Forge DV's: yellow or green spring?
 

I bought a set of Forge diverter valves that bring a green spring installed and spare yellow spring. Which spring is best?

The transition from green to yellow is said to be somewhere in the 650 - 700 bhp range.

Louis

flashed ecu and up use yellow springs

Based in the article below, i will try first the diverter valves with the yellow spring.

Valve Spring Tuning Kit

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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 and three spacers. The strongest spring is the red, followed by the blue, yellow and finally the green which is the weakest. The spacers enable you to fine tune the settings between two spring tensions if required.

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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.
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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. If during this tuning of your valve you are faced for example with the red spring being to strong and the blue spring to weak, you can add the spacers to the blue spring to increase the tension by small increments, thus achieving a setting between the red and blue springs.


Valve Spring color coding

Green - 0.3 - 1.0 BAR

Yellow - 1.0 - 1.6 BAR

Blue - 1.6 - 2.0 BAR

Red - +2.0 BAR


The above figures are estimates only and should only be considered as a guideline
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Please 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 to strong may cause damage to the turbocharger.
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Please note - the red coded springs should not be installed in the DVR or DV007 diaphragm valves

very nice thread...

Hey Tiago, Just curious if you have tried both the green and yellow spring? Did you realise any difference? I currently have the green ones on my car as I lost the yellow ones while unpacking, I just wanna know is it worth getting the yellow ones shipped in?

Thanks in advance!

I have Forge 008 too.
I use the yellow spring with a tune(1,0bar) and exhaust.