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+--- Thread: A question about turbo noises. (/showthread.php?tid=19753)
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A question about turbo noises. - Tom - 20-12-2013
Why is it that when a petrol turbo revs it goes bwarp chu chu chu yano that epic noise i cant make. But a diesel just whistles if we're lucky or maybe sneezes when you load it up? I know some of the vnt diesels make epic noises but not like a petrol.
Im guessing its to do with the throttle butterfly shutting?
RE: A question about turbo noises. - Craigus - 20-12-2013
Wastegate chatter?
RE: A question about turbo noises. - Piggy - 20-12-2013
Nope.
Mine chatters n chuffs n pwooshes
Ill try n get a video sorted for noises
RE: A question about turbo noises. - Jenkosowls - 20-12-2013
You mean compresser stall it's because pervs have a throttle body the turbo compressors the air against it and it has no where to go so it flows back and stalls the compressor wheel creating the noise. Hence why pervs have recirc/bovs
RE: A question about turbo noises. - Tom - 21-12-2013
^^ Thats bang on what i thought it was.
RE: A question about turbo noises. - Dum-Dum - 21-12-2013
You can make epic compressor stall noises on a diesel but compressor stall is a turbo killer.
Wastage chatter is a myth and is usually compressor stall.
RE: A question about turbo noises. - 4WayDiablo - 21-12-2013
www.youtube.com/watch?v=6jzUFdUc8nY&feature=youtube_gdata_player
RE: A question about turbo noises. - mikey b - 21-12-2013
If you run unfiltered onto the turbo ( silly thing to do but sounds good ) they will do it if your going along hard and put ya foot on clutch hard but don't do ya turbo much good
RE: A question about turbo noises. - Piggy - 21-12-2013
I'll sort a video today if I can to show GT20 epic chatter
RE: A question about turbo noises. - Ruan - 21-12-2013
Waste gates don't make any noise at all other than when they open the engine just gets much louder...
It's the throttle plate shutting that causes that noise... It's not a good noise by any means, it's the sound of the compressor flow becoming Un stable and forcing itself ways it doesn't want to go because the compressor is spinning too slowly to support the pressure created and airflow demanded...
RE: A question about turbo noises. - Piggy - 21-12-2013
so as I aint got a throttle plate...whats all me noises!?
RE: A question about turbo noises. - Ruan - 21-12-2013
As said, compressor spinning too slow for the amount of pressure produced and air demanded. This is the problem with turbos that are very efficient, they move so much air at low engine speeds and spin up so fast, that as soon as the exhaust gas flow slows, it instantly causes it to begin to surge..
The biggest problem lies when those noises happen on the throttle, that's because it's making so much air, even with the exhaust flow, there's no way it'll stay stable, so then starts making horrible noises... A lot of pressure is placed on the compressor shaft when it happens, combined with the exhaust gas spinning the turbine, it's a situation for snapping turbine shafts... It's like the compressor trying to do one thing, and the turbine doing another...
RE: A question about turbo noises. - Piggy - 21-12-2013
sounds like I need a bigger turbo
its only when throttling off I get the choo choo sounds.
Just a lot of WOOOOSH when Im accelerating
RE: A question about turbo noises. - Piggy - 21-12-2013
sorry about the poor position of me camera...insulation taped me phone to me rear view!
RE: A question about turbo noises. - Chris_90 - 21-12-2013
Are you de-filtered piggy? Looks like that goes extremely well! Think more boost your gonna take off
RE: A question about turbo noises. - Piggy - 21-12-2013
(21-12-2013, 05:18 PM)Chris_90 Wrote: Are you de-filtered piggy? Looks like that goes extremely well! Think more boost your gonna take off
Nope. Gearbox mounted turbo with about a 400mm pipe to 'cross filter mounted almost behind passenger headlamp
Only at 1.3bar...lots to go yet
RE: A question about turbo noises. - Chris_90 - 21-12-2013
(21-12-2013, 05:37 PM)Piggy Wrote:(21-12-2013, 05:18 PM)Chris_90 Wrote: Are you de-filtered piggy? Looks like that goes extremely well! Think more boost your gonna take off
Nope. Gearbox mounted turbo with about a 400mm pipe to 'cross filter mounted almost behind passenger headlamp
Only at 1.3bar...lots to go yet
What's that in a propa measurement? (psi)
RE: A question about turbo noises. - Dicky - 21-12-2013
(21-12-2013, 06:02 PM)Chris_90 Wrote:I think 1.3 bar is like 18psi?(21-12-2013, 05:37 PM)Piggy Wrote:(21-12-2013, 05:18 PM)Chris_90 Wrote: Are you de-filtered piggy? Looks like that goes extremely well! Think more boost your gonna take off
Nope. Gearbox mounted turbo with about a 400mm pipe to 'cross filter mounted almost behind passenger headlamp
Only at 1.3bar...lots to go yet
What's that in a propa measurement? (psi)
RE: A question about turbo noises. - Tom - 21-12-2013
Around that yeah ^^
Mine actually made a choo choo noise earlier. I didnt here it the gopro did. And it wasnt even full boost just a gentle pull away into second and goes chooooo.
RE: A question about turbo noises. - Chris_90 - 21-12-2013
All these choooo'ing sounds are the sounds of turbos slowly killing them self's
18psi wouldn't have thought there's much more in the gt2056? Maybe 22psi
RE: A question about turbo noises. - Anton - 21-12-2013
My 2052 is pretty sweet at 24-26psi
RE: A question about turbo noises. - anto - 21-12-2013
My little gt15 did it at 30+psi. Not healthy at all, but sounded class.
RE: A question about turbo noises. - Chris_90 - 21-12-2013
(21-12-2013, 06:58 PM)Anton Wrote: My 2052 is pretty sweet at 24-26psi
Oooo thought they started to shit there self's over 25psi.... You had yours dynoed Anton?
RE: A question about turbo noises. - padge - 21-12-2013
http://s112.photobucket.com/user/w1n_2006/media/edd8d0c8.mp4.html
RE: A question about turbo noises. - Piggy - 21-12-2013
(21-12-2013, 07:14 PM)anto Wrote: My little gt15 did it at 30+psi. Not healthy at all, but sounded class.
Little older turbos can manage that but they aint moving any more air over 25psi....just making heat
(21-12-2013, 06:58 PM)Anton Wrote: My 2052 is pretty sweet at 24-26psi
Thats my aim...about 24psi
And do remember the GT2052 and 56 's' are both very efficient and move a lot more air at low psi that a t2 or gt15 would ever provide even at twice the psi
RE: A question about turbo noises. - Chris_90 - 21-12-2013
(21-12-2013, 07:33 PM)padge Wrote: http://s112.photobucket.com/user/w1n_2006/media/edd8d0c8.mp4.html
What car/turbo was that?
RE: A question about turbo noises. - padge - 21-12-2013
my old xud, T2 @ 28psi de-filter.
RE: A question about turbo noises. - Piggy - 21-12-2013
My old t2 made funky noises...didnt last long tho
A question about turbo noises. - Sambarker - 22-12-2013
Mine did as soon as is fitted a fmic. Wachacha when coming off boost in 4th
RE: A question about turbo noises. - Tom - 22-12-2013
Runs to ebay to buy a gt series
Thanks Piggy appreciate those vids mate you can really here it!