Induction Posted August 6, 2002 Share Posted August 6, 2002 Hi Folks I had an HKS SSQV fitted about six weeks ago. The day it went in, a fairly regular passenger in the car remarked that they thought the car wasn't performing as well as he seemed to remember. I dismissed this and didn't think much more of it until about two or three weeks ago. I felt that the car didn't seem to have that 'pull like a train' sensation, as if the second turbo wasn't giving it's usual wallop. I spent about a week doing certain tests on the road to see if I could work out was going on and also noticed that under acceleration at about 3500 rpm, the car seemed to stop accelerating for a split second and then go again (the BOV gave a slight release noise as well). You couldn't really feel this, it was more noticeable because of the engine sound changing and the needle pausing on the dial that gave it away. I stated to become a bit concerned and whilst I was at Elvington at the weekend, I had a chat with who I believe is Leon (running a dark Supra, have heard his name mentioned on the board) and he suggested winding the screw on the BOV. I also heard another guy saying the HKS SSQV wasn't up to much. Anyway, last night I'd had enough and decided to put the stock BOV back on to see if it made any difference. Had a bit of trouble with the small diameter piping, but everything seemed to go back as it should. On a test the car seemed to have it's old legs back and pulled really well, the second turbo coming in nice and strong. This felt like a different car! I've got to say that I'm pretty confused now and am wondering what to do next, whether it be try the SSQV with the bolt screwed all the way in, (or should that be out), or to keep the stock BOV on there. I have noticed more noise as the first turbo starts to come online, a more pronounced whine, since I put the stock one back on and I'm unsure whether this means that one of the pipes isn't quite on right, although I have got jubilee clips securing both ends of the main pipe. This noise may have been there before the SSQV went on but I don't seem to remember it being as loud as this. Any suggestions on any or all of the above? Sorry for the long post, I've just realised how much I've written, but this problem is really bugging me! Thanks Quote Link to comment Share on other sites More sharing options...
lee_kelsey Posted August 6, 2002 Share Posted August 6, 2002 Although I can't offer any advice to the problem 'Induction', (don't know your name!) I have to say that when I fitted my SSQV myself, it made a remarkable improvement in performance. I think there would be many people to question the fact that the HKS BOV 'isn't up to the job', as this is one of the most popular at the moment! I would only suggest checking that the HKS BOV was fitted 100% correctly with all jubilee clips fully tightened (to prevent any leaking). Was the blanking cap installed along with the new BOV? Quote Link to comment Share on other sites More sharing options...
Alex Posted August 6, 2002 Share Posted August 6, 2002 Have you got a boost gauge? What boost pressure are you getting? The SQV is normally very good? Have you got an air leak when you put the SQV on? Is one pipe not firmly connected enough? Quote Link to comment Share on other sites More sharing options...
Induction Posted August 6, 2002 Author Share Posted August 6, 2002 The BOV was fitted professionally by ABP Motorsport in Nantwich and I chose the HKS SSQV because of all the good things that I'd read about it. When I collected the car I was told to expect a better pick-up. I'd love to get the thing back on and have the car performing as normal as I love the look and sound of it. Before I took it off I tried turning the bolt one full turn clockwise to see if it made any difference, but it didn't (I think I've seen something on the board where somebody says that their bolt is wound all the way out, what effect would that have and should it be something I consider doing as a test?) If everyone else who's running an SQV is happy and having no problems then this gives me encouragement that I can get the thing working properly again - if it is actually the cause of the problem. To answer the questions, the blanking cap was fitted and all connections were secured with juby clips. Just to clarify a few points on the SQV (and for my own peace of mind), the large diameter pipe goes into the BOV and the small diameter tube heads off into a disc shaped plastic connector, and a blanking cap covers the other connection. For the standard BOV, one large pipe comes into it, one goes out of it and ends up on the connector that has the blanking plug on it when the SQV is fitted, and the small pipe goes to the same plastic disc connector as with the SQV - is that correct ? Quote Link to comment Share on other sites More sharing options...
