BOV position

[doridori32]

Promotion you moron, like i stated before.

[C_DawG]

Promotion you moron, like i stated before.

Yeah, Im sure they flashed the engine bay to anyone who wanted to see it. :wassup:

[doridori32]

Yeah, Im sure they flashed the engine bay to anyone who wanted to see it.   :wassup:

Your stupid..

so i am lieng i have never had a fault at 26psi on the track in my car.. which had NO bov.

??

[R33vit]

OMG

I thought you said you where over it

ROFLMAO

Ask you friend to try p1ssing in the wind and see which way the stream flows

[C_DawG]

Your stupid..

so i am lieng i have never had a fault at 26psi on the track  in my car.. which had NO bov.

??

[Roy]

I think you may be thinking of the CAMS regulated Pop Off Valve, basically an attempt to stop them running more boost then the regs allowed. It wasnt a BOV

And doridori32, im not picking on you, just a discussion, so not wanting this to turn into a sh1t fight, just sharing thoughts, somewhere in here is an answer:)

But dont believe that the Sierras ran that sort of boost. In qualifying, they ran whatever would last 3-5 laps. In the races did you ever notice at Bathurst the Sierra challenge always fell over when they were not able to build a lead early in the race.

Thats because if they were forced to run healthy boost to catch the leaders or race for position they failed. How many B&H, Peter Jackson Shell, Caltex Sierras crapped themselve s at Bathrust, hell during the sprint rounds. basically once they got a lead or were setting a comfortabel pace they would wind back the boost level they were running to conserve the turbo and engien and also aid fuel economy, very important in a 1000km endurance race

So not saying your argument regarding BOVs is wrong, but using the old Grp A Sierras as an example is perhaps flawed. And Bathurst isnt a 24hr race, it would have been 8 hrs tops.

And an interesting side note, the GT1 Porsche you referred to that apparantly doesnt run BOVs and won Le Mans. Well i dont know for sure that they didnt run BOVs, so lets just say they didnt. Would you believe me if i told you they only were homologated to run 1.1bar. Even with a 36.6mm restrictor that was still enough to make approx 590hp

[doridori32]

I think you may be thinking of the CAMS regulated Pop Off Valve, basically an attempt to stop them running more boost then the regs allowed. It wasnt a BOV

And doridori32, im not picking on you, just a discussion, so not wanting this to turn into a sh1t fight, just sharing thoughts, somewhere in here is an answer:)

But dont believe that the Sierras ran that sort of boost. In qualifying, they ran whatever would last 3-5 laps. In the races did you ever notice at Bathurst the Sierra challenge always fell over when they were not able to build a lead early in the race.

Thats because if they were forced to run healthy boost to catch the leaders or race for position they failed. How many B&H, Peter Jackson Shell, Caltex Sierras crapped themselve s at Bathrust, hell during the sprint rounds.  basically once they got a lead or were setting a comfortabel pace they would wind back the boost level they were running to conserve the turbo and engien and also aid fuel economy, very important in a 1000km endurance race

So not saying your argument regarding BOVs is wrong, but using the old Grp A Sierras as an example is perhaps flawed. And Bathurst isnt a 24hr race, it would have been 8 hrs tops.

And an interesting side note, the GT1 Porsche you referred to that apparantly doesnt run BOVs and won Le Mans.  Well i dont know for sure that they didnt run BOVs, so lets just say they didnt. Would you believe me if i told you they only were homologated to run 1.1bar. Even with a 36.6mm restrictor that was still enough to make approx 590hp

I am not shit fighting too, just sharing

About the GT1 yeh i believe you...

[doridori32]

Hey Roy,

Since your with the BOV's ( which are bullcrap ) how long will a T04S last DAILY driven on 26psi with no BOV ??

Give me your thoughts, since you dont have facts

did you pass thermo dynamics or strength of materials classes or even engineering design, I highly doubt it :wassup:

Your arguments are based on nothig but your own opinion just like all BOV marketing crap, 2buk thoughts for a 2buk product Wink

Inertial loads and resistance offered via a non positive displacement compressor are of such a small order that you cant even break off a piece of silicone rubber in an inlet track pre throttle let alone an aluminium compressor wheel or bend a 0.225" steel shaft !

[R31Nismoid]

If your having problems with BOV's just remove it, They dont do anything.

Petar.

do you know what your talking about?

seen a few posts in the past few days that would strongly suggest otherwise.

[doridori32]

do you know what your talking about?

seen a few posts in the past few days that would strongly suggest otherwise.

Please, your making me laugh.. show me some facts why he needs a BOV.

[Roy]

Hey Roy,

Since your with the BOV's ( which are bullcrap ) how long will a T04S last DAILY driven on 26psi with no BOV ??

Give me your thoughts, since you dont have facts

did you  pass thermo dynamics or strength of materials classes or even engineering design, I highly doubt it  :wassup:  

Your  arguments are based on nothig but your own opinion just like all BOV marketing crap, 2buk thoughts for a 2buk product Wink

Inertial loads and resistance offered via a non positive displacement compressor are of such a small order that you cant even break off a piece of silicone rubber in an inlet track pre throttle let alone an aluminium compressor wheel or bend a 0.225" steel shaft !

LOL...so what are your facts:confused:

You cannot seriosuly answer how long a TO4S would last, 270 or 360degree bearings, what sort of oil temps and oil pressure ?!?!?! So many variables.

I suggest a plain bearing turbo will not last as long as a ball bearing turbo. And i would suggest a plain bearing T04S turbo would last 50,000-75,000kms on a street car at around 26psi. Try and do week in week out track work with it and id say you would be lucky to see 10,000kms of strict track work

LOL..uni, those were the days, I would be twice the post whore if i was back in uni. Have you passed those subjects, you refer to having to talk to your engineer friend...did he pass them:)

You missed my point regarding turbo failure, its the axial loads on the bearings when the shaft trys to float depending on rpm/boost etc that will cause the turbo to fail. You arent going to bend a shaft or a wheel.

