gtr bovs max hp

[markr34gtr]

been reading a few posts about gtr bovs..seems to be a few dif opions...

tested mine yesterday with an air line and tee fitting with a reg to put air on both sides of the bov at the same time to see if it holds say 20psi or more...

seemed fine at even much higher than 25psi...so whats the benifit of after market bovs like the greddy type r etc....

is the air flow of bigger turbos the reason they start to open at higher boost levels...

cheers..

[meshmesh]

after reading some threads, I'm sure I remembered the gtr BOV's were more than good enough for High HP applications & there was no need for AM BOV's...

Could be wrong, but also interested.

[JAGR33]

Standard GTR blow off valves can handle big HP...

Just look at Leewah and Nigel from Ice, both running these bov's and both over 500rwkws...

Must say something.....

[markr34gtr]

yeh i am starting to think the same after our test they would hold 30psi without leaking...

with the same boost pressure on both sides of the bovs....

cheers,

[Guest RedLineGTR]

Leewah from what i have seen runs more than 30psi with the gtr BOV's

[N I B]

Factory GTR BOVs are the best so never change them.

[Ronin 09]

I have heard that some oil coolers may require after market BOVs for GTRs (have been looking at jap oil coolers) ie. if they are mounted in RHS front area...

otherwise, why change them? they work perfectly.

[JAGR33]

Yeah Ronin, that's the Trust 16 row oil cooler kit, I learnt the hard way...

Sent it back to Japan and got the HKS 16 row oil cooler kit which is mounted on the passenger side inner fender... only to find out that it doesn't accomodate for the series 3 xenon headlights...

I hate oil coolers!!!!!!!!!!!!!!!!!!

[Ronin 09]

Hey JAGR33, I thought the Trust mounts in the LHS (passenger) fender? Maybe just for R32.

Got me worried now. They have one that they say mounts 'horizontal mount' - does anyone know what that's about or where it is exactly? Sorry to hijack, but I want to know if there is a Trust oil cooler kit that fits with the factory BOVs

[JAGR33]

Ronin 09- yeah the kit I got was for an R33 GTR, and it was definetly mounted on the driver's side, ask Gerald he was there when I tried to fit...

Horizontal mount is underneath the radiator and the cooler faces down towards the ground, and is fed air through an air dam.... Don't know if they are practical though....

[Emre]

Jack,

So the HKS didn't clear the back of the headlights...?

Bummer man, but it will teach you not to lash out more $$$ for your headlights than a pair of turbos.

[JAGR33]

Emre- the hoses cleared the back of the headlights, was a very tight fit... The main problem encountered was where the oil cooler core sits, one of the fittings that goes into the cooler itself was in the way of the little black box bolted underneath the xenons to run the gas discharge, was a big headache!!!!

Ended up unbolting the little box underneath the headlight and relocating a little lower so it wouldn't hit the fitting...... Got there in the end!!!!!!!!!!!!

[Emre]

Hmmm....

I am trying tp picture it in my head. You shouldn't have any dramas with interference on the passanger side, whole kit resides inside the guard.

The driver's side is more of a drama, especially if you have an oil catch tank from Ben.

[JAGR33]

Emre- yes the catch can was a problem too, but where one of the fittings goes into the core itself is pretty much directly under the passenger side headlight..... Well the xenons have a little 'black box' which controls the gas discharge, this was hitting the fitting on the oil cooler core so had to relocate this little box.....

Bit hard to explain......

[Merli]

Emre: The ballast for the Xenons are located underneath the headlight assembly, so the Xenon headlights extend about 2-3cm lower than the normal ones...

[R31Nismoid]

Well... back on topic...

i think we've established that the GTR BOV's are the way to go.

Im putting them on my car as part of the build up too

[Micko]

Does anyone know if you can let the stock gtr valves breathe straight to atmo?

I upgraded my cooler & therefore couldn't put the recirc piping back in so I changed the valve. Still got the stockies so I would put them back in if I could get away with it.

[Ronin 09]

Does anyone know if you can let the stock gtr valves breathe straight to atmo?

 

I upgraded my cooler & therefore couldn't put the recirc piping back in so I changed the valve. Still got the stockies so I would put them back in if I could get away with it.

I don't see how this would be a problem in terms of boost leak (unless they have the little bleed hole like a GTS-t BOV). It should only really affect stall and mixtures.

[GunMetalR33]

How do the GTS-T bovs fare? I have blocked of the bleed hole as well...

[Leewah]

Leewah GTR = 617rwkw (593 awkw) and stock GTR BOVs

Ice Supra = 574 rwkw and stock GTR BOVs

RPM GTR = 489 awkw and stock GTR BOVs

I think they speak for themselves.