Forge Motorsport Valve Spring Tuning Kit
Now you can fine tune your Blow Off/Diverter Valve to the exact needs of your engine with this complete tuning kit. Your valve tuning kit you will find four springs. We normally supply our valves, unless requested differently, with a spring that will match the tension of the manufacturer’s original fitment valve. However, as many owners undertake tuning modifications some may wish to re-tune the valve characteristics to suit a given application.
Valve Spring color coding: Green - 5-15 PSI, Yellow - 15-23 PSI, Blue - 23-30 PSI, Red - 30 + PSI.
*The above figures are estimates only and should only be considered as a guideline*
If you are finding that the valve is dumping more than required or you are loosing boost pressure, it is normally an indication that a stronger spring is required. Conversely, if the valve is failing to dump it may be necessary to install a weaker spring. For example, if during the tuning of your valve, you are faced with the red spring being too strong and the blue spring too weak, you can add the spacers/shims to the blue spring to increase the tension by small increments, thus achieving a setting between the red and blue springs.
Note: Fitting a stronger spring into a valve will not increase boost pressure unless existing pressure is being lost. Failure to allow the valve to operate by installing a spring which is too strong, may cause damage to the turbocharger.
Please contact us if you are uncertain whether this kit is suitable for your valve.
*Please Note - The colors of the springs illustrated may differ to what you receive. All spring kits are brand new but are not sprayed. Colour is used as an identifier*
Forge Motorsport Turbo Recirculation Valve MK4 1.8T
This turbo recirculation valve is the result of of 25 years of experience and engineering expertise. With the reputation for innovating and manufacturing the best automotive valves in the world, you can be certain that there is currently no better replacement valve available.
Forge's recirculation valve features a greater flow rate than the OEM Bosch Valve, aswell as a faster response time due to our revised design. By using the associated service kit (FMDVSK), as seen below, the life of the valve can be extended, and the performance can be maintained. It is fully customisable to fit your application with two uprated springs, aswell as spacers/shims, provided in the kit. Lastly, the valve has a compact design, meaning easy fitment under the engine cover.
Please select whether you want a black or matte silver valve, using the options above.
In The Box:
1 x FMDV008 Valve
1 x Uprated Yellow Spring
1 x Uprated Blue Spring
1 x Cable Tie
1 x 2.5mm Allen key
2 x 35mm Hose Clamps
1 x Instruction Booklet
1 x Forge Keyring and Sticker
Forge Motorsport The Splitter, a Recirculation and Blow Off Valve MK4 1.8T
The Splitter is a truly remarkable valve that gives a combination of blow off and recirculation valve operation, all at the same time, and has been specifically designed for the many turbo engined applications that operate metered airflow management systems. This means you get all the noise of the blow off valve whilst retaining the compatibility with the recirculation requirements of the engine management system. As a bonus we also offer the ability to convert the valve to recirculation only mode for those times when stealth running is required.
This valve uses a Brass piston which utilises new sealing technology along with a variable spring preload, incorporating a ratchet type top adjuster that will allow for the positive and precise adjustment to match the valve to your engine. This is achieved by using a unique single, conical, progressive rate spring, that can allow for the retention of boost pressure over a wide adjustment range. This unique spring design also allows for unrestricted piston travel and flow volume regardless of the amount of pre-load adjustment added to the spring.
Other manufacturers' valves use cylindrical springs with adjustable pre-load, which often experience restricted piston travel and a reduction in flow volume. When we say our products are Engineered For Performance, it's not a catchy sales phrase, it's the truth. and we prove it with every product we manufacture.
Note: This valve requires installing the opposite way to the original Bosch Valve. This means that the side pipe is fitted into the Turbo Intake Hose, and the base pipe connects to the hose that runs to the boost side of the turbo.
In The Box:
1 x FMDVSPLTR Valve
1 x Valve Blanking Cap
1 x Instruction Booklet
1 x Forge Sticker