Alex Posted August 6, 2002 Share Posted August 6, 2002 Do you have a photo of it installed? Why not ask ABP to swap it under warrenty? If it doesn't work it's their problem. Quote Link to comment Share on other sites More sharing options...
Induction Posted August 6, 2002 Author Share Posted August 6, 2002 Alex I'm waiting for a call from them to talk about it. I'll put up a photo of the installation to look at. Jules Quote Link to comment Share on other sites More sharing options...
Terminator Posted August 6, 2002 Share Posted August 6, 2002 (Quote)Just to clarify a few points on the SQV (and for my own peace of mind), the large diameter pipe goes into the BOV and the small diameter tube heads off into a disc shaped plastic connector, and a blanking cap covers the other connection. For the standard BOV, one large pipe comes into it, one goes out of it and ends up on the connector that has the blanking plug on it when the SQV is fitted, and the small pipe goes to the same plastic disc connector as with the SQV - is that correct ?(Quote) I just fitted one my self, took about 15 minutes and it is working very well. My connections maintain the PS pump links, yours sounds like it does not. If I understand correctly you have a connection going fron the old stock Boc Vac point all the way over to the new Bov and the PS pump - Induction chamber link is blanked off. Sounds like your installers messed up IMHO. Quote Link to comment Share on other sites More sharing options...
lee_kelsey Posted August 7, 2002 Share Posted August 7, 2002 Some pics to help understand how the SSQV should be installed! This is exactly how I installed mine, although these pics are taken from mkiv.com. Quote Link to comment Share on other sites More sharing options...
Terminator Posted August 7, 2002 Share Posted August 7, 2002 Disregard my last post, my install is using a hard pipe with the BOV mounted by the throttle body. Quote Link to comment Share on other sites More sharing options...
Branners Posted August 7, 2002 Share Posted August 7, 2002 Hopefully CW will step up to answer this one....what are the benefits and draw backs of fitting the BOV pre and post intercooler? I had mine mounted on the hard pipe running up to the manifold and kept the stock BOV in place as well, almost everybody else seems to mount it where the stock BOV went... JB Quote Link to comment Share on other sites More sharing options...
Induction Posted August 7, 2002 Author Share Posted August 7, 2002 My BOV is mounted in exactly the same way as the pictures show. The only difference is that the small diameter pipe on mine is about twice the length of the one in the pics - would it help to make this shorter? I put my HKS BOV back on last night and made sure all connections were really secure and tight. Took the car for a run and it seemed fine, very similar to the stock BOV. This started to make me wonder if it is something to do with ambient temperature and that the HKS BOV being at fault could all be in my mind. The outside temperature gauge was reading 17-18 degrees last night so could it be that the car was just thriving on the cooler night air, or that the connections needed re-seating and tightening, or a combo of both? And what are the pros and cons of either winding the bolt in or out on the BOV? Which way stops boost being released too early, etc, etc? Quote Link to comment Share on other sites More sharing options...
mrboost Posted August 7, 2002 Share Posted August 7, 2002 Well Me and Justin fitted mine, The small pipe we cut down to suit. The pipe suplied is very long for alternative fittings, so I would cut that down, also my screw setting is as far out as it will go, without it falling off, about 1.5 turns in. Hope that helps. Martin Quote Link to comment Share on other sites More sharing options...
Induction Posted August 7, 2002 Author Share Posted August 7, 2002 Martin Thanks for that. I'll probably take the length of the tube down as I think I've got more on there than needed. I'll try winding the bolt out more like you mention. Is it a case of the more the bolt is out the less likely there are to be leaks? Jules Quote Link to comment Share on other sites More sharing options...
Alex Posted August 7, 2002 Share Posted August 7, 2002 Phil, Just so as you know the position your BOV is in is technically the OLD position. HKS changed the fitment kit to put it in the stock BOV location (on a normal sequential turbo'd Supra). Quote Link to comment Share on other sites More sharing options...
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