Jump to content
SAU Community

Recommended Posts

Andrew,

A good mate of mine up your way (his nick is 'third' on SAU) has been researching this exact topic recently! He has a '97 GT-R with a quite a few mods (311awkw SAS dyno) & at times runs 20+psi.

As you can imagine he's had a wide range of responses on the stock BOV topic. Jim from CRD seemed to think the stock BOV's weren't a problem even at mid 300kw levels (at wheels). We asked a few local Adelaide tuners & one of them said straight away that above 15psi & they "can" leak.

He is planning on doing a bench level pressure test to see exactly what psi his BOV's open, may have already done it?

No prob's mate. It 'may' take a little while for him to reply as he's not a frequent SAU user (posted twice in total) Tell you what, I'll give him a ring tonight & see what he's got to say.

Do they leak easily?

I'll be running upto 1.5  bar... Will the stock BOVs be okay? Or will they be leaking causing me to stress the turbos out unnecessarily to make 1.5 bar at the plenum?

Theyre crap, want to sell them to me or trade for Blitz DD setup? :):D

Being serious though, ive been told by many a shop they can hold decent amounts of boost without leaking (upwards of 1 bar). If you do take them off, send me a PM as ill be extremely interested in buying them. The Blitz ones are cool and all, but nothing compares to the woosh noise the stock ones make.

Hey, thanks heaps for the help guys!

Amaru: I'll probably end up replacing them with a single Trust Type-R BOV in a few months time... If I do, I'll send you a PM...

YRL05S: That would be great, but does your compressor have variable psi? If not, how will you know what pressure it takes before they open? Let me know how you go :)

  • 2 months later...

Merli,

I have used Blitz ones and they make the car run terrible. Boost isnt responsive and idle is horrible. On recommendation from HKS Japan, I have returned to the standard GTR ones. Even HKS do not recommend replacing the bov. Even if using a hks item.

Quote: "BOV changea.. noo good.." "Original good"

FYI: this was for a gtr running 2530's.

Whoa... this is an old thread! :D

Butthead: I'm not going back to stock BOVs, I have them on there at the moment, and I was worried that they would open prematurely and leak, causing my turbos to spin extra hard to make the 1.5-1.6 bar I want at the plenum... So I started this thread to see if I would need to change to a Trust Type-R or something like that... Seems like the stockies will work just fine!

Thanks N/A... Sounds like the stock bovs are going to stay! :(

Kamikaze: Not sure whether they're spring or diaphragm-type bovs... In fact I don't even know if there's a difference :)

Guest INASNT
we should ask leewah how they are as he still uses them on the 500rwkw plus gtr

the ice supra which has 400+rwkws runs these aswell aparently

niges supra is putting down 500rwkw with 2 bar boost now and still using stock GTR bovs just like Leewah, so i guess they aint that bad.

I got some in my car now as well and its holding 19psi and 280rwkw easily

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
×
×
  • Create New...