability you need to take your turbo build to the next level.

You will also need T#553932 

It is recommended for any vehicle where the boost pressure has been increased by an ECU software upgrade and for unmodified vehicles operating in warmer climates, as a solution to the many failures that have occurred, where the original rubber diaphragm splits, which causes a loss of boost pressure. Unfortunately the failure doesn’t always result in a check engine light as the valve can still be blown open by the boost pressure, so you may not be aware that you are losing power due to this.

Our alternative is a fully engineered solution offering significantly improved reliability. Our valve is piston based with no diaphragm to fail, and of all aluminium construction. It replaces the original unit with a pressure/vacuum operated piston valve that still also retains the desirable OEM ECU control over valve actuation.

In addition to the weak stock chargepipe, the factory N54 diverter valves can also be a source for boost leaks. The diverter valve takes overboost and re-directs it back through the intake and turbos instead of allowing it to pass into the intake manifold. It's the same as a blow off valve (BOV) but instead of releasing into the engine bay, it stays contained to the engine. The stock diverter valves (DV) are plastic and connect with more plastic into the chargepipe and turbo inlet pipes. The plastic can become brittle and crack even on stock engines and leak boost, which leads to a loss in power and performance.

Turbosmart has developed two kits to replace and upgrade the stock diverter valves - a direct replacement kit and a combination DV/BOV "Dual Port" kit (shown). This Dual Port Kit is a DV and a BOV together in one unit. An internal valve directs some of the charged air into the turbo inlets and the rest is dumped into the engine bay like a traditional BOV. The amount of boost released into the air is determined by an internal spring in the Dual Port unit (additional springs are also available). This allows you to custom tailor how much boost and BOV "whoosh" you hear. In addition to the DV/BOV combo, stronger silicone hose is included to connect them to the turbo inlet pipes (Vargas silicone inlets are recommended). The Turbosmart Kompact Dual Port will give you all of the strength and reliability you need to take your turbo build to the next level.

You will also need T#553932 

The stock valve on the N55 is prone to failure - the plastic often cracks, causing the valve to stop functioning altogether. 

This Forge valve unit is engineered with a piston, eliminating the diaphragm entirely. Additionally, the Valve is all aluminum - this is the solution to any failures associated with the OEM valve, making your N55 significantly more reliable. This unit retains the OEM ECU controlled valve actuation as well. Includes a plug and play harness that works with the OEM harness.

Turner Motorsport advises being cautious when removing the OEM recirculating valve; if the plastic is cracked, pieces could fall into the turbo upon removal causing serious damage.

This product fits the following BMWs:
2014+ F22 M235i M235iX