The

The "Boost Valve" boost controller - G2 Series BoostValve kit for VW VNT TDI

Price: $67.95
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G2 Boost Valve Manual boost control valve, acts as a safety to ptotect your turbo in case of a control system failure.

Ok so, what is it?

The Boostvalve turbo boost controller is an adjustable pressure relief valve or "check valve". Some may call this a "gated valve", but be certain it is NOT a "bleeder valve".
In simplest terms: It prevents boost pressure from opening the turbo's waste gate until the desired preset boost level is reached. Inside the valve is a precision stainless steel ball that is held in place by spring tension. During the turbo's spool-up (as pressure is building) spring tension in the valve is greater than the boost pressure pushing against the ball, so the ball prevents the air from flowing to the wastegate actuator.

This maximizes the efficiency of the turbo during the spool-up by using the greatest amount of air possible to spin the turbo charger. Most boost control systems waste air by venting much of the air out, even many factory boost control systems waste available exhaust energy during this crucial spool-up period. Once the turbo spools up to the desired boost, the Boostvalve opens, quickly opening the waste gate. Boost pressure is held at this level with accuracy unmatched by even more expensive methods of boost control.

Alright. So, why is it better than a "bleeder"? A bleeder valve is open all the time. Bleed valves work by fooling the waste gate into only seeing some of the boost pressure. The rest of the pressure is vented off, sometimes completely wasted by blowing out an open hose. Just like an air leak in any other hose this wasted air can cause problems with modern computerized engine controls. Additionally this causes the waste gate to open before maximum boost which can create turbo lag.
===== -- ===== G2 Boost Valve

New G2 series BoostValve features:

  • New quick boost adjust.  No more carrying around tools to set the boost.  Simply loosen the knurled lock ring, dial in your boost setting and re-tighten and you're done.  No more worries of the cap loosening up after you forgot to use a wrench on it.  (New adjuster caps can be used to update any of the old brass valves, see website parts page for pricing)
  • Integral Mounting Clip design.  The valve body is now grooved for a much more streamlined clamp to hold it in place.  Either using a black nylon loop or lightweight aluminum clip that easily snaps around the valve to hold it.
  • Longer adjustment range.  The new design allows more turns of the adjuster to give an increased range of boost adjustment.
  • Removable barbed fittings.  We now use easy to replace threaded fittings on the inlet and outlet ports.  High quality nickel plated, o-ring sealed fittings for durability and zero chance of boost leaks.  Now fittings are available for more hose sizes.
  • Re-located vent.  This is a small detail that many people may not even notice but the BoostValve has always had a very small vent hole to release any air trapped in the waste-gate line after boost pressure drops.  Many hours of testing on a huge variety of turbos led us to the correct port size.  Too small and your turbo will blow off too much boost between up shifts, causing lag,  too big and the boost will spike (that's why bleeder valves never really work right).  This is one of the key factors to what makes the BoostValve better than many of the other boost controller designs.  By moving the vent port to the adjuster cap, now its simply a matter of swapping caps to optimize the valve for any possible combo.  Or, for vacuum controlled waste-gate setups such as the VW VNT turbo use a non-vented cap for a completely sealed valve.

 

What comes in a Boostvalve  kit?


Ford 2.3L turbo kit shown.

When you order a Boostvalve kit for your car you receive all the necessary parts to complete the installation.  We use only the highest quality components. High pressure fuel injection grade clamps, high temperature chemical resistant hose, and quality American made nylon fittings and caps.

 

Will the Boostvalve work on my car?

When you order a Boostvalve kit for your car you receive all the necessary parts to complete the installation.  We use only the highest quality components. High pressure fuel injection grade clamps, high temperature chemical resistant hose, and quality American made nylon fittings and caps.

 

Can I install it myself?

Yes, most all of the installations can be finished in less than half an hour with basic hand tools. Adjustment is simple and once set, the valve will hold the desired boost. Easy to follow instructions along with tuning suggestions are included.


Boostvalve how to install VW TDI part 1/2


Boostvalve how to install VW TDI part 2/2

 

Can I install the Boostvalve inside my car?

You could but its not recommended. For best performance keep the hoses as short as possible. A long hose from the Boostvalve to the turbo may cause a delayed response from the valve adding to boost lag. And to be honest, adjusting the boost while driving is probably not a good "safe" idea.

 

How much boost can I set my car to use?

This of course depends on the car. Some cars are limited to less than 6 or 7 psi and some may run as high a 17psi with minimal modifications. The Boostvalve has a range from your car's stock waste gate setting to a maximum of approximately 21psi. High boost springs are available and are included in appropriate kits.

 

Does the Boostvalve require any maintenance?

All of the materials used are of the highest quality and will last for the life of the vehicle. The valve is constructed of high grade billet aluminum and stainless and should be virtually maintenance and adjustment free. If necessary, the valve can be easily disassembled, cleaned (brake cleaner or alcohol works good) and reassembled.

 

Why is the Boostvalve better than....?

Customer satisfaction is my main goal. I'd like to think my valve design is the best on the market, but I'm not going to make silly unsubstantiated claims just to say I'm better than others. I feel that I have a boost controller that is equal to or better than others costing hundreds of dollars more.
Whenever possible I photograph actual installs and work with owners when designing a kit for a new application. I encourage customer feedback to refine kit contents & instruction pages to offer the best possible boost controller for your car. Every kit listed has been tested on the car its intended for.


=== G2 Boost Valve

How do I adjust the boost?

Adjusting the BoostValve is simple. Turn the cap and secure with the locknut. To lower the boost unscrew the cap. To raise boost screw the cap in.  With the standard low pressure spring one turn is approximately a 1.5 psi boost change. When finished before going on a test drive always use a wrench to tighten the locknut, finger tight is not tight enough, the cap may vibrate loose if not tight. No need to really torque it down, just make sure its snug.
(A good general starting point for most cars: Screw the cap all the way in and then count back 6 turns as you unscrew the cap).

 

Do I need a boost pressure gauge?

A boost gauge is not absolutely necessary but it sure does help.  By using a boost pressure gauge you can monitor your boost before making any changes to the car and have a good reference point to start with. You'll see when the boost rises and how much boost your stock system supplies.  This way you'll always know how much boost you are running before and after installing your Boostvalve kit. We do offer an inexpensive gauge for temporary use if your car does not have a factory boost gauge you may want to consider purchasing this or any of the permanent boost gauges available from various suppliers.


item# TG-BV
 $32.99

 

I cannot set the boost pressure correctly.

First double check your install to make sure you followed the instructions correctly and most importantly did not install the valve backwards. The side port closest to the adjuster cap will always connect on the side that goes to the waste gate.  If you took the valve apart the ball is always placed inside first followed by the spring.

Boost is too low.

If no matter how far you screw in the cap and the boost stays at the factory level, there's a chance the ball is not sealing properly inside the valve due to debris or oil contamination. Unscrew the cap and clean inside the valve.  Use a solvent that does not leave behind any oily residue. Brake cleaner or isopropyl (rubbing) alcohol works fine. Do NOT use WD40, or carb cleaner both will leave a sticky residue.

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Boost spike can be a major issue with the VW TDI VNT turbo.  Back pressure or excess fuel can cause the boost to rise faster than the turbo's vanes can react. With age soot tends to accumulate and cause restrictions in the catalytic converter or exhaust   Spike and surge can cause the ECU to react by pulling out timing from the motor, this results in lower torque output. By installing the BoostValve as shown above this excess boost can be prevented.
The BoostValve is not used to raise max boost but to control spike/surge and effectively give better control of the turbo's wastegate.  No more surging or dangerous boost spikes.

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