Forge BPV question? Green Blue or Yellow Spring? No red?

[08_MS3_GT]

I didn't notice additional engine movement but I have the Corksport rear MM inserts. What spring did you use, and did you use any shims?

the inserts are probably the difference. i suppose it's not necessarily engine movement so much as "whole car" movement. with the more responsive DV, my car really shifts its weight when i go from full spool to no throttle. it can make the next shift more difficult.

i am using the blue spring with two shims, as it seems to be the most common configuration i've heard of people using.

 

[SubieKiller3]

anybody got pics of their bpv installed?

 

[08_MS3_GT]

anybody got pics of their bpv installed?

it looks like the stock BPV, only either shiny (black) or silver.

 

[jezterr]

sorry, skimmed through the thread but didn't find a direct answer... would it be safer to go with a too stiff spring than a too soft spring?

i don't have a boost gauge of any kind right now, so i can't measure it in anyway. i just want to make sure i'm not damaging anything with having this bpv in.

 

[fastdreams]

sorry, skimmed through the thread but didn't find a direct answer... would it be safer to go with a too stiff spring than a too soft spring?

i don't have a boost gauge of any kind right now, so i can't measure it in anyway. i just want to make sure i'm not damaging anything with having this bpv in.

Softer is safer. Too stiff then the excess pressure can't vent and spins the turbo faster than it should, potentially damaging it.

Worse case with softer is that you release boost sooner than necessary, make less peak boost, and make a little less power.

 

[dkswim]

Softer is safer. Too stiff then the excess pressure can't vent and spins the turbo faster than it should, potentially damaging it.

while true softer is safer.
to stiff BOV/BPV will not vent when you let off all the presurized air will flow backward and out the turbo the wrong way. either causing sudden stoppage or spinning in the wrong direction and that what will cause the dammage

 

[Speedfreak1120]

to stiff BOV/BPV will not vent when you let off all the presurized air will flow backward and out the turbo the wrong way. either causing sudden stoppage or spinning in the wrong direction and that what will cause the dammage

aka compressor surge, search is your friend.