mctwistuk Posted February 9, 2008 Share Posted February 9, 2008 After the meet on Thursday night and hearing a few of the cars with BOV's it has got me thinking do i want one?????????? Have never really wanted one before but now i am getting the itch to buy one. I know a lot of people run the HKS type but these are quite expensive. What is a cheapper alternative and what are the implications of fitting one? Link to comment
cullenmin Posted February 9, 2008 Share Posted February 9, 2008 Occasional pops and bangs during a spirited drive, only if you've got a full de-cat also Link to comment
wimpy Posted February 9, 2008 Share Posted February 9, 2008 Occasional pops and bangs during a spirited drive, only if you've got a full de-cat also Bailey's are not bad for cheapness or forge. but you get what you pay for. Have a look on flebay sometimes get a good deal on there. Iain Link to comment
thewelsho Posted February 9, 2008 Share Posted February 9, 2008 ... what are the implications of fitting one? The annoying PSSSSHHHHHHHHTTT every time you change gear! I'm sure it would sound cool to start off with, but after about ten minutes of that, I think it would drive my up the wall, hence the reason why I don't have one! Though I have to be honest and say I did think about it! Link to comment
Carson Posted February 9, 2008 Share Posted February 9, 2008 (edited) What year's your car mctwistuk? Instalation is simple enough on all years. Ive got my old blow off valve in perfect condition! 50quid and its yours, ill fit it for you if your not car orientated EBAY - My old valve chris @ paisley area Edited February 9, 2008 by Carson Link to comment
oobster Posted February 9, 2008 Share Posted February 9, 2008 I had one on my WRX for over a year - car ran better once I put the standard one back on. My understanding is that your car will run ok if it's mapped with a VTA valve on, but if not the car can overfuel slightly resulting in some petrol mixing with the oil & thining it out. Or so I understand it anyway, from reading posts on here +SNet. I changed the oil in mine every 5K when I had the VTA on, just in case. Link to comment
p1ggm Posted February 9, 2008 Share Posted February 9, 2008 hks all the way, its the best by miles, i would say no to a bailey one tbh, turbo smart, turbo xs ones are good Link to comment
dipsy Posted February 9, 2008 Share Posted February 9, 2008 I can hear the standard one more after fitting a green panel filter Link to comment
Carson Posted February 9, 2008 Share Posted February 9, 2008 mates got the baileys, his car over fuels Link to comment
shane Posted February 9, 2008 Share Posted February 9, 2008 I can hear the standard one more after fitting a green panel filter I've had a GFB on my WRX for about 3 months, it's a 50/50 so not massively loud. It's a bit annoying sometimes when you are trying to drive normaly and it goes off during a gear change, if you change gear slowly and with a light throttle it is possible for it not to go off. It does sound great when blasting it through the gears though. Link to comment
gus the bus Posted February 9, 2008 Share Posted February 9, 2008 Wouldnt put one near any of my Subaru's Link to comment
ally-b Posted February 9, 2008 Share Posted February 9, 2008 I've been asked a few times what dump-valve I have on mine as it has it makes the ptssshhh sound It is the standard re-circ one - but you can hear it clearly cos of the APS cold air kit Al. Link to comment
mctwistuk Posted February 9, 2008 Author Share Posted February 9, 2008 What year's your car mctwistuk?Instalation is simple enough on all years. Ive got my old blow off valve in perfect condition! 50quid and its yours, ill fit it for you if your not car orientated EBAY - My old valve chris @ paisley area thanks for the offer. By the sounds of it the car is better to keep the standard one on it. Will need to think about this more. Chris Link to comment
scientific steve Posted February 9, 2008 Share Posted February 9, 2008 i had a bailey one at first and found it was pretty bad at motorway speed (70 ish) as it would leak and sound like it was just on the boil (if you know what i mean) now have a hks one fitted and you can get away with out it giving the pphhhhhhssssssst at lower rpm as it has a sronger spring and is suited for higher boost Link to comment
Carson Posted February 9, 2008 Share Posted February 9, 2008 Just noticed your footer, your car wouldnt take the my valve anyway bud. New age's have a standerd valve that helps presure issues the old classics had so id be happy with yours,If moneys no object get the cold air induction kit and that should spice up the sound? Should sound like this? correct me if im wrong Link to comment
