ok , apologies for getting you all worried im going to leave my impreza in the hedge, i obviously wont do that, what im trying to say is that if the engine goes on a track day im not going to cry about it, i didnt pay big bucks for the car, and its not my main car so doesnt matter to me. i love imprezas hence i bought one.

 

very true , so no need to call me a wan&er!

and i agree hence my first post was "will it fit and work" ? alltho i dont want to make the car run worse, so thought id ask the question, the people who have advised on what they think it will do has actually been helpful. i just will not bother, as to risk it running worse is not what im after.

 

for what its worth i keep seeing it time and time again
use the search function

well last post i viewed were a newbie had used the search and found a old thread he got slated for resurrecting a old thread

its a loose loose situation

and why isnt there a sticky for this subject that gives all the info we the members need instead of directing them to tubby ****** or what ever his name is knowing full well he'll be a co(k to who ever posted

awaits hail of insults and loads of bollocks about grammer

also just searched dump valves and it brings this thread up but the next one is 08/09 hatches show your selves
hmmmm! thats realy going to help NOT

 

I don't dispute this, that's why most high boost cars don't use any sort of dump valve at all (rally cars are a prime example of this). However, you didn't answer my question. How does a VTA dump valve enable quicker turbo spooling compared to a recirculating one?

 

fair comment and your probably right so I apologise,
it's the "leave it in the hedge" comment that made me think the above comment.

if your going to run the car on a track the dump valve will be of no use whatsoever.

what you need to look at are the brakes that will fade very quickly when they are hot and as you said the car was in poor condition etc im assuming its quite old so the suspension will be very worn.

also id give it a good service of all fluids before tracking it.

 

agreed , lets leave it there! i want to come here again!

its in workshop as we speak, new discs and pads all round , picked up a set of 16inch wheels and tyres cheap too, engine oil,brake fluid,rear diff oil, coolant flush and refill, gearbox oil so should be a good birthday for it

suspension is not something ive thought about but ive asked for a full health check on it so hopefully he will check for leaks etc, and before anyone says i thought i was doing this on a budget i get all my oils and fluids free due to my line of work and labour is costing me £30.

 

Its not so much how new the discs etc are its if they are up to the job on track really

 

It is more efficient at controlling higher boost pressures it's not rocket science you know the more boost pressure you run the more it is going to put strain on the standard set up actuator and all,as they are not designed to control any amount of boost pressure I.e they have to work within there parameters that they were designed for.any more questions you have please use google and research turbo pressure and spool up between gear changes.for a more in depth answer.Man am I getting bored of these dump valve threads.SJ.

 

Better,would be even better if you wasn't so sarcastic

 

Ok enough!

The lad made a bit of a scooby net fopaux in asking about dump valves, and got a tad arsey, which is understandable when attacked by the brat pack.

He's wound his neck in a bit now so give the lad the benefit of the doubt and chill the **** out.

 

+1

 

+1 on that +1.

 

alright

 

Oh god, if you make me facepalm any harder I'm gonna have an exit wound on the back of my head.

You seem to think that VTA dump valves are stronger than all recirculating ones, does this mean you'd choose a bailey VTA valve over a forge recirc valve?

You realise that the pressure regulation with regards to dump valves is down to the quality of the internal seal and the strength of the spring inside them, and has nothing to do with where the air is routed to, right? Also remember that wastegate actuators and boost solenoids are not dump valves, so you mentioning there weaknesses does not justify your early comment stating that VTA dump valves are stronger than recirc ones.

Now please, try again, and try harder this time. I asked you how VTA dump valves allow for quicker spooling compared to recirc valves, you seemingly can't give me an answer?

 

I guess you did not read my last post I have nothing more to add as you seem to be going round in circles you must be a woman or a ****ed up man,lets just agree to disagree on the laws of physics about vta and spool up on higher boost cars compared to standard valves.or like I said before google it and then argue with yourself,im done.SJ.

 

Just to add go on to the roger Clark Motorsport site and see what his explanation of a aftermarket vta is and why certain cars should run them then give them a bell in there opening times and argue with Olley and matt for printing false information on there site, I'm done for real this time.SJ.

 

^+1 ..... sorry SJ, know your getting tired of making your point, and if you want to put a link to the roger clarke page that says atmoshperics are better for higher boosts id happily have a read! Ive done a search but cant find owt.