Your right i offer thoughts based on my understanding of turbos and a few examples of cars that i know of. You seem to be taking the "my car runs 26psi" backed up by fanciful claims of Grp A and LeMans cars:(

Are you able to post up the Aurtonic data, what are some of the details of the car you say runs 26psi reliably

[R31Nismoid]

Who's the fool who the smart ones are laughing at?

Does this mean everyone here is a fool ???

http://ausrotary.dntinternet.com/forums/vi...der=asc&start=0

NO IT DOESNT.

BOV's are just a market strategy, and mostly used for promotion.

At the end of the day i think it comes down to what you like the sound of.

There's never been any hard proof of BOV effectivness by any of the BOV manufacturers in regards to "protecting your turbo".

In response to the "cars come out factory with BOV's now, they must be there for a purpose" call, they are there for new and more stringent emissions & noise reduction laws-plain and simple, they are another form of muffler. Can you imagine a 40+ year old taking the latest SAAB turbo for a test drive and fluttering out of the dealership. Unlike us he wouldn't have a clue what that noise would be and that doesn't amount to good sales figures.

A mate of mine who owned an S13 ran 16psi on a standard turbo (aftermarket cooler) for over 4 years. This things flutter was awesome, loud and long. We pulled it off to fit his upgrade and the thing was immac-no play what so ever, seals perfect.

They dont open fully when your loaded up with revs and flat shifting so where's their effectivness then? You only get that long drawn out pssht when your lazy shifting.

Personally i think BOV's are just another marketing ploy.

If anyone can prove they work, tell the 16 x LeMans 24hr winning engineers at Porsche.

24hr track car, twin KKK K27 turbo's-no BOV"s!  

Here's the video of the car-well worth the 12mb, a must in any car buffs video collection. Tiff Needle doing what he does best!

The turbo flutter is nuts -

http://www.lad.lv/~martini/porsche/Videos/...Porsche_GT1.asf

now now now... tell the whole story... do they rebuild the turbos after each race?

Just like they did with the cozzies after a race???

dont tell half the story, tell the full story and explain it

[doridori32]

LOL...so what are your facts:confused:  

You cannot seriosuly answer how long a TO4S would last, 270 or 360degree bearings, what sort of oil temps and oil pressure ?!?!?! So many variables.  

I suggest a plain bearing turbo will not last as long as a ball bearing turbo. And i would suggest a plain bearing T04S turbo would last 50,000-75,000kms on a street car at around 26psi. Try and do week in week out track work with it and id say you would be lucky to see 10,000kms of strict track work

LOL..uni, those were the days, I would be twice the post whore if i was back in uni. Have you passed those subjects, you refer to having to talk to your engineer friend...did he pass them:)

You missed my point regarding turbo failure, its the axial loads on the bearings when the shaft trys to float depending on rpm/boost etc that will cause the turbo to fail. You arent going to bend a shaft or a wheel.

Your right i offer thoughts based on my understanding of turbos and a few examples of cars that i know of.  You seem to be taking the "my car runs 26psi" backed up by fanciful claims of Grp A and LeMans cars:(  

Are you able to post up the Aurtonic data, what are some of the details of the car you say runs 26psi reliably

I cannot honestly be botherd anymore... my facts are correct. And i dont give if you plan to run a BOV or not, I was just trying to tell him you dont need to run a BOV because it WILL BLOODY NOT save turbo life.

Roy ill drop you a PM with some specs and datalogs

Cheers

[pnblight]

Yeh mate thats the THEORY, where is the prac like everyone else has to prove they dont do anything.

RACE CARS DONT USE BOV's!

FACTORY CARS DO FOR EMMISIONS!!!

I wouldnt block a BOV, thats just useless, pull it out or get a Greddy Type S!

Cheers

so tell me mate why the cosworth cart champ car used a f.....g hugh one direct on the plenum or doesnt that classify as a race motor or do they put them on for kicks and a cool sound you d..k

[pnblight]

or heres another one the Lancia Delta s4 does that qualify as a race car mmmm

[pnblight]

or sorry the porsche of porsches 959 anyine who knows porsches know these were the best of the best when they came out and YES THEY HAD BOV FUNNY THAT

[Roy]

Ah actually, i think you may be confusing the pop off valve and a BOV. The valve you refer to sits in the manifold which stops teams running illegal levels of boost by bleeding of pressure above a certain setpoint.

I could be wrong, but thats always what i thought that valve was

[R33vit]

Your keep telling us you have the proof that the BOV's do nothing and challenge anyone to prove otherwise.

You Sir have not yet shown any proof to the contrary.

Posting VDO's and links to other (which is you again telling it how it is)forums does not prove squat.

Post your proof here and make us all look stupid, at the moment your talking through your (for the lack of a better term) :shake: ...

[Roy]

For what its worth when i get my car back on the road ill plumb up a pressure sensor in my inlet pipes so i can use my data logger to reference throttle position , rpm and boost.Im betting without the BOV you will see pressure spikes in the piping:)

[pnblight]

Ah actually, i think you may be confusing the pop off valve and a BOV. The valve you refer to sits in the manifold which stops teams running illegal levels of boost by bleeding of pressure above a certain setpoint.

I could be wrong, but thats always what i thought that valve was

no i'm not mistaken but you are right if you want to use that terminlogy but it was call a blow off valve and stop any spiking of boost pressure the same as the WINFIELD GTR ran so these cars could never have boost pikes like you would get with totaly enclosed system .And would bet a pretty penny that the leman had the same system.