jast Posted January 13, 2003 Share Posted January 13, 2003 Thinking of getting a BOV, please can someone advise, IE: Cost, but most importantly, the loudness - grin factor!!! Also I dunno if im getting used to the Supes but Im sure its got slower!!!! Anyone else found this after owning it for 1 week?? Cheers, Jast Link to comment Share on other sites More sharing options...
Gaz Walker Posted January 13, 2003 Share Posted January 13, 2003 I've got a UK Auto with an HKS SSBOV that is rather tastey. Recommended. To get the noise, come off an open throttle Gaz. Link to comment Share on other sites More sharing options...
jast Posted January 13, 2003 Author Share Posted January 13, 2003 How Loud are we talking???? Also I notice that she makes a bit of a whuushh when backing off after a heavy dose of the old right foot.... Link to comment Share on other sites More sharing options...
michael Posted January 13, 2003 Share Posted January 13, 2003 I was under the impression that a BOV could cause issues on cars with AFM's - is this true of the UK Supra too or do other aspects of the engine resolve it? (I'm right in thinking the UK car has AFM and the J-Spec MAP aren't I?) Link to comment Share on other sites More sharing options...
SMW Posted January 13, 2003 Share Posted January 13, 2003 Gaz is spot on, the HKS one makes a great sound if you lift off after sharp acceleration:) Quite easy to do this more frequently in MANU mode. Link to comment Share on other sites More sharing options...
jast Posted January 13, 2003 Author Share Posted January 13, 2003 Hmmmm, What Issues can they cause??? Im running a standard j Spec, bar a full SS System, No CATS. Hitting around 1.0 bar, what will the BOV do, I mean apart from making you grin, whats the overall purpose. Sorry for being mr thicko again, Also about my supe seeming slower, u think its just me getting used to it. Thanks again. Link to comment Share on other sites More sharing options...
Gaz Walker Posted January 13, 2003 Share Posted January 13, 2003 Originally posted by mcanny I was under the impression that a BOV could cause issues on cars with AFM's - is this true of the UK Supra too or do other aspects of the engine resolve it? (I'm right in thinking the UK car has AFM and the J-Spec MAP aren't I?) Erm, its stalled the car once before due to the D/V - Was making a quick turn around in the road procedure (OK, so I done I doughnut I just didn't want to say it. What can I say, the mat was jammed on the accelarator ). But it has no effects during other driving. Gaz. Link to comment Share on other sites More sharing options...
michael Posted January 13, 2003 Share Posted January 13, 2003 Originally posted by jast Hmmmm, What Issues can they cause??? Im running a standard j Spec, bar a full SS System, No CATS. Hitting around 1.0 bar, what will the BOV do, I mean apart from making you grin, whats the overall purpose. Sorry for being mr thicko again, Also about my supe seeming slower, u think its just me getting used to it. Thanks again. I'm basing my comments on the MR2 and messages from Mr Wilson and his Skyline so I may not be 100% topical as far as the Supra goes but on AFM cars the BOV can cause the mixture to be too rich / weak because the ECU doesn't take into account the fact that the air has been vented, as far as it's concerned it's still in the system and being recirculated as normal - on cars with MAP sensors this isn't the case so on a J-Spec you should be fine. As far as what the BOV does - Psssssssssssssssssst is about the only think i ever noticed Link to comment Share on other sites More sharing options...
Adam W Posted January 13, 2003 Share Posted January 13, 2003 Turbo XS do some good stuff. Cheaper and simpler than the HKS and Blitz units, and very well made. I have the Type H-RFL, which is, as the name suggests, Really Fairly Loud (or something like that . . . ) Link to comment Share on other sites More sharing options...
Snowman Posted January 13, 2003 Share Posted January 13, 2003 see the best BOV induction thread. SS BOV on my Auto now. Lovely. Link to comment Share on other sites More sharing options...
Darren Posted January 13, 2003 Share Posted January 13, 2003 Have an HKS bov sounds the dogs............. Darren:) Link to comment Share on other sites More sharing options...
jast Posted January 14, 2003 Author Share Posted January 14, 2003 defo gonna get 1, how much we talking, also what about fitting, is it a big job???? Cheers Guys Link to comment Share on other sites More sharing options...
