Asking for "proof" isn't really the subject matter here though.

If you want one- fit one.

If you don't- don't.

It's that simple! But make the decision based on the OPINIONS (as that is what they are) of more experienced members on the scene. If the clued up guys such as Harvey say it can cause problems then that is enough for me, a noise isn't worth a potentially large bill in my world but others live by different rules.

It's like asking why I don't run on the 95RON fuel, I just choose not to. It can cause issues- yes. And I would advise against it- same goes with DV's.....

 

I'm not bright enough to make sweeping statements either way; as you say there are so many variables...I just don't understand running something that has a greater potential to harm your engine without any positive benefits to offset that risk...but then I drive an estate and am not a fan of wings\scoops and all that jazz so what do i know

 

I swear they should ban dump valve threads not only on SN, but on the internet as a whole, they are so tedious and always end up the same way

 

[QUOTE=WildPikey;10580685]when vta valves have caused overfuelling it is usually such a miniscule amount that it is nothing to worry about, different altitudes, temperatures etc can all cause bigger problems than a vta valveQUOTE]

Variances for every situation you can imagine are already coovered on a standard subaru sensor setup .... air temp, atmospheric pressure are both in there and the standard maps have scalars in to suit.

the difference between stoich and lean when trying to get more than 150bhp/l out of an engine is miniscule!

If there was a performance, spool, torque advantage to running VTA on an engine with a maf, then i wouldnt be so anti them .... in that case it would be a slight potential reliability to performance compromise, so fair enough!

But the fact is there is NO advantage of a loud VTA over standard recirc ... so the only reason to buy one is vanity and maybe because theres too much money in your pocket ..... the first reason i cant do owt about other than point and laugh, the second one id be happy to help with .... my bike needs new brake pads and im skint!

 

I suppose I just want some proof, I have seen proof of one with a vta that is running fine and has been for over 10 years on track and road, hell he even puts Crap fuel in it when he is skint and still doesn't get problems lol, maybe he is just very lucky but I just don't see how you can condemn all because of one if you see what I mean, everybody keeps telling me it's fact because of what they have been told not because of what they have experienced first hand, how can it be a fact, it can't can it? Not unless somebody has tested every single impreza with every single vta valve, I do have a hks vta on my car and it's absolutely fine, I have had my map tweaked though to suit, how does anybody know the op wasn't planning on doing the same?

 

[QUOTE=legacy_gtb;10580713]In that case, so what? It's not your car so why care so much? I personally don't like the sound of my vta but the car is mapped with it and runs fine so am happy, the op didn't ask about advantages or disadvantages he just asked which is the loudest, I am merely questioning the so called facts that keep popping up lol

 

So £100 on a loud dumpvalve, then another £couple hundy ish on a map tweak .... all just make a big noise every gearchange..... my personal opinion is this makes you a bit of a spoon!

 

Your a spoon because your making assumptions, would it not of been wiser to ask if I only had a map tweak for a vta? I didn't have my map tweaked just for the dump valve, I wouldn't of fitted a vta but had to at the time and now have it mapped to suit so it stays.

 

Funny how all the haters when questioned about the truth behind their bold statements about vta valves causing damage etc all revert back to the fact that it's just down to personal preference! It's like you want to justify calling someone a name? Your a **** for buying a red car when I like silver sort of thing.

 

[QUOTE=WildPikey;10580729]Your absolutely right .... it isnt my car and i dont give a **** what he does with it!

but as mentioned before, the ins and outs of VTA dump valves has been done to death in about one thread every month since the birth of scoobynet, and by highlighting the fact that he should be looking at "why" he wants one, might make him see sense and realise that there are much better things to throw your money at than a trev valve.

Maybe the VTA haters that get really vocal on the point have realised that sweeping negative statements are the only way to get theyre point across to someone that blindly wants to make noise with no reason why!

My personal reasons for hating them are based on an impreza i bought as a runaround and basis for future project ..... pulling the running issues out of that was a ballache .... and they were all caused by a VTA!

 

haha ... you right, i made assumptions .... none of which were pointed at you so settle pettle!

"my mate has a classic STI and is looking for a loud BOV ..i know some may disagree but i was wondering which gives a lous clean sound ??" - opening thread

My assumptions are this fellas bought a classic standard or lightly modified imp (i.e. still running a maf), has started looking at modifying, seen VTA's are fairly cheap, believed the marketting hipe of increasing spool etc etc etc, and wants the trev noise .... in which case the op asking this question could have had a load of fellow trevs pointing him down the road of a part that could potentially cause him issues and break his car .... or the poeple in the know make him aware of the problems so hes aware of the potential pitfalls of his decsion, hopefully he realises theyre a waste of time and that just saved him a chunk of cash.

Anyway, **** it .... this is getting boring .... im out!

