Jump to content
SAU Community

Recommended Posts

well guys, ive purchased a pair of gtr bovs and the assembly and was going to put them on my s14, just a few questions

why is there 2 on a gtr?

wat is the little 2mm or so hole that vents to atmophere in the side of the bov?

will i still get that cool "chooo" sound if i only use one? (blumbed back of corse) because fitting 2 in my engine bay might be abit harder than i thought it was going to be

also what do they bovs sound like when they vent to atmosphere?

thankx guys, any help appriciated :D

Link to comment
https://www.sau.com.au/forums/topic/97840-1-or-2-gtr-bovs/
Share on other sites

2 bovs as there are two inlets, two afms, two turbochargers

each has its own recirclation valve and airflow meter reading so you need two

Nah, its actually one pipe, nothing to do with 2 turbos/afm's. Leewah/nige/ben all use big single's remember :D

If you look the stock crossover pipe thing they two BOV's join into the one hose.

well, thats what i thought from briefly looking @ my two im using on my next project :(

Link to comment
https://www.sau.com.au/forums/topic/97840-1-or-2-gtr-bovs/#findComment-1776794
Share on other sites

I dont own a gtr but i think after the bovs come together that pipe splits into 2 again and one comes in infront of one turbo and the other the other turbo right?

i recon using one would be fine aslong as you have a splitter at the end so equal air is put back infront of each turbo, also only having one means only 1 vacuum line, so one of the existing lines would have to be blocked off

Link to comment
https://www.sau.com.au/forums/topic/97840-1-or-2-gtr-bovs/#findComment-1777368
Share on other sites

well guys, ive purchased a pair of gtr bovs and the assembly and was going to put them on my s14, just a few questions

why is there 2 on a gtr?

Flow area - you could achieve the same effect by having a single larger one with the same flow

area as the two added together, but there are probably good reasons why Nissan went

with two smaller ones rather than one larger one that I'd hesitate to guess at. If you've got

the whole assembly you'll see that they join back to a single recirc pipe which then splits

back into two under the stock airbox and rejoins basically just before the inlet side of

the turbos.

wat is the little 2mm or so hole that vents to atmophere in the side of the bov?

no idea; having not pulled one apart I'd assume it's to permit air equalisation between the

atmosphere and the bit 'between the diaphragm and the valve itself'...

will i still get that cool "chooo" sound if i only use one? (blumbed back of corse) because fitting 2 in my engine bay might be abit harder than i thought it was going to be

The sound's related to the volume of air and the speed it moves at - you might find that

one is louder/higher pitched than two together because the air will have to move faster

through a smaller total orifice and for longer to get rid of the same volume of air.

I've never tested the difference, so that's pure conjecture.

also what do they bovs sound like when they vent to atmosphere?

Probably very similar to any other VTA BOV. It's just air moving around, after all.

Some BOVs have funny characteristic sounds, but I doubt that the GTR ones

will... suck it and see :D

Regards,

Saliya

Link to comment
https://www.sau.com.au/forums/topic/97840-1-or-2-gtr-bovs/#findComment-1778139
Share on other sites

just a question...do you "have" to have these 2 bovs on a RB26 since its using 2 afms ?

what happens if you dont have bovs on a gtr thats using a stock ecu and stock afm's?

thanks.

You mean if you take them off or replace them with a different single recirc BOV will the

car suddenly stop working ? No. My car doesn't have the BOVs; I removed them to

put an oil cooler in. It works fine.

But BOVs are supposed to have tangible benefits; one of them being that of less turbo

wear at gearchanges due to the turbos not 'running into a solid wall of air' if that makes

sense. And you'd need a fairly large single to give the same flow area as the twins;

I don't think I've ever seen one that big. _Someone_ probably has, though :D

Regards,

Saliya

Link to comment
https://www.sau.com.au/forums/topic/97840-1-or-2-gtr-bovs/#findComment-1778169
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Ahhh, I need the whole head unit. I definitely needed to roll back through and review your setup, ha ha! Neat setup they have going on. I just need a full double din head unit. But I want good and responsive. I might have to review what the likes of pioneer have out these days.
    • Ok so after much research and talking with knowledgeable people I've got my turbo conversion done and it's all running great other than 1 small issue.  Car has remained auto with the na auto and tcm, I've used a stagea ecu with. NIstune board and everything is great other than my gear selection on the dash. It illuminates park, reverse, neutral, 3rd and 2nd. But nothing drive or what gear your in when you pop it into tiptronic.  I'm sure there is may e 1 wire in the ecu plug I need to move to rectify this. Dose anyone here have any ideas?   Cheers guys
    • Sorry I haven't been following all the detail, so you may have tried this. Does it idle with the tiniest bit of throttle you can add? You've mentioned the IACV, does it have an AAC valve and have you adjusted it at all (ie, screw the idle adjust screw all the way in, then back it out a couple of turns until idle is stable)?
    • My bad, I unplugged the one underlined in red instead of yellow before. With the car started, after unplugging the IACV (the one underlined in yellow), it idled at around 400/500 for 3 seconds before stalling. Attempting to start the car without the IACV will not start the car.   It does stutter and sputter for around 5 seconds before dying. However, immediately after starting it, you can already hear some slight sputters from the exhaust.   It won't start with the AFM unplugged. If it is when the car has already started, it stalls in a few seconds.   Yesterday, I did take some logs using Nistune of 3 scenarios. Car idling till it stalls Car idling and unplugging the IACV Car idling and removing the AFM I also have some previous logs of when the Car is idling till it stalls and when driving and it cuts. I am not really knowledgeable enough to understand what to look for. After every test, car idles rougher and rougher, until I have to stop. It will be fine the day after.
    • There is no difference between a 17x8 and an 18x8. The total diameter of the tyre needs to remain +/- the same (so you don't mess up the gearing, speedo reading, and clearance when turning front wheels..... so you just need to use a lower profile tyre on th 18 than you do on the 17. /rocket surgery.
×
×
  • Create New...