Pack_Scoob

Hey if you want to keep the thread going we can start hurling insults at one another.....

bugeyejohn

iTrader: (11)

I bet ewe have

pigSTi

iTrader: (5)

QFE

So why don't you guys (F1, Dunk et al) go do one and leave this thread alone.
Surely it would save you getting fed up with no-one listening to you? Why hang around when your advice is just falling on deaf ears? Do you enjoy it?

f1_fan

iTrader: (9)

It's a public forum for the airing of opinions. If you don't like what I or anyone else has to say then ignore it or deal with it. The choice is yours.

I'll just bet though that you have a stupid whoosh bang pop DV don't you? And what is really getting to you is the implicaton by some that it is somehow an indictaor of you being a bit of a ****? Your post above the one I have quoted removes any doubt though really doesn't it?

Enjoy the rest of your day

BlobEyedRex

You just wouldn't let it Lie!

pigSTi

iTrader: (5)

I haven't got a dv on my car. I'm glad you said this It's a public forum for the airing of opinions. If you don't like what I or anyone else has to say then ignore it or deal with it. The choice is yours.

So you wont be calling for anymore bans then when people air their opinions.

****

f1_fan

iTrader: (9)

Where have I called for anyone to be baned? Serious question btw.

Will

Cracking thread

f1_fan

iTrader: (9)

It's rapidly becoming a SN classic Who would have believed a chavvy dump valve could be the cause of so much fun

Will

initialD

iTrader: (2)

[quote=f1_fan;10024000]It's a public forum for the airing of opinions. If you don't like what I or anyone else has to say then ignore it or deal with it. The choice is yours.

exactly my point to you in the first place ! hypocrite

pigSTi

iTrader: (5)

hehe

f1_fan

iTrader: (9)

Looks like I am becoming one, must be the company I am keeping in here

f1_fan

iTrader: (9)

What's hypocritical about that? I am dealing with your opinion by telling you it's wrong

BlobEyedRex

The following Chav chariots all have something in common:





Big boot spoilers
Large noisy exhausts
Normally Aspirated engines, as i'm sure a chav by definition couldn't afford a turbo engine transplant

So really which guys on here are the so called Chavs again

initialD

iTrader: (2)

**** me the delta bobykit on that nova was a terrible design

BlobEyedRex

That was actually a bodykit, i thought the guy just made it up out of bits & pieces and that rear bumper is truly terrible (designer needs to be shot for that 1)
Looks like they even went to town in fitting a bonnet scoop as well

pigSTi

iTrader: (5)

There is a white classic in the background... anyone want to own up?

RS_Matt

lol, nobody knows, paradox really. Probably why there are no top notch Subaru Tuners in the UK.

scoobiesteve103

ok so ive been off here for a few days but i come back to see this one still going strong. f1 fan and the others im not having a dig and dont want to get in to a fall out with you but if you believe dv's to be so bad for the engines why not prove it with real evidence on a new thread in witch it would lay this matter to bed once and for all. after looking back at the posts i see alot of people like the noise and few dont is this an age thing? ive posted myself saying i like the sound but on a long drive it does my head in and then so will my new blitz probably but i dont think thats what its about. some on here a tune there cars to the max and others mod there cars to look better then the next car or personalise it to them but but surely its more about shareing real info that can help each other

BlobEyedRex

From what I understand of how things are working is this.

The Turbo is boosting & the Intercooler is pressurised air rushing into throttle, you go to change gear by releasing throttle engine goes into a vacuum state and so pressure in intercooler is released allowing turbo to spin down quicker which is better for it to reproduce boost again.

now that air on a recirculation setup re-enters the turbo inlet it has 2 paths it's either going
1. back towards the Maf and back out the air filter
2. towards turbo again which means it will be keeping the turbo spinning and so not helping it slow down as quickly

I also take it due to the vacuum state it will take option 2 and will hinder turbo spooling down and from a manufacturers point is also a green option in that the air in the intercooler also contains oil vapour and other nasties from both turbo and the crankcrase breathers (going into turbo inlet) so it's designed to pump that through the engine to burn and then go through the CATS. Having all that oil vapour crap (which by the way has now gone back and added to more oil vapor coming from the breathers) along with the petrol and air isn't exactly gonna produce a good clean burn in the piston from what i can see

VTA dump valve on other hand will dump that oil vapor & air to atmosphere, which in turn
1. allows turbo to spool down much quicker as no pressure being rebuilt up again on either side
2. not very green as mentioned the oily vapor crap is also being expelled
but is aiding the air now going into the engine when accellerating again by having less oil crap in it than it would have done with a recirculating setup, so allowing for a cleaner burn.