However, i agree with you that for higher boost applications an uprated aftermarket part is needed to more reliably control boost, however there is no advantage of a VTA over a recirc regarding spool, the inlet tract between filter and turbo inlet is essentially atmospheric pressure! Only difference is that if the filtered air has been through a maf sensor, its best staying somewhere between the maf and the engine!

Also, slightly confused as to why you say a dv delete is the best way to go for a track car .... or did i imagine that? As a DV delete (that chatter noise) is essentially the air being forced back through the compressor which is slowing it down, meaning its got more work to do to respool.

If running mafless, atmospheric/recirc/recirc venting to atmosphere ..... makes no difference what so ever! As long as its setup to hold the boost. With the forge for example, tuning the springs and shims up in increments until you find compressor chatter, then backing off one increment will be the best setup for spool possible for every situation.

 

DV delete part is part of your imagination thats ok though I let that one slideI think I must be confusing people.All I'm trying to say is a modified part is going to be more capable of doing a job more then a standard part my point really was not about VTA or recirc as they both do the same job,I will have to go back on the roger Clark site as I can't remember which part I read it on it must of been off of the actual selling part as I can't find it either.SJ.

 

DV delete bit .... yeah, i reread the thread and dont know where i got that from either!

Cheers for clearing up the confusion though, and your bang on, OE recircs are great if running not too much above OE boost .... but when the boost gets up, the parts that hold it in need uprating and tunng to suit as a result.

Im a big fan of the forge recirc! Its quality kit and nicely tunable (not as tunable as the turbosmart but half the price!). Im running one to atmosphere but as im mafless its all good.

 

I'm also using the all-metal Forge MY97/98 pattern recirc off of my FMIC hard pipe, on my MY99 -- by contriving a New Age OEM recirc hose back to the MY99 OEM turbo inlet hose. MAFless too.

Works great, with 'mean'-sounding (lol) turbo chatter noises upon liftoff/gearchanges (presumably because of the open cone?).

Much 'classier' than a BOV's #pfsssst# noise IMO.

 

It was myself & Chopperman(I think) who mentioned DV delete. I'm not really sure why but I think it gives better response & I know quite a few people are doing this now, but it needs to be mapped for & it needs to be a roller bearing turbo to be able to handle it.

 

Changing your argument much? First you're saying VTA valves add spool up over normal (recirc) valves, next you're insulting me, and when someone else calls you out on your lack of knowledge you back down and say you were really talking about aftermarket parts?

Remember I stated from the beginning that my argument wasn't about aftermarket parts being better for high boost applications, my question was how a VTA valve provides faster spool up compared to a recirc valve. It would however seem you have backed down and accepted they provide the same spool characteristics.

On an unrelated note, my take on the DV delete is that the manifold remains pressurized in between gear shifts, so for going up the gears when accelerating hard the turbo takes less time to get back on full boost as the pressure is already there. This would only really be useful with a sequential box though, where the gear shifts, and hence the time off the power, is minimal.

 

ED-EG let me give you some advice know when a conversation is over,it just seems to me that your trying to make a argument i dont know you personally and doubt i will,so just let sleeping dogs lie.legacy gtb has already spoke to me and thats that really.Every thing that I have posted was about boost control on higher boost pressures and not on standard pressures,maybe I explained myself wrong I know that a recirc practically does the same job as a vta but I find that the spool up on high pressure cars that I drive during gear changes get back on pressure quicker and are helped with better boost control.SJ.

 

The force is strong today with lots of newbys
And quite good intelligent conversation on both sides

 

This should be made a sticky I don't know much about the brand but for people new to subarus or turbo charge cars in general and looking a uprated blow of valve either a vta or a recirc and want a explanation have a read here.SJ.: http://www.balancemotorsport.co.uk/m...ges=dumpvalves

 

Good link SJ.

Now you boys play nicely.

 

Great link, cheers mate

 

Is the search function broken?
Surely there must be literally hundreds of dump valve threads now?

If I have a question, I always search first. Seems to be the most efficient way of getting an answer. Faster than waiting for people to reply to your thread as well!

 

No worries.SJ.

 

It most certainly isn't broken BUT your sentence following the question sums the problem up, there is literally 100's!! Which made it very difficult to find a clear answer amongst all the "funny/pee take" replies lol!

This thread seems to contain some very valuable info giving a concise conclusion to the age old debate along with some interesting and valuable links to further the knowledge of fellow turbo/impreza newbies.

Maybe worth making this thread a sticky??