Snowman Posted January 14, 2003 Share Posted January 14, 2003 budget for about £300 ish and then be plesantly surprised when you find it for less. as for fitting I had Leon do it for me. didn't look the hardest thing to do but I always like getting a pro to do the work. Link to comment Share on other sites More sharing options...
Barry Posted January 14, 2003 Share Posted January 14, 2003 I have the blitz bov on my Jap auto. Cant hear it at all, unless driving through dartford tunnel playing silly buggers.! The idea of a bov is to release boost pressure as you lift the throttle. As you lift your foot off the throttle the boost pressure trys to go back to the turbo and without a bov the air has knowhere to go other than back into the turbo. This will cause the blades to stop spinning much more quickly than is good for them, shortening their life. The bov just vents that air out so the turbo doesn't have as much back pressure hitting its blades. Or something along those lines, I'm not that good at explaining things. Link to comment Share on other sites More sharing options...
Adam W Posted January 14, 2003 Share Posted January 14, 2003 Turbo XS ones come in at about £150 or so, and they're great . . . But you do ahead and buy an overpriced, inaudible HKS Super Squeaky Quiet Valve (or whatever it stands for) . . . mine will be more exclusive that way Link to comment Share on other sites More sharing options...
Neil Sandham Posted January 14, 2003 Share Posted January 14, 2003 Chris wilson did a detailed description about 6 months ago about why dump to atmosphere BOV's (ie the ones that go woooosh) should not be used on UK spec supras. Tried looking for it but cant find it. But yes, it makes the mixture lean. Basically, air gets measured and the corresponding amount of fuel therfore added at the injectors. However, between the measurement of the air and the fuel being added, the bov hasdumped some of the air to atmosphere causing the mixture in the combustion to be mad rich. The ecu then senses this and drastically cuts the injector cycle just as the bov has closed and huge amounts of air are coming back in to the cyclinders...hnce mega lean mixture for a small period of time until the ecu senses and compensates. Assuming you havnt backed off the throttle again and so the cycle repeats. chris do you still have it ? Jast as for the "seems slow bit" thats just because you getting used to it. Time for you to do some proper power mods now not these boy racer mods. cheers Neil. Link to comment Share on other sites More sharing options...
jast Posted January 14, 2003 Author Share Posted January 14, 2003 Yeah, your probably right neil, every day u drive it, u seem to get more used to the feel of the power etc, these cars really are the dogs. I do want a mega lound BOV, just always wanted one!! Link to comment Share on other sites More sharing options...
MONKEYmark Posted January 14, 2003 Share Posted January 14, 2003 Originally posted by jast Yeah, your probably right neil, every day u drive it, u seem to get more used to the feel of the power etc, these cars really are the dogs. I do want a mega lound BOV, just always wanted one!! if you want a loud one get a hks one. but wasnt there some issues wuth them? i got a blitz one on mine it says in adverts its loud but dont sound loud to me.but when you driving auto you wont get effect driving normal as your foot is on gas all time. you will get bored after a couple of days of doing the noises leave it for the max power boys in re turbos and renault 5 gtt Link to comment Share on other sites More sharing options...
Snowman Posted January 14, 2003 Share Posted January 14, 2003 In that case I may have to turn to the dark side and join the paddy field boys and our most honourable sensei Paul E! Link to comment Share on other sites More sharing options...
chrispazzi Posted January 14, 2003 Share Posted January 14, 2003 Originally posted by MONKEYmark ...you will get bored after a couple of days of doing the noises ... That means I should have got bored a month ago! Link to comment Share on other sites More sharing options...
Terminator Posted January 14, 2003 Share Posted January 14, 2003 I have an HKS BOV on my Jap auto. I still enjoy playing with it from time to time. Best (sound) results are in Manual mode as you have to lift off briefly between changes. As long as you have a reasonable level of boost when you lift off you get a ptSSSSSSSSSS loud enough to turn heads above the noise of my Hiper.:flame Dev Link to comment Share on other sites More sharing options...
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