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Gtr Bov

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cars_suck Enthusiast

cars_suck

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Hey guys, i bought a GTR BOV a while back and it seems that the spring was alot softer than the stock blow off valve... just wondering if this is normal??

i put it on my car and ofcourse it leaked.. but why ? i never thought springs could get that soft?

anyone know or have one that can explain this?

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R31Nismoid Grand Master

R31Nismoid

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I don't remember mine being soft enough to press with relative ease to be honest.

Been 4 years now but i remember i couldnt press with my thumb, then i didnt try super hard but medium pressure didn't budge

Is the VAC line connected and not leaking?

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cars_suck Enthusiast

cars_suck

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ok sweet, because i can press it in easier than i can the stock gtst valve and i thought that was weired.. and it is open at idol but as long as your saying this is normal? and it will seal when there is boost and not leak?

and does this mean my engine has good vacume??

cheers guys, i know im a noob but i know bov's arent sposed to leak :D

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cars_suck Enthusiast

cars_suck

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I don't remember mine being soft enough to press with relative ease to be honest.

Been 4 years now but i remember i couldnt press with my thumb, then i didnt try super hard but medium pressure didn't budge

Is the VAC line connected and not leaking?

the VAC line is connected properly and not leaking.. but mine is soft enough to press in with relative ease.. easier than stock gtst valve anyway.

Mine is soft and works fine....

plumped back or not?

are you trying to vent to atmo or plumb back?

i dont have it plumped back at the moment.. should i plum it back??

They are quite soft by design as they are intended to be used as plumbed-back.

On an engine with good vacuum, they will be open at idle and cruise.

cheers

Does this mean i have to have it plumed back? or will it still work fine vented to atmo?

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TTT Grand Master

TTT

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Only way to run them venting to atmo is if you have acar with no AFM.

and even then, they will need some sort of one way valve/filter on the end of them.

so on your car, yes.

PLUMB BACK ONLY.

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cars_suck Enthusiast

cars_suck

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ok will do :)

i still dont quite understand however why it cant be run vented to atmo if it still leaks at idle when plumbed back anyway? no matter what your still loosing air..? as long as the valve is sealed when on boost why should it matter if its plumbed back or not?

confusing...

thanks anyways guys :D

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GeeTR Grand Master

GeeTR

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Lightly leaking at idle doesn't affect the factory setup as its "leaking" back through the BOV return and being ingested after the AFM, before the turbo. As such, it doesnt get measure twice, nor get "lost" to atmo.

My old GTR BOV's are very soft. The design in principle is to soften or smoothen the boost / vacuum transition i would imagine.

Edited by GeeTR
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