i would like to hear a sound clip
and i would also like to know how this affects idle with all your setups including the bypass/open loop, and the recirc setup
the only problem with blow off valves is they mess up the idle usually 9 times out of 10 and the car never really runs the same : \
usually blow off valves are made to form fit the stock setup or a larger turbo setup so anyone with anything in between suffers from poor idle, as an example someone with a CAI or an exhaust mod will have a different idle then what it is meant to give because these "aftermarket blow off valves" are made to spec for stock setups or larger turbo setups : \
i love aftermarket blow off valves and i have come from a few different turbo platforms such as 3000gt vr-4, supra mkIV, wrx, wrx sti, turbo datsun, stealth rt tt, and my friends soarer and rx-7 and i have gone through probably about 8 or 9 different variations myself and have been a part of about 12-15 different blow off valve setups from bypass to recirc setups, and with each blow off valve all of them ran poor idle.
the only one i had luck with was the 3000gt vr-4 with a recirc greddy rs BOV, it still idled weak but was the best luck i had and ran as close to normal as i could get it, however i had to adjust the throttle cable and the idle screw so it never really was stock. I was also burning more fuel at idle to fix the problem due to where i had to setup the idle screw and throttle cable
also that is extremely pricey for a no name blow off valve "no offense on the no name comment"