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Pros & Cons Of Not Running A Bov

.WILKO.

By .WILKO.,
in Engines & Forced Induction

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aerofocker Enthusiast

aerofocker

Posted
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my opinion is that people shouldnt make any claims unless they have documented factual proof,they should be a clear and concise,heresay and "what my mate has" should be left out of it, people search forums like this for the correct answer but unfortunately everybody has different views,you could read this thread end to end and still come to no prooven conclusion, imo vta blow off valves lead to poor idle and stalling issues,the factory recirc wins for me,nissan clearly know more than us lot,any extra stress on a turbo is best avoided- fact. stress is increeced on a turbo when the throttle is closed and the turbo continues to wind and if it does slow it has to be re spooled again ,correct my spelling if you want,noisy bovs are for boy racers imo

Edited by aerofocker
darkhalf Community Regular

darkhalf

Posted
Posted

Another note - if you do use a BOV make sure you pipe it so that it goes into the turbo and none of the air feeds back into the AFM otherwise you will get overfueling and potentially stalling when going off boost

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Most diesels don't have throttle butterflies either, maybe I should rip that out of mine too...

I have never heard any truck making that gay dose noise so there must be some sort of pressure release?

The VL turbo and XR6t's came with no bov from factory didn't they? All the ones around my place anyway. :(

**RB2530** Proficient

**RB2530**

Posted
Posted
I don't see trucks running BOVs :down:

Diesels do not actually use a throttle body to control engine rpm...

Most diesels don't have throttle butterflies either, maybe I should rip that out of mine too...

I have never heard any truck making that gay dose noise so there must be some sort of pressure release?

The VL turbo and XR6t's came with no bov from factory didn't they? All the ones around my place anyway. :P

I have only seen 2 XR6t's under the hood and they both had Bosch CBVs fitted...They were stock standard and on display at different motor shows...

As far as the VL turbo is concerned they are a getting quite old now....My first car (Mk1 escort) did not have EFI...does that mean I should fit carbies to my GTSt??

Also, since when do we use Holden as a bench mark for design??

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted
I can not run a stock bov as the after market plenum does away with the stock bov and the traction controll unit.
You can stick the stock bov on the hot side of the i/c - much easier to plumb back that way.
Mr. Untouchable Experienced

Mr. Untouchable

Posted
Posted

Its not all that hard to fit factory recirculating BOV's into custom piping. I recently mounted factory GTR Bovs in my car. I've used the bovs, the mounting section and the factory 'Y' peice to make things more simple and easy. Not exactly pretty but it works, and well.

I welded a piece of 2.5" pipe into the 2.5" hot pipe just before the cooler, which mounts the BOV's just under the factory airbox location (FRH skirt section). Off them I run dual 36mm hi temp silicone hose back up the the factory GTR 'y' section which then exits into single 2" , which is connected to the 2" pipe now mounted (welded) into my intake pipe.

they work really well, no reversion, very little noise and 'like factory' performance.

sorry the pics a pretty kinda shithouse...

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  • 4 weeks later...
nato_wp Enthusiast

nato_wp

Posted
Posted
I don't see trucks running BOVs :D

You mustn't work on very many trucks.

All of the Diesel turbo trucks my employer uses (200-300 turbo trucks) have a pressure relief valve (BOV) built into the intake piping from factory, an essential piece of equipment to save a $15,000 engine if the wastegate fails to open under extreme operating conditions. (minimum, just for replacing the engine, not even considering downtime and labour)

Replacing a $2000 RB motor fades in comparison of expenses...so you may as well block the BOV off, and sound cool :D Plus, there is no way that the group of engineers Nissan paid salaries for knew what they were doing back in the 90's. :cool:

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