R32 GTR BOV Leak

[Stixbnr32]

I seem to have sprung a leak.

Gas mileage has gone down and I seem to hear a leak underload.

When I got it tuned (401kw) I remember the tuner had issues with my BOV's and he resolved it but told me that they could cause issues.

So if I order a Greddy Type R BOV (one big one) how do I install it?  I should need to retune it or anything like that?

Thanks Again.

[Dose Pipe Sutututu]

I suggest drive it back to your tuner/mechanic/fabricator and tell them to install it.

If you're asking the question how to install it, then it seems it might be best left to someone that knows how to.

I'm assuming that is just a generic BOV and not model specific, if so that would require some modding and fabrication.

[Stixbnr32]

Yeh good advice.  Spoke to my tuner he said the stock ones can some times lift causing a leak.  Also said the type r ones the o ring and blow out and also not seal.  

Tial seems to be the way to go but would need some fab work done and to remove the recirc system since I am on MAP and not AFM's.

Sweet think I have my solution sorted.

[burn4005]

GFB do BOVs called mach2 that fit the stock location. model number is T9105 for the pair. they do make outlet adaptors that are the right size for the GTR recirc pipe, so they're a direct replacement but you'd have to call and order them direct from GFB, not from a reseller. about $350 from memory.

I've got two installed in place of the stock ones that failed a boost leak test and they are working great. they were a direct fit, plug and play,.

 

Edited September 26, 2018 by burn4005

[mr_rbman]

Has anyone just removed / bypassed the BOV's when they run into issues?

I'm convinced the whole myth surrounding BOV's prolonging turbo life has been well and truly debunked...

So is the only benefits to keeping them not getting the fully sik hectic flutter or is there something I'm missing?!?

 

 

[Stixbnr32]

21 minutes ago, burn4005 said:

GFB do BOVs called mach2 that fit the stock location. model number is T9105 for the pair. they do make outlet adaptors that are the right size for the GTR recirc pipe, so they're a direct replacement but you'd have to call and order them direct from GFB, not from a reseller. about $350 from memory. 

I've got two installed in place of the stock ones that failed a boost leak test and they are working great. they were a direct fit, plug and play,.

 

Real good to know ill look into it.  

 

Thanks for that - that would work perfect and easy to fit.

[GTSBoy]

58 minutes ago, mr_rbman said:

I'm convinced the whole myth surrounding BOV's prolonging turbo life has been well and truly debunked...

So is the only benefits to keeping them not getting the fully sik hectic flutter or is there something I'm missing?!?

 

BOVs (in OEM applications) have never been about preventing turbo damage.  On Nissans, the better term for a BOV is "compressor bypass".  What they actually do is;

1. Allow air to flow around the compressor (instead of through it, with the restriction on flow that that presents before the compressor is spinning fast enough to not be an obstruction) which gets air into the engine easier/faster allowing it to generate exhaust gas flow faster and get the turbine spinning the compressor earlier - AND simultaneously, because the air is not flowing through the compressor the mechanical load on the compressor is reduced and that allows it to spin up with less drive power from the turbine.  Result - reduced boost threshold.
2. Vent the air on gear changes or throttle modulations back to the inlet of the compressor to do the obvious thing, which is prevent the back pressure from slowing the compressor, but the return of the air passing through the compressor also helps to keep it spinning as well - so a double advantage there.

These effects are small, but they must have been noticeable enough for the OEMs to bother putting recirc valves onto these engines, because otherwise the complexity looks unwieldy and unnecessary.

[Dose Pipe Sutututu]

well said Sir @GTSBoy

Also modern cars open the bypass to allow turbos to get to speed much quicker before shutting them down, hence they're driven by solenoid rather than vac/pressure.

Dose/Flutters/Pigeons (not the real one) don't destroy turbos, but don't ever tell an American that. They will post up endless photos of blown compressor wheels and turbo destruction.

Dose is sick, delete your BOVs.

 

One thing I forgot to say, BOVs do have their purpose - on cars running big boost, there are chances on hard throttle closing events - the pressure pre-throttle body side spikes and at times can exacerbate hoses blowing off and throttle plates bending!

[Stixbnr32]

Found the adapter and the GFB kit and ordered.  

Cheers.  Hope this fixes the leak I can hear on boost haha.

[burn4005]

I hope you called them as you need 38mm adaptors to suit the GTR piping (part number 5238). and they are NOT a listed part on their website or through resellers.

[Stixbnr32]

Yeh I have talked to them its all sorted apparently and on the way.

[WantGTR]

No bov. No leak.

[burn4005]

Big single turbos sound f**king stupid without a bov. I got sick of it after about 60 seconds when i tried it on mine (hooked BOV lines to pre-throttle source to keep them shut)

https://youtu.be/d6I7_Or4w7c?t=1m18s

Edited September 27, 2018 by burn4005

[mr_rbman]

Fantastic info as always 

[Dose Pipe Sutututu]

Dose & Gate = Cocaine & Strippers

[WantGTR]

2 hours ago, burn4005 said:

Big single turbos sound f**king stupid without a bov. I got sick of it after about 60 seconds when i tried it on mine (hooked BOV lines to pre-throttle source to keep them shut)

https://youtu.be/d6I7_Or4w7c?t=1m18s

Lol dat dose.

Get yourself a gtx. Hardly any dose.

[burn4005]

lol the only Garret that might displace my EFR is a med/large frame G series if/when they ever get released.

[sneakey pete]

The EFR with BoV enabled has a pretty good ratio of noise to not sounding like a dick, for me at least ?

[burn4005]

true,I'm not using it, want to be able to change turbos easily without mucking around in future.

 

its a bloody small hole for a 9180 compressor though considering its the same size as the one on the 6258.

[Stixbnr32]

Installed.  Work mint and I think I may have solved my issue.

Will find out back at the strip this season