johnnyr6 Posted February 9, 2008 Share Posted February 9, 2008 I fitted an apexi ind. kit and you car hear the standard recirc working. I wouldn't put a bov on my car unless my set up dictates one ( e.g. twisted turbo with external wasegate) and it's been mapped to suit. Johnny Link to comment
mctwistuk Posted February 9, 2008 Author Share Posted February 9, 2008 I've been asked a few times what dump-valve I have on mine as it has it makes the ptssshhh sound It is the standard re-circ one - but you can hear it clearly cos of the APS cold air kit Al. would love a CAI kit but can't afford the remap the now although APS say that the 60mm one is ok without remap. Could this be true??? Link to comment
dipsy Posted February 9, 2008 Share Posted February 9, 2008 (edited) Mctwistuk send Andy F a email about CAI kit and remap he will keep you right Edited February 9, 2008 by Dipsy Link to comment
mctwistuk Posted February 9, 2008 Author Share Posted February 9, 2008 Mctwistuk send Andy F a email about CAI kit and remap he will keep you right just sent the master an email and await his words of wisdom Link to comment
thewelsho Posted February 9, 2008 Share Posted February 9, 2008 Mctwistuk send Andy F a email about CAI kit and remap he will keep you right Yes, and I'll bet he will advise you against it. Link to comment
Boyakasha Posted February 9, 2008 Share Posted February 9, 2008 I've been asked a few times what dump-valve I have on mine as it has it makes the ptssshhh sound It is the standard re-circ one - but you can hear it clearly cos of the APS cold air kit Al. Al this is exactly what I was going to say, the sound of the APS CAI on my MY07 STi is awesome, you don't need an aftermarket BOV as the standard one sound great. I used to have an HKS SSQV on my MY03 STi which was nice but I'll be sticking with the original BOV now. Link to comment
wilky Posted February 10, 2008 Share Posted February 10, 2008 If your hell bent on fitting a dumpvalve then do it just before a remap and in most cases it can be taken into account during mapping giving minimal ill effect. On a factory ecu map the car is mapped to take into account the fact that when the engine "dumps" boost the air which has been seen by the ecu will be returned into the system again, and the fuelling set up for this. When you dump that air into the atmosphere to get the desired sound and hard on, and its fuelling has not been adjusted to take this into account the ecu doesnt know the air isnt going back into the system, supplies fuel for it anyway and the car runs rich momentaily hence pops and bangs. In the worst case scenario under full load wide open throttle when you change gears and dump the boost, the excess fuel can cause borewash, ie the excess fuel doesnt ingnite runs down the cylinder wall into you sump and dilutes your oil. Its not much but many WOT gear changes and many wee bits of fuel soon add up. This was happening on a car I know and refitting the standard DV solved the issue. Link to comment
shane Posted February 10, 2008 Share Posted February 10, 2008 Surely this is less likley (<50%)with a 50/50 BOV ? Link to comment
colzo Posted February 10, 2008 Share Posted February 10, 2008 This subject has been done to death on ScoobyNet and the outcome is always 'don`t bother'. I had a Forge one on my P1 and thought it was 'cool' at the time of having it, but it was also jerky when accelerating. Mike Wood from Prodrive said its a big no no as your standard one is fine unless your going for big BHP. Link to comment
mctwistuk Posted February 11, 2008 Author Share Posted February 11, 2008 If your hell bent on fitting a dumpvalve then do it just before a remap and in most cases it can be taken into account during mapping giving minimal ill effect.On a factory ecu map the car is mapped to take into account the fact that when the engine "dumps" boost the air which has been seen by the ecu will be returned into the system again, and the fuelling set up for this. When you dump that air into the atmosphere to get the desired sound and hard on, and its fuelling has not been adjusted to take this into account the ecu doesnt know the air isnt going back into the system, supplies fuel for it anyway and the car runs rich momentaily hence pops and bangs. In the worst case scenario under full load wide open throttle when you change gears and dump the boost, the excess fuel can cause borewash, ie the excess fuel doesnt ingnite runs down the cylinder wall into you sump and dilutes your oil. Its not much but many WOT gear changes and many wee bits of fuel soon add up. This was happening on a car I know and refitting the standard DV solved the issue. Thanks for the words of wisdom Callum hey are much appreciated. Think i am going to wait and get either an RCM induction it or an APS CAI and fit it just before my remap. Link to comment
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