I see people with different set ups. I see some people put the blow off valve on the intake piping and some on the turbo piping. what?s the difference
Simple. The ones who put them on the intake pipes are complete drongo's!(the intake pipes are NOT pressurised).
The intake pipes that lead to the throttle bodies? I think you'll find they are pressurised. When the throttle snaps closed they let off pressure. Oh, unless you mean intake pipes right after the AFM, but who has them there?
Yeah, stupid Go Fast Bits the drongos! http://www.gofastbits.com/index.php?parentid=faqs&option=faqs&sub_option=faqs_bovs He must of meant the AFM side, not the charge pipe. Ay Chili?
There is only one setup. I think everyones confused with the wording. The BOV is placed factory down low (after the intercooler) or aftermarket up high (before the throttles), all after the turbo. If using a retric, then it can go back in somewhere after the AFM so the engine still consumes metered air.
Well, he did differentiate between "intake piping" and "turbo piping"(and as everything between the turbo and the throttle body is "turbo piping"), it seems logical that everything from the air cleaner to the turbo is what he means when he says "intake piping". Alternatively, everything from the air cleaner to the inlet valves, is considered "intake piping". Take your choice.:biggrin::zlove:
these are your options of installing bovs (as far as i know it doesnt matter which out of the two you do): 1. remove stock recircs and install bovs in stock location 2. install bovs in engine bay but remove/block stock recircs
Is it? I would have thought the pipe has the same pressure all the way along, so it wouldn't matter where the pressure relief occurred? That's just my thinking it through though, haven't seen any tests either way.
It's just a damn shame the kits are so pricey, ~$1K. Is there anyone out there running the turbosmart package for the Z? Then again having them mounted in the OEM position is good in the way it is out of sight. (from the police) Is there much of a trade-off, honestly, from having the BOV's further from the Throttle Bodies?
Why do you even need a kit? Buy the bovs and install them yourself, it's not rocket science. I dont think it's detrimental to the point that it'd hinder performance for the average person but I see the logic behind the theory. Think of trying to dump 40lbs+ of boost out in a hurry, due to the velocity of the air it mightn't escape entirely if it's venting well past the tb. I'm just taking a guess though, but it makes sense.
for installing a non plumb back bov in the recirc valve location, does it matter which of the two larger hoses are blocked??
Sorry for a noob question, but wouldn't there be some welding involved in installing bovs? If so, it's not exactly a walk in the park to someone who's never welded before.. -Kirill
Even then you still dont need a kit, it's probably 1 hour labour to pay somone to do it for you and even 1 hour is a little on the long side for such a job. Good bovs are $200 each, not $500 each.
welding is only needed if your installing your bov's in the engine bay. otherwise, replace your stock recircs with bov with no modifications needed.
Yes it does matter. The bottom hose is the pressurised hose and the side hose is the recirc hose. For a non plumb back BOV you need to plug up the side hose and install the BOV onto the bottom hose and connect the vacuum line on top. I am whats commonly known as mechanically inept and I installed BOVs myself. Took about an hour. Make sure you take the thermo fan out, makes it much easier, there's a good tech article on it. As for whether you need welding, if you use the stock location and a direct swap BOV such as most GFBs then you don't need anything else, if you use a different style BOV then you will most likely need an adaptor. I know this because I had two different BOVs at home that were free and because I'm tight I installed them, so I have two different BOVs :bash: One is a GFB (direct bolt on) and the other is a no brand one which I got a mate to make an adaptor for. They both sound copmpletely different and I reckon it sounds pretty cool :bash::bash::bash::bash::banned: Hope this helps a bit. :zlove:
would it be ok to just pull them out and close the holes? would it do any damage runing with out bovs? i think it sounds better.
this has been covered many times before. search it. some people say it does, some people run it and say it doesnt. you will get a flutter noise from air bouncing back onto the turbine which slows its spin down. some say you lose power between gear change, other says if you make a fast gear change you wont feel anything. Also ive heard that its not great for your turbo that air is being pushed back onto it. search and you will find all answers, try "recirc valves" should be a thread started by me with everyones answers in it
