what makes the WRC cars wastegate so audible - can Blobeye STis be modded safely to have a lttle of this character?

 

I believe what you need is an external wastegate, which can be adapted to any turbo-charged car, but they are quite expensive. Try demon tweeks.

 

disconnect your dump valve. the noise is the compressed air being forced back trough the turbine blades the wrong way when the throttle shuts and the air has no where to go.

will not do your car much good tho.

 

i heard you can get these for n/a cars.....i want one for my 106.,,,and a flammer kit to give it that rally look and feel....awesome!

 

not sure guys, I think it is simply the waste gate
a) being audible
b)bouncing off its seal

confirmation anyone?

I am assuming the waste gate and the dump valve are seperate components

can anyone link to a schematic?

I think we could all benefit from a little education on these items..

 

You are taking the **** I hope?

And I've just posted on the dump valve thread as to what causes the chatter and how to get it on your scoob. Provided you can afford to buy a new turbo once in a while that is

 

the dump valve - is located on the intercooler.

the wastegate is located within the turbo.

dumb valve released excess pressure when the throttle shuts. hence the vent to atmosphere valves pshhhhttt on gear changes (when you shut the throttle off).

wastgegate allows exhaust gas to bypass the turbine blades to stop the turbo making more boost. this is how a bleed valve (dawe) works. it bleeds off pressure from the actuator so it doesn't open to a higher pressure (boost).

it is commonly called wastegate flutter but in reality is the turbine stalling on back pressure.

 

...and theres me thinking this is a freindly bbs....

 

cheers JJ

So the 'flutter' I heard on the road Esprit and we all hear on comp cars is due to unsilenced (ie not routed back into main exhaust) wastegates porting direct to atmos? - this would presumably charged with flame though...

 

Shim an aftermarket re-circulating dump valve to get this audio effect (assuming you have a turbo'd car)

 

It is but what you posted was funny

 

Get yourself back to pgac boyo!

fake blow off valves and flamer kits indeed,i bet you got a subaru bonnet scoop on your 106 havnt you
mark

 

Exactly, I thought it WAS a joke

Sorry to all I may have offended

 

doesnt a waste gate reduce the life of the turbo?

 

Quite the opposite!

As in any closed loop feedback system you have to have some controlling mechanism as if left alone it will spiral out of all control. This is what the wastegate does. At the desired boost level the wastegate opens to bypass some of the exhaust gasses around the turbo, it then opens and closes to keep the target boost constant. All turbos (AFAIK) have them, either integral (all unmodified scoobies) to the turbo itself or external.

 

so could a scoob with no engine mods have one fitted (i have an 04 sti)?

Where can i get one and have it fitted too!!

 

hello arm!!!! :-)
we would love wastegate flutter :-P

 

You already have one!

Without it your turbo would spin out of control and disintigrate, assuming your engine doesn't blow first.

 

Yeh nice oce buddie,,, i think you could get all that from where they do the neons... M8...


Dazza

 

To get "proper" chatter/compressor surge (which is what we're all talking about) on throttle closures, remove dump valve and blank off hole where it should be (as per rally cars - WILL shorten life of turbo bearings +/- risk catastrophic compressor failure with time).

To get a similar effect with less risk (on MHI and IHI VF3x turbos, NOT VF2x turbos as have a fragile compressor), fit a forge recirc DV with the red spring and a couple of shims. It'll still "dump" on full throttle closures over a certain pressure, but will chatter on partial throttle lifts. Probably will still shorten bearing life, but hey turbos aren't built to last forever

Simon

PS you won't hear anything unless you've got an induction kit fitted as the resonator box removes the sound with the normal induction setup.

 

I seem to have read somewhere that the wastgate on the WR1 is different to standard and makes that chattering sound. Apparently it was one of the ways they got the extra power, as it controls max boost more accurately (or something like that but I may be showing my ignorance)!!

 

nah the wr1 suposedly has a 3port boost solenoid which helps control higher levels of boost compared to the standard 2 port.

did anyone confirm this ?

 

Our cossie westfield has the wastegate removed. It makes some impressive chattering noises... Sounds good when timed to coincide with going under bridges.

Makes the unsuspecting jump a bit tooo......

Didnt think it had a negative effect on turbo life though.

 

I think i've read a post by Bob Rawle who confirmed it.

 

It does have and yes does make a different noise.

 

Hope you mean dump valve

 

real awesome

 

I've got a my97 classic, I had the intercooler off a while back to clean etc.
When I re-fitted the standard dv I fitted it the opposite way round ( so the pressure holds it closed ) when testing after the car now makes the fluttering sound when you come off the throttle!

Anyone else tried this?
Is it likely to cause damage?

 

anyone??