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Author Wastegate chatter - turbo peeps ???
CRB 553
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Registered: 5th Apr 02
Location: NE Drives: Punto GT
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19th Oct 04 at 15:50   View User's Profile U2U Member Reply With Quote
just heard this from a few people on turbosport.co.uk
'there is no such thing as wastegate chatter - the sound is the charge air 'bouncing off' the turbo blades when you close the throttle.'

-is this the fluttering noise ive heard that i assumed was just the dump valve ?

And also what the (sexual) noise when an evo is about to launch, is that just the limiter or is it a wastegate thing ?




[Edited on 19-10-2004 by CRB 553]
Budgey
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Registered: 7th Jul 04
Location: Leven, Fife
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19th Oct 04 at 16:10   View User's Profile U2U Member Reply With Quote
compressor surge?
Kerry
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Registered: 5th Oct 01
Location: Norwich
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19th Oct 04 at 16:42   View User's Profile U2U Member Reply With Quote
my noise is due to me removing the recirc valve and fitting a blow off valve. i was under impression it is was just compressed air
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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19th Oct 04 at 16:48   View User's Profile U2U Member Reply With Quote
the chattering with BOV's is just when you lift off gentle.... the air farts out rather than surges out
CRB 553
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Registered: 5th Apr 02
Location: NE Drives: Punto GT
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19th Oct 04 at 16:49   View User's Profile U2U Member Reply With Quote
yeh kerry thats ur blow off valve doin its woosh thing but the noise they refer to is b4 the blow off valve goes off.
timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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19th Oct 04 at 23:28   View User's Profile U2U Member Reply With Quote
CRB... the "chatter" noise is the air exitnig the system the same way it came in, but backwards LOL

So it echos off the blades.

Which is why a dump valve does help stop lag a tiny tiny bit, as it keeps the blades going the same way (compared to the air forcing them backwards, and causing I think compressor stall, i think??)

Still I love the sound of chatter, I will NEVER put a dump valve on my car!
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
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20th Oct 04 at 00:04   View User's Profile U2U Member Reply With Quote
Shinee was telling me that the chatter was the sound of air being forced back through the wastegate, and the wastegate opening/closing VERY fast. i think.
goldfish
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Registered: 7th Feb 03
Location: we have a grass in CS he is a chav
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20th Oct 04 at 08:26   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by CRB 553
just heard this from a few people on turbosport.co.uk
'there is no such thing as wastegate chatter - the sound is the charge air 'bouncing off' the turbo blades when you close the throttle.'

-is this the fluttering noise ive heard that i assumed was just the dump valve ?

And also what the (sexual) noise when an evo is about to launch, is that just the limiter or is it a wastegate thing ?




[Edited on 19-10-2004 by CRB 553]


you do get fluttering of the VTA DV if your on partial throttle and lift off slowly. a DV noise sounds like a sneeze
timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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20th Oct 04 at 09:45   View User's Profile U2U Member Reply With Quote
That is because there is not enough pressure to open the DV, so it comes back out where it has come from (like having no DV), hence the slight flutter.
ajscorsa
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Registered: 30th Apr 02
Location: Perceton, North Ayrshire
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20th Oct 04 at 09:56   View User's Profile U2U Member Reply With Quote
my m8s galanza v makes the fluttering noise on high boost sounds amazing its the standard dump valve tho so dunno how its done
goldfish
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20th Oct 04 at 10:27   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by timrud_
That is because there is not enough pressure to open the DV, so it comes back out where it has come from (like having no DV), hence the slight flutter.


the DV moves when you lift of because of the vacum
timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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20th Oct 04 at 11:16   View User's Profile U2U Member Reply With Quote
Pop your bonnet, pull the throttle cable and watch the DV then!
goldfish
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20th Oct 04 at 11:43   View User's Profile U2U Member Reply With Quote
mine used to move as soon as the cable was touched. if it did not close then you'd be losing air.
Nismo
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Registered: 12th Sep 02
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20th Oct 04 at 12:05   View User's Profile U2U Member Reply With Quote
external wastegate is the way forward.
goldfish
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20th Oct 04 at 13:05   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Nismo
anal sex with young boys is the way forward.


wrong forum

 
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