 

If were going into what makes you look a chav, then slapping tones of decals all over your motor for me would be top of the list. Add's no power, makes you look a fool, you in a road car not a rally car. Anyone that buys a subaru likes attention, if not they buy a saab etc

 

wildpikey - your efforts are wasted, i had this similar argument the other week with alcazar, again i asked for solid evidence to show engine failures due to a VTA valve, no one provided any.

my question is, if a car is fitted with one and the map checked and tweaked accordingly then why is it any less safe then a standard one? surely a standard one could malfunction or stick like any aftermarket one?

 

https://www.scoobynet.com/scoobynet-...ump-valve.html

 

This is going on bit and it's my fault so sorry lol, Think I will just give up as it's obviously written in the scooby bible somewhere that all vta dump valves must be eliminated or something, if people have got fed up with trying to force not entirely true information on people then that's not my fault, let me know if your ever down this way and I'll prove to you what I am saying.

 

There probably is no evidence, I will accept the fact that some vta valves, especially bailey have been known to cause problems but these people just for some reason cannot handle the fact that others on some imprezas are absolutely fine.

 

Barnshaw its entirely up to you what you do with your car but if you ask a question on a public forum you have to man up and deal with the replies...even if its not what you want to hear

I think the comment about shouting "look at me" out of the window whenever you change gear is pretty darn funny as its tinged with truth

 

I have absolutely no problems whatsoever taking on board peoples replies, providing they are backed up with supporting evidence.

 

That's the issue, you need neither evidence nor even the semblance of truth to post on here...just an opinion or inclination to, hence my comment about maning up

 

Ok let's forget wheather or not they cause running issues (they can by the way) and focus on why somebody would want one, and why they would want an extra loud one.

- what are the performance benifits from running a VTA ?

- are these benefits increased by using certain brands of VTA ?

 

MattyB .... nail .... head!

Bang on that man! ... my

- what are the performance benifits from running a VTA ?

Sweet F.A.

- are these benefits increased by using certain brands of VTA ?

NO

If anyone can reply to these two questions with different answers then theyre either full of **** or ill be eating my hat!

 

no one is questioning peformance benefits, but if someone wants to fit one (even if it is just for the noise) thats the persons personal decision, but does this automatically mean engine failure? why cant it be mapped safe?

Again no one is questioning the brands, i am sure you can get brands which are lesser quality (baileys which everyone mentions) but then you have forge, HKS etc, surely its the same, you get what you pay for.

interesting thought though, how many people have had engine problems or fails from fitting an HKS SSQV?? answer me that?

 

Ok ... fortunately ive never experienced an engine failure, but i did have irratic idle, the car wouldnt catch falling revs, a backfire from excessive unmetered fuel blew the manifold to turbo gasket, and then the fuelling got irratic jumping from rich to lean as standard scoobs only have narrow band lambda sensors to monitor fuelling rather than control it as such.

irratic fuelling, mixed with a heavy right foot at the wrong time WILL cause engine failure! I was lucky and avoided it by eventually finding a standard recirc!

 

so was the unit mapped for the car? or just fitted without mapping?

if so was the unit faulty?

and if the unit was not faulty surely mapping could have fixed the fuelling?

 

Barnshaw,
Answer me this..

- what are the gains from fitting a VTA ?
HKS charge well over £200 for theirs so SURELY they must do something other than make a fancy noise.

 

i am not disputing there are no gains! but the reason why people buy them whether it be for the noise or whatever is entirely their choice.

people spend hundreds plastering their car in vinyl, or fitting tints, or fitting better speakers, none of them improve your performance.

the fact is again there is still no proof, what about all those other people in the other thread i posted running VTA's, Jura, Brownpants etc, are their engines all running dangerously rich, overfuelling and engines about to implode?

 

If a person likes something they have done/bought then in their eyes they have gained something, it's as simple as that, MattyB1983 I read your not running one, that can cause premature turbo failure so surely vta or recirc is better than none at all leaving very little reason for you to comment other than personal opinion?

 

I've got an idea for all of you wanting that 'pppssssssstttttttt' noise but are concerned about issues after reading this thread.

Buy this -
http://www.ebay.co.uk/itm/280861381516?redirect=mobile

And while your on eBay and obviously in the mood for buying pointless mods (you must have more money than sense) get yourself one of these -

http://www.ebay.co.uk/itm/1305118223...#ht_5672wt_898

It'll make your treved up underpowered heap sound awesome...

 

It would be helpful to alot of people if you could let us know which make and model vta dump valve it was causing your problems?

 

wow what a weak response matt, again another thread with no evidence just word of mouths.

i ask one question -

IF a VTA is fitted, such as a HKS or FORGE and mapped properly, will this still be unsafe and cause borewash and premature engine failure like keeps being mentioned?