Gtr Bov Question

[3LGODZILA]

i bought some gtr bov's from an r32 that was getting wrecked, the car was standard and the bov's were still mounted on that piece of pipe.

so, when removing them they had the standard gasket, then in between the bov and the normal gasket they both had metal shims/gaskets that reduced the size by quite alot, just wondering if this is standard? i tried searching and havn't found 1 person mention it. when running high boost wouldn't this be an upgrade to remove these 'shims' to allow more air to go through? im just surprised no one has mentioned them before, unless the'yre not standard.

also another thing, my car sometimes stalls (in heavy traffic for example cruising at 3000rpm then letting go of the accelerator and clutching in while going on the brakes) with the gtr bov - with just the normal gasket, so i tried using one of the shims and surprisingly the car runs a shitload better, it hasnt stalled once, but it is fluttering even at 5psi, not as much as when i was running no bov but.

now i dont wanna start another 'doez flutterz kill my turbo yo' thread. but ive already blown 1 turbo so im not a fan of flutter, now running the shim wouldn't be as bad as running no bov would it? i mean it still flutters but its not like ALL the air is going back through to pod some is still venting through the bov, ill be running around 18psi from a highflow once i get it tuned.

btw heres some pics

[KiwiRS4T]

i haven't seen those shims. I had a GTR bov on my RB25DET running 1 bar making 245awkw with no problems.

[DVS JEZ]

Was it ur rear turbo that popped. Was it a stock turbo? They are prone to breaking the exhaust wheel off or siezing. They get extremely hot and detonation shatters the ceramic turbine off.

I dont think flutterz killed ur turbo. Especially with stock bov's.

[JoelyMoley]

They probably changed the hole size to change the sound of the blowoff to something higher pitched?

[lachlanw]

lol funny . what a waste of time ?

is the recirc pipe al lhooked up ? do your airflow meters still have mesh ?

[Hanaldo]

Don't mean to hijack your thread dude, but I tried to fit my GTR bov today and I'm not sure what to use to join the bov outlet to the recirculation pipe? The outlet on the stock bov is tiny so the pipe doesn't fit on the GTR bov. Tried using a piece of radiator hose, but if it is big enough to fit over the GTR bov outlet then it is too big to fit on the recirculation pipe? How did those of you with GTR bov's connect them to the recirculation pipe?

Just to provide something on topic to the thread so I'm not completely hijacking it, my bov's did not have those shims. So I think it is going to be something the previous owner has fitted. What you might find is that because GTR bov's leak at idle, your bov's may have a very loose spring which is causing it to leak too much. So the owner fitted those shims to reduce the pressure on the spring so that it doesn't leak so much. Just a theory anyway

[3LGODZILA]

lol funny . what a waste of time ?

is the recirc pipe al lhooked up ? do your airflow meters still have mesh ?

wats a waste of time? it took about 2 minutes to take off the bov and stick the shim in.

to the others i 4got to mention its on an r33 gtst not a gtr

hanaldo - im not too sure how u would do it on a standard setup as ive got a metal intake pipe and the fitting is in a different spot so i ended up chopping and modding the standard bov hard piping and used some aftermarket silicone hose which is pretty flexable and even then i had to really to the clamp on tight where its on the hard pipe and it juuuuuuust stretched over the bov outlet - its a big bastard lol. but maybe give this ago - get some pipe about 30mm long (atleast a few mm thick so that its not gonna bend easy) that can fit snug inside the recirc hose, also shorten the recirc hose a bit, then get a little length of aftermarket silicone hose (maybe 100mm long) and clamp it around the recirc hose (the metal pipe inside so it doesnt squash it and so u can also make it tight) and stretch the other end over the bov

so i guess the shims aren't standard, might drill the hole out a few mm so it doesnt flutter as much see if does anything.

[Basti]

wats a waste of time? it took about 2 minutes to take off the bov and stick the shim in.

to the others i 4got to mention its on an r33 gtst not a gtr

hanaldo - im not too sure how u would do it on a standard setup as ive got a metal intake pipe and the fitting is in a different spot so i ended up chopping and modding the standard bov hard piping and used some aftermarket silicone hose which is pretty flexable and even then i had to really to the clamp on tight where its on the hard pipe and it juuuuuuust stretched over the bov outlet - its a big bastard lol. but maybe give this ago - get some pipe about 30mm long (atleast a few mm thick so that its not gonna bend easy) that can fit snug inside the recirc hose, also shorten the recirc hose a bit, then get a little length of aftermarket silicone hose (maybe 100mm long) and clamp it around the recirc hose (the metal pipe inside so it doesnt squash it and so u can also make it tight) and stretch the other end over the bov

so i guess the shims aren't standard, might drill the hole out a few mm so it doesnt flutter as much see if does anything.

i see where you are getting at with the pipe inside another pipe thing, but i tried it on mine, and the pipes vibrate when just making positive boost (stock gauge) and make a honking noise. havent gotten round to a more permanent solution yet

[Hanaldo]

Thanks for the advice man, might see if I can sort something out like that. My recirculation pipe is metal though, so I can't shorten it or anything... I have a rubber pipe connecting the bov to the metal recirc pipe? Anyway, will see if I can fabricate something to make it work.

[3LGODZILA]

did u just clamp a hose onto another hose? thats where i was getting at with cutting a short length of metal pipe and putting it inside the hose so when u clamp the new hose over it doesnt keep squashing it. im guessing the vibrating is from the inside diameter being too small? i duno im no expert but try searching 'gtr bov' i know i read a few threads where ppl say theirs makes a honking/farting noise but with mine it sounds near on identical to the stock rb25 one

[3LGODZILA]

Thanks for the advice man, might see if I can sort something out like that. My recirculation pipe is metal though, so I can't shorten it or anything... I have a rubber pipe connecting the bov to the metal recirc pipe? Anyway, will see if I can fabricate something to make it work.

yeah i meant the hose that goes on the bov not the hard piping, there should be enough hose there to play with if i remember correctly - did mine ages ago ey

[Don Dada]

I saw these metal "gaskets" used before on a gtr also but the holes were way smaller...just a few mm

The car did have hks metal piping with atmo bovs and a tuned ecu tho....

not sure what holes that small will actually do......