DV's vs BOV

[Yuben]

Guys , I tried searching but couldn't find anything.

Just enquiring what is the difference between running a CP with upgraded DVs and running a CP with a BOV.

Thanks

 

[Iceman12596]

Sound as far as I know, I could be wrong though

 

[" N1KHAR-ZN "]

+1 on sound.
There's no difference unless your OEM parts have a leak. The upgraded Forge DVs require regular maintenance though whereas a BOV doesn't IIRC.

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[Yuben]

Sound as far as I know, I could be wrong though

Thats what I read in other forums too. Just wanted to know if there is a difference in performance.

 

[Yuben]

BOV gives off the whoosh sound that us not to everyones liking

 

[Iceman12596]

BOV gives off the whoosh sound that us not to everyones liking

How does the sound go ?

Whooosh :roflol::roflol:

 

[Yuben]

BOV gives off the whoosh sound that us not to everyones liking

How does the sound go ?

Whooosh :roflol::roflol:

That's how dem Americans describe it:crazylaugh:

 

[corp]

As far as I am aware, BOV = increased turbo lag and DV = less turbo lag. This is what I have seen on other forums. I reckon it depends on your complete setup but those are the likely results with an incorrect setup.

All depends on your needs I suppose. I look forward to seeing what the experienced will say regarding N54/N55 setups.


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[Gizmo]

BOVs are for cars that run MAP sensors to meter the amount of air going into a motor. DVs are for cars that use MAF sensors to meter the amount of air going into a motor.

 

[Yuben]

So what is the difference between running an ER chargepipe with Forge DV's and an ER chargepipe with a Tial BOV on a stock N54?

 

[Gizmo]

DVs keep the metered (intercooled) air within the intake system, BOVs vent the metered intercooled air to atmosphere which causes the ecu to over fuel.

BOV cars heat soak quicker than DV cars. BOV cars experience more turbo lag than DV cars.

 

[Gizmo]

It's in the name, Blow Off Valve needs positive pressure against it to expel the boosted air. Vacuum pressure from the intake manifold off throttle is not enough to open a BOV so thats why DVs are used. DVs will prolong turbo life and aid in keeping spool between shifts ie less turbo lag.

Supercharger kits use DVs because of the negative effects BOVs have on forced induction. It sounds cool but it's not efficient. DV development has come a long way in the last 10 years, not to mention they are used by all car manufacturers.

 

[" N1KHAR-ZN "]

Don't know if this is true in the case of the N54 engines which uses DVs and MAP sensors as standard. Switching the DVs for a BOV on this platform is extremely popular and is even recommended by some of the big name turbo companies.
//cloud.tapatalk.com/s/5950cb676b7c1/VTT BOV.pdf

 

[Kish2604]

DVs keep the metered (intercooled) air within the intake system, BOVs vent the metered intercooled air to atmosphere which causes the ecu to over fuel.

BOV cars heat soak quicker than DV cars. BOV cars experience more turbo lag than DV cars.

That's possibly fair explanation on any other car, on the N54 the BOV/DVs fit before the Tmap sensor in the charge pipe which is mounted just before the throttle body. There is a second sensor (MAP) on the top of the manifold as well.

The n54 has no MAF therefore it relies heavily on the O2 sensors to keep fuelling in check.

 

[Kish2604]

So what is the difference between running an ER chargepipe with Forge DV's and an ER chargepipe with a Tial BOV on a stock N54?

The Forge dv's is were the market was 5 years ago and BOV is where it is now... Both will perform the same for you on a stock turbo car. The trend towards BOV is partially because of sound, some people like it, others with bigger than stock turbos also suffer from compressor surge on lift of throttle which can cause catastrophic failures.

for your specific application there is very little benefit to be had.

 

[AshG108]

Ok so sorry to semi-hijack this thread. so for my understanding, I have the Hyundai IX35 2.0 CRDi...when the turbo dumps the extra air pressure, it dumps it within the turbo outlet pipe that is routed to the air box.

Now with my very limited knowledge, the other day when the car came back from a service, the airbox lid was not clipped on and left a gap. when I changed gear on the car, it had a whiplash sound effect whereby when i would previously change gear on the car, it would have just a woosh sound if the airbox is clipped on proper and closed.

So now i am guessing, that my car has a re-circulating Dump-valve, is this the correct thinking and understanding (from what i have read above)?