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I've got a weird looking BOV on my R33 GTS-T. It's got a Mitsubishi symbol on it, and it's model number is K5T09. I've attached a pic.

I'm just wondering if anyone knows anything about this type of BOV. Namely whether they are adjustable? I cant see any way to do it, but someone else may know something I dont?

I'm getting a huge amount of flutter, even when on relatively low boost (11-12psi). It seems that its only when I get full boost (15psi) and back off that I get a proper vent, and even then it flutters after some pressure is vented. It's venting back into the intake. Is this 'plumbed back?' If so, should I be getting extremely loud fluttering?

Excuse my ignorance, I dont know that much about the bastard things :D

Any help would be appreciated.

post-23673-1150717030.jpg

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Yeah mine is stock and has the Mitsubishi sign on it, don't worry your not special nor do you have a freak BOV.

Just a plain ol stocky

EDIT: Looks like there is a plate there also which is blocking off the air from "returning" so thats where your flutter is coming from, take that plat off the middle and re-attach it and you will find you have no flutter at all.

Edited by MADGT4

Interesting..I didnt think it could possibly be stock. A mitsu part on the top of a nissan engine!! :D

I know this stuff happens often, but it's fairly prominent aye! hehe

Thanks for your input guys.

Does yours flutter at all? how much boost are you guys running?

alot of car manufacturers use other manufacturers parts. on my mate's my01 rex, he has nissan window switches/relays.

its a usual thing.. i heard holden used a whole nissan engine :D

Hahahhahaaa Love it! =)

I found an interesting thread on SDU about modifying the factory BOV to stop boost leak: http://forums.skylinesdownunder.co.nz/show...=&postid=191358

I think I may have solved why my turbo wont flow any more than 15psi when its capable of 18-19!

if you have a FMIC and do that mod to your stock bov, it will flutter and not blow off as it should..

here is my response..

unbolt the bov from that adapter under it and bolt the bov directly on to the spot on your car.

There should also be a thin gasket between the bov and plate where you bolt it to the intercooler pipe (near the throttle body) on your car.

When you separate the bov from that adapter in that pic, take a look at the bottom of it.. there should be a small hole next to the big one.

Make sure it is “NOT” blocked.

Once you bolt it back on your car, connect the vacuum hose on top on that little nipple, connect the large hose to the front of the bov and tighten your clamps.

Should all be good now and no more flutter.

You’ll find your car will run smoother now too.

Ok, i've unbolted the BOV from the intake, and there is a thin gasket, plus a thicker metal plate that completely blocks the bottom of the BOV off from the intake! Is this normal?

BTW, that pic at the top isnt actually a pic of my BOV.. It's just one i found on the web. Mine doesnt actually have that thick adapter at the bottom, but it does have a thinner metal plate that blocks the bottom of the BOV as stated above...

if you have a FMIC and do that mod to your stock bov, it will flutter and not blow off as it should..

here is my response..

unbolt the bov from that adapter under it and bolt the bov directly on to the spot on your car.

There should also be a thin gasket between the bov and plate where you bolt it to the intercooler pipe (near the throttle body) on your car.

When you separate the bov from that adapter in that pic, take a look at the bottom of it.. there should be a small hole next to the big one.

Make sure it is “NOT” blocked.

Once you bolt it back on your car, connect the vacuum hose on top on that little nipple, connect the large hose to the front of the bov and tighten your clamps.

Should all be good now and no more flutter.

You’ll find your car will run smoother now too.

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