What's the deal with all these springs and shims? I'm planning on getting the Forge BPV here shortly as well but it sounds confusing! Does it come with a little box of springs and other little goodies and the directions say: "Good luck!" ??
Its not confusing. The only confusion was some of the older orders were sent with the wrong spring set. The bpv comes in a box with 3 springs and 2 shims. The stiffer springs are meant for the higher boost levels.
Yellow = weakest spring (shouldnt use even if stock)
Blue = middle (what 90% use)
Red = stiff ( when your pushing 20 psi)
Shims = each shim makes the spring a little stronger.
Install takes like 5 min and I never got instructions so I dont know what they say.
Basically just test out blue spring, blue spring + 1 shim, blue spring +2 shim
See which one feels best for you.