how is this chatter noise acheived
29 November 2011, 09:36 PM
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29 November 2011, 09:43 PM
#7
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The sound is compressor stall, the air going back across the turbine when the throttle is closed.... general concensus is that TD series turbos can handle it, VF not so well....
Just remove the OE re-circ dump valve and block off everyhting that connected to it.
As for 'Mushroom' - Its a nickname for a HKS style filter.
Either that or you're doing things with garden produce.
Just remove the OE re-circ dump valve and block off everyhting that connected to it.
As for 'Mushroom' - Its a nickname for a HKS style filter.
Either that or you're doing things with garden produce.
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29 November 2011, 09:59 PM
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i never really noticed mine until i put my front mount on, the standard topmount and piping i presume did not hold enough volume of air to cause much compressor stall, afterwards it was very loud. i put my HKS back on tho as i dont want compressor stall.
30 November 2011, 03:46 AM
#15
Mine did it a lot with having the dump valve blocked off on my old 93 wrx, Standard IC,and turbo.
I know turbo's are cheap to pick up nowadays, However the damage a bust turbo could do to your engine. Is it worth it?.Not a criticism. . Just a general question
I know turbo's are cheap to pick up nowadays, However the damage a bust turbo could do to your engine. Is it worth it?.Not a criticism. . Just a general question
30 November 2011, 04:20 AM
#16
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It's easy on some cars to achieve, my skyline, 200sx and my RX7 all did it, even my mates GT4 does it now. From what I can tell the ingredients needed include, as straight a pipe as possible from turbo to induction (cone being loudest) higher boost, and if my mates GT4 is anything to go by, a FMIC seems to make a sizeable difference 
removal of DV does make it easier, but I personally wouldn't advise this, especially if running higher boost!!! You just need to come off throttle slower while pressure is still up simples 
removal of DV does make it easier, but I personally wouldn't advise this, especially if running higher boost!!! You just need to come off throttle slower while pressure is still up simples
30 November 2011, 05:21 PM
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You should