jred - i say this b/c other people have said this. but i'm not 100% sure they are right. but i have seen clips of other tuned cars (turbo is300, supras, silvias), and they have this same flutter sound that we have. it's also been shown that simply replacing the bpv with an aftermarket one does not solve the turkey problem. i forget who it was that posted, but they used an hks ssqv but still got a turkey. hard pipes don't seem to cure it either. a wastegate would be common to all these cars so it makes sense that it could be this. but like i said, i'm not 100% sure.
rjspeed - all the bovs do what they're supposed to do, release pressure. so there's not exactly one bov that stands out from the rest. the only one that may be "better" than others is the hks ssqv because it utilizes a pull-type valve (meaning the pressure inside the pipes actually forces the valve closed). this means that the bov will not leak under boost. hks is the only one to use this design to my knowledge. others use a spring to force the valve closed while under boost.
the loudest is most likely the turbo xs rfl. this is supposed to be insanely loud. as they say, "if you need to ask, it's too loud for you." but hks, greddy, blitz, apexi, turbo xs, will all be loud.
no you don't need to hard pipes to run a bov. there's a company that makes a flange for both the hks ssqv and greddy type s that bolts on to the inlet of the bov. you can then run a 1" diameter hose to the flange. check it out at
www.8vturbo.com check out ryan's sig, he has this setup. he's also got bigger pics floating around. you can probably do this with other bovs/bpv though you may need to have a custom flange made.