Now you could either have fitted an oil catch tank or even vent your breathers to atmosphere so above isn't then an issue, but you would still have the affect of the recirculated air hitting the turbo again and keeping it spinning faster than if the system had total depressurization

Question i still have is how do they code up the ECU to know exactly how dirty the recirculated air is as the air does not go back through the MAF it goes turbo, intercooler, throttle, manifold & engine are there other sensors?

because say you have a really high amount of oil vapor releasing this is not going to be a set constant (especially as engine gets older) then that is gonna affect air/petrol to a dangerous level in leaning the burn out or causing to become too oil rich and flashing before it should.

Although I can then understand if they are making a guess and so add extra fuel to combat this and so by dumping to atmosphere means it is running rich, but that in itself brings up more problems from what i can see

This is why I have above question, because having had my scooby on a rolling road, with my dual port BOV setup as vent to air and then later tested with it setup as closed recirculation only the power & torque readings were exactly the same.
So if venting to air is bad & causes leaning out why did the readings not get affected and the RR operator warn me engine was leaning out etc, and the outputs stay the same?

f1_fan

iTrader: (9)

Just use the search function my friend.

Here is part of my earlier post on the same subject:

BlobEyedRex

quote=f1_fan;10025146]Just use the search function my friend.

Here is part of my earlier post on the same subject:[/quote]


those threads seem to also promote deleting the bypass valve altogether which is not good for the turbo bearings from what i've read on here and no-one in the threads has scientifically tested e.g. Rolling Road before and after just a case of it felt better, so could have been a case of a faulty DV being fitted or just in their own minds they didn't like the sound or went from hear say

Going with the delete is that not Chav as well as the turbo chatter that is produced is commonly mistaken for a VTA DV. Just have a listen to the sound in the link and then look at a lot of the comments from people thinking its a VTA DV.

http://www.youtube.com/watch?v=7nNik...eature=related

At the end of the day VTA can be blamed for many things but if you also look at how far to the limit and over people are tuning their scoobies, the cases of engine damage can be down to other failing factors instead

f1_fan

iTrader: (9)

Agree with what you are saying regarding heavily tuned Scoobs, but I am talking about people who buy a standard car and the first thing they do is take off the recirc and bolt on a VTA DV.

Many of those threads contain people who have done that or simailar and have then found the car runs much better when they put the standard DV back on.

It is also like some people are in denial of the evidence before them. There was a thread on here a few months ago where a guy had put one on and his car was running very badly so he posted asking for advice. Several people told him to put the recirc back on yet he ignored their posts completely and checked a million other things.... the last thing I remember was a certain regular poster (not me btw) virtually yelling at him to put the bloody recirc back on and at least try it.... don't know if he ever did as I went away working and forgot about it

chaffe

iTrader: (1)

Ive designed and made several dumpvalves personally. I think it very much depends on spring rates and piston sizes, they have to suit the application. In all cases with cars running a metered air management system they will always fail safe on the rich side on boost if they leak or fail completely. However if they leak on part throttle (wrong spring rate/piston size) then they can cause bore wash and premature bore wear due to the engine running rich as it leaks metered air. I think it very unlikley that a dumpvalve on its own would cause instant engine failure, rough running and bad fuel economy yes.

RS_Matt

There's no oil/grease at all on my VTA trumpet. (My old RS Turbo used to badly spit oil out of the dump Valve) I think perhaps scooby re-circ is just for noise regulations.

I watched 2 Fast 2 Furious last night and the difference between VTA and Chatter noise came very very close at times as they do in real life! So those who state "chav noise" are just being condescending.

pigSTi

iTrader: (5)

It's just a case of differing tastes, yet those (or at least some) who do not find dump valves to their tastes feel the need to convert those of us that do.

My choice is re-circ, I have had dump valves, the latest one being a HKS on my blob STi last winter.

I took it off after deciding that for me, the re-circ was what I wanted.
It had been a year or so since I last owned a scoob at that point and I figure my taste must have just changed during my time away as I used to run a dv on my classics.

I know that the two differing valve types make the cars run differently yet I do not feel the need to make claims about the vta or the people who own them.

If there was solid evidence, proof that they caused permanent damage to cars then I would raise the issue when asked. Until that day comes, I say each to their own and enjoy your cars - they are yours after all. Not F1 Fans'.

initialD

iTrader: (2)

i bet after all they have said about chavs , that it belongs to chocolate brian or f1 fan

pigSTi

iTrader: (5)

hehehe

BlobEyedRex

or could it be F1 & chocolate o brian get stalked by said chav mobile
and hence the Chav hateness