hiya all,

just got a uk2000 turbo,lovin it

it has a full decat and air filter,baileys DV

it smetime makes a flutter sound at low boost and always a tisssssssssss on high boost,

basicly i want to looose the tisss, and replace with the chatter/flutter sound ( EG like a lot of cossies iv seen)

i know theres loads of opinions about it will damage the turbo or not, but im yet to find anybody who has damaged there engine or turbo

( to be honest im not too botherd if it damages the turbo, i can get another, but just dont want any damage to the engine)

please be honest peeps, and also if somebody can tell me how to take off the baileys DV to do it ( and what i need to plumb were! )


thanks dave

 

YouTube - VL Turbo Flutter 2



this is the sound i want ( just the flutter sound, not the knocking )

 

As far as I know (and im new to scoobys and turbos ) its called compressor surge YouTube - SR20DET Compressor Surge. I'm led to believe all you have to do is remove the dump vave.

Stu.

 

thanks stu,

thats the sound i want, HOWEVER i understand it that compresser surge is heard when the turbo is spooling UP, and NOT when u let off the gas . ( ? )


any idea what i need to do to remove my DV and if i need to re-plumb anything?

 

the comes when you let of the gas like a dump valve, your dump valve is fitted onto your intercooler (slightly to the right as your facing the engine bay) you will need a recirculating valve to replace, fleabay is the best place for one but make sure it fits your year of intercooler, 10 mins to fit ...easy

 

the removing the DV damage the turbo and reduce spool up time?

Sounds awesome tho.

 

still unsure of how to remove the dump valve - what do i put in its place? do i need to re-plumb anything?

also, im not botherd about damaging the turbo, there not that much to replace for another td04, BUT i dont want to cause any egine damage.............

 

http://www.youtube.com/watch?v=469mi4UOVK0

this is what you want eh

 

well if ur turbo sheds anything into the engine then its bye bye engine too..

 

Blank off were the dumpvalve fitted to the cooler and blank off any other pipes that went to the dumpvalve.

I have a spare td04 yours kills itself.

 

Have a read of this mate

https://www.scoobynet.com/general-te...han-noise.html

I'm now running DV'less, and think it's a huge improvement.

 

i had that flutter on my c20let corsa what had happened was the pipe that runs into the top of the dump valve the vacum hose had popped of so if you want that noise constantly just un plug the vacume hose...not sure if you will have to bung up the vacum hose tho but it will do the flutter either way

 

YouTube - Impreza dump valve + exhaust thts mine fella vid isnt great but u get the pic, running front mount, induction kit n blitz dump valve

 

hmm i might have to try this on the weekend. got vf28 iirc so a little risk. im sure trying it for a couple of days wont hurt tho.

Im running std recirc. what is it i acutally need to do? Any pics?

 

I put an M8 bolt in the small vac pipe, and already had a bung in the pipe to the turbo intake, then blocked off where the BOV was.

 

sounds nice mate, but u say ur still using a dump valve?

i thought the only way to get the chatter was without a dump valve?

 

thats EXACTLY the sound i want


and if it " SOOOO BAD" for the engine, WHY would prodrive make it like that ??? ( this is for any haters out there that cant show me any evedence that its bad for the engine)

 

If you want an answer to that question, you could start with the fact that the car was a concept, and thus they did it because it was cool, not because it was practical as a long-term daily driver. The second point is that the P2 might have an EJ block at its heart but it's not like they pulled an engine straight out of a roadgoing Impreza. Once you start changing things like the engine management to add ALS, you change a load of other things as a consequence and so the potential risks become different.

The WRC cars make that noise because they have no dumpvalve and ALS, but the turbo on a WRC car needs rebuilding every 600 stage miles and the exhaust manifolds are by and large disposable parts. In competition it's acceptable wear and tear, but in roadcar terms you could definitely count it as "bad" for the engine.

Haters? Who invited the So Solid Crew in? Deleting the dumpvalve is cool but there's no doubt it has the potential to damage the engine under certain circumstances. Aside from the increased stress on the turbo bearings, there's the potential to stress fracture the compressor (and so for small shards of cast aluminium to make their way into the innards of your motor).

You also have to bear in mind that the pressure waves shooting backwards through the inlet tract on lift-off can shock the mass airflow sensor, and (quite quickly in some circumstances) damage it.

That's not an issue for a MAP-based engine (which the P2 almost certainly has), but for a MAF-based regular Impreza, the consequences of this sensor degrading unnoticed are pretty well known and not pleasant.

 

So for this to be a sensible mod on a classic i will be needing a Simtek Mafless and a decent turbo VF35 or better.

ALS is somethign else which would be nice. Im told my vf28 can take some ALS but again at risk. What turbos are suitable for decent als? not necessarily full als?

My car is a weekend/track beastie, but it does have to remain relativly damage free as i care for the things i have!

I think you can pick up vf35's for a few hundred quid. up the injectors at the same time as a simtek and jobs will be a good un

 

its not worth the extra money TBH, it makes no difference to performance, only thing you will be paying the extra 150 for is a few pops and bangs at lower revs, you dont even hear it on track either as your usually well up into th rev range

 

**********UPDATE*********

removed DV from hose going into intercooler and blocked it off, there was also another hose going into the top of the DV from the top of the mainifold,again blocked it up.


results, no running issues like some others, however i must say.........kinda disapointed - not really much chatter ( even when giving it some beans) in lower gears, but nice and present in high gears?!?!


however, when in 1st,2nd and sometimes 3rd, i get a kinda "gush" sound rather then the flutter/chatter..............anybody able to enlighten me?


also, in terms of pops and bangs, if anything i would say mine has increased a little bit! sounds fecking lovly,but is it meaning i done something wrong?

*** 3.5 hks FULL turbo back de cat, k'n'N filter*****

 

Have you got a panel filter or a CAIK?

It works best with a CAIK.

 

What were you expecting? You're never going to replicate the volume of the world rallycar chirping as they have a completely different design of inlet tract, and, most importantly, much greater air volume and pressure than you'll be generating in your road car.

As has been said you'll get more noise with a straight through induction kit than you will with the standard airbox and resonator, but beyond that, you've got what you've got. The more open the induction tract, and the more boost you run, the louder it'll be.

"Wrong" is a debatable point, isn't it? You've achieved what you set out to achieve. Whether the effects prove to be unhealthy for the engine or not, only time will tell.

What you probably should be doing is datalogging your engine both before and after - and paying very close attention to your mass airflow readings, both on acceleration and lift-off.

 

chrisdicko - a cone filter


Splitpin-

What were you expecting? You're never going to replicate the volume of the world rallycar chirping as they have a completely different design of inlet tract, and, most importantly, much greater air volume and pressure than you'll be generating in your road car.

As has been said you'll get more noise with a straight through induction kit than you will with the standard airbox and resonator, but beyond that, you've got what you've got. The more open the induction tract, and the more boost you run, the louder it'll be.

i do agree- im not expecting WRC stanards, HOWEVER, haing heard
a lot of cossies they can be heard nice and present in low gears aswell as high


also, when in low gears i kinda get a "gush' rather then chatter/flutter

 

this is simple!! get a fmic with a k&n induction kit and then listen!! you will get the flutter noise all day, plus you can hear the turbo spool up(really loud spool up)!

its even better when your pushing 1.4bar through it!!!

p.s you can even keep your dv!! the hks is good for this! its what i have on mine!!

 

i have a uk2000 - standard apart from 3.5 hks turbo back decat and k&n cone air filter

if i put a fmic wouldnt this just give me loads of lag? i would need it mapping but as mine is a 97 i would need aftermarket ecu?

 

If you kept all other things equal, yes, you'd get worse throttle response. The potential for damaging the mass airflow sensor also increases with a front mount, as the longer inlet amplifies the reverse pressure waves, which would give you an even stronger reason to switch to an aftermarket ECU.

You've probably already knocked the ECU calibration out by swapping the standard air intake out for the cone so to a degree you've already blown the neighbourhood on this.

Have you thought of getting a CD with a load of turbo noise on it, and triggering your stereo to play a track at random whenever you lift off? It's probably the most cost-effective way of getting you where you want to be. If you want a car that sounds just like a Cosworth, wouldn't buying one be a simpler option?

If you were chasing power, there'd be a reason for intercooler and ECU swaps. Entertaining those sorts of ideas just because you're trying to make an Impreza emulate the sound of something else seems a bit of a pointless and counterproductive exercise.

 

^^^ Well said

 

You've probably already knocked the ECU calibration out by swapping the standard air intake out for the cone so to a degree you've already blown the neighbourhood on this.


i did think of this already, and i agree


Have you thought of getting a CD with a load of turbo noise on it, and triggering your stereo to play a track at random whenever you lift off? It's probably the most cost-effective way of getting you where you want to be. If you want a car that sounds just like a Cosworth, wouldn't buying one be a simpler option?

easy mate, not trying to take the **** out of you, please dont do it to me.and i much prefer my subaru to cosworth,there a little dated imo- but the ones i know of sound v.nice

If you were chasing power, there'd be a reason for intercooler and ECU swaps. Entertaining those sorts of ideas just because you're trying to make an Impreza emulate the sound of something else seems a bit of a pointless and counterproductive exercise.[/quote]


my point, i dont wish to make these changes just for a sound - its stupid!


just want to enjoy my new car,with a nice sound rather then a ear blitzing tissss!

 

Standard dump valve is the way forward