If i hear 1 more person who has just seen a car go past and chatters say " I love wastegate chatter" I'm gunna scream!

That is all...

 

pmsl. I had a guy on YouTube tell me the chatter was the sound of teh engine rocking back and forth Think I'd preffered him to say it was wastegate chatter

 

Sounds like a bright lad.

 

my god have you ever tried to actually explain properly what the noise is, its a nightmare!!

Most people look at you like your speaking japanese!


How many people say a turbo has lag.......its not lag, its boost threshold!!!

 

ok to a newbie cossie owner then i explain it to people as boost coming back through the turbo and being chopped up by the blades in the turbo, is that right?

 

yeh, when the throttle is suddenly closed the pressure in the inlet system has nowhere to go.

this pressure exceeds what the turbo is trying to pump into the system as it is now not fed by hardly any exhaust gas, so the inlet pressure pushes out through the blades in the turbo into the atmosphere.

Hence thats why you can normally make the noise louder on a turbo car by fitting an cone filter if the car didnt have a re-circ valve

 

Pretty much. The throttle closes and the pressure in the pipe can't go anywhere so backs up on the compressor wheel

 

so where does the term 'wastegate chatter' come from then? as it's a very common saying and alot of people beleive that is what is making the noise?

 

Both are correct, they mean different things

 

Would be interested in knowing the differences..

 

i believe lag is the compressor being slow to spin up due to inertia and boost thresh-hold is where the engine is not producing enough gases at a curtain speed to produce positive boost?

correct me if wrong...

 

Very true, alot of people dont know the difference as below so i mentioned the common lol


Boost threshold is the point of rpm when the turbo pushes enough air to reach a certain pressure(say 15psi)

People commonly assume that the later in the rpm it hits this pressure the laggier it is.

Thats a mistake, its called boost threshold.


Lag in its easiest context is the time when your rpm is above the boost threshold and you come off the throttle, you then reapply throttle and lag is the time it takes for the turbo to come back to full pressure.

Some people quote this as 'response'

 

so was i wrong?

 

at the end of the day if everyone thinks its chatter,then thats wot im calling it.....

 

its the same as calling a vacum cleaner a hoover, or an mp3 player an ipod.

its just easier to go with the flow sometimes! unless you enjoy the sound of your own voice and like repeating yourself lots and lots of times.

i just enjoy the smug satisfation that i know better.

 

Ah I see, thanks for the explanations.

So is it lag/response that is experienced between gear changes?

 

So really it should be called turbine blade chatter or blade chatter!

 

very good explainations of them
lol

 

Just call it Chatter. Thats it.

 

Or fit a dumpvalve.

 

its none of anything,

Its nothing todo with the turbo, its the bird you just sucked up through your air duct. its birdtwit... lol..

 

its wastegate chatter lol....

 

vtec > ghey chatter

 

yours sounds well mint when it comes on cam imo.

 

all that lag and no turbo LOL = V-Lag

 

exactly.

oh say you come to a corner, change down to a point when your rpm is above the rpm you normally hit full boost, press the accelerator and the time you have to wait to hit full boost again is lag

 

correct me if im wrong but i thought lag = time till turbo creates usable boost not full boost?

 

no what you mean mate had some bloke tell me i had a nice grp a dump valve on my my car lol i just said thanks lol

 

Only if your a full blown shirt lifter

 

Take a Valium tablet mate if you are upset by that you wont last 2 minutes in the real world. This country is in the worst mess for 70 years & 'wastegate chatter' is causing you to crack . Perhaps a reality check is in order or even treatment .

 

Ok Gramps

 

All I say to 'wastegate chatter' is "Compressor stall".

 

Think there is too much "chatter" going on , on this tread!

 

I hate it when people don't know what chatter is, I had an argument on youtube with a guy about my video cos he was saying it wasn't turbo chatter!!

http://www.youtube.com/watch?v=cPZZvd55hxg

what a goon!

 

I got fed up with the Net experts telling me ithe turbo would gail and all th ediferent explanations of the chatter sound. It really got quite comical

 

Thats OK remember i was young once, well i think i was .

 

that look mint