scottydouk

iTrader: (3)

Just curious to know what spring people are using in their forge bov, mainly referring to the atmospheric valve.

so, valve Spring color coding: Green - 5-15 PSI, Yellow - 15-23 PSI,Blue - 23-30 PSI,Red - 30 + PSI.

but from what I understand it's not the boost pressure you compare with for spring rating, it's more of a vacuum reading need to look at?

would anyone know what spring to use on a classic impreza running 30psi/2 bar of boost? And more boost on my meth Map.
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thanks in advance.
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