ripped_fear Posted November 7, 2015 Share Posted November 7, 2015 So following on from a previous thread, I'm now looking at fitting a BOV to my BPU supra, currently running no BOV at all. Now a member has kindly lent me their HKS one to trial, to see if I like it before I buy one. (very kind of him) Just taken a look tonight for the first time, now looking online it seems very simple, block off the top pipe (Already done as I have no BOV) then bolt to the other pipe, and plug the vac line in and away you go. Now my car has a HKS boost controller and this appears to be using the vac line I need, now I want everything I do to be reversible so what do I do? Would I plug the BOV in then T the boost controller off it? The last issue is the vac line looks to be too big to attach to the bov so guessing you require something to step it down? Here is an image I found Google of fitting- And Here is how my current set-up is fitted- Vac differences Link to comment Share on other sites More sharing options...
fastcar Posted November 7, 2015 Share Posted November 7, 2015 Just T into where your boost controller is Link to comment Share on other sites More sharing options...
ripped_fear Posted November 7, 2015 Author Share Posted November 7, 2015 Just T into where your boost controller is Ok so the bov would be T'd into the controller, not the other way round? That sucks as I have to cut the hose, anyone know the size and I will buy a length of it to trial. And what size piece would I need to step it down to fit on? Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 7, 2015 Share Posted November 7, 2015 Doesn't matter which way round, either device just sees the hose attached as a source of boost or vacuum. Link to comment Share on other sites More sharing options...
ripped_fear Posted November 7, 2015 Author Share Posted November 7, 2015 Excellent thankyou both for the input Anyone know what piece i need to step the vac pipe down? and what size the OEM vac line is so I can buy a length? Link to comment Share on other sites More sharing options...
listy Posted November 7, 2015 Share Posted November 7, 2015 On mine I had the same problem. I ended up putting a smaller ID hose over the nipple, and then a larger ID over that to create the "step down". Like it is in the picture you have up, but rather than a join in the middle, the smaller ID hose is inside the larger one. Link to comment Share on other sites More sharing options...
ripped_fear Posted November 7, 2015 Author Share Posted November 7, 2015 Thanks mate reducers seem cheap enough just need to know sizes is all. This looks like it could be right- http://www.ebay.co.uk/itm/4mm-to-6mm-Aluminum-Vacuum-Hose-Joiner-Reducer-Adapter-Connector-Silicone-Vacuum-/281377111367?hash=item418361fd47:g:7BUAAOSw9NxTta8X Link to comment Share on other sites More sharing options...
fastcar Posted November 7, 2015 Share Posted November 7, 2015 I think the hard metal vac line is 6mm Link to comment Share on other sites More sharing options...
ripped_fear Posted November 7, 2015 Author Share Posted November 7, 2015 Brilliant thanks guys so should the picture below be correct? If So where can I order all the parts needed? Just so its from one supplier. All this just to test to see if I like it lol. Link to comment Share on other sites More sharing options...
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