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How are stock GTR BOVs?

Merli

By Merli,
in Engines & Forced Induction

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whatsisname Grand Master

whatsisname

Posted
Posted

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?

whatsisname Grand Master

whatsisname

Posted
Posted

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.

Amaru Veteran

Amaru

Posted
Posted
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.

Merli Grand Master

Merli

Posted
  • Author
Posted

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...
N/A® Experienced

N/A®

Posted
Posted

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.

Merli Grand Master

Merli

Posted
  • Author
Posted

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

Guest INASNT

Posted
Posted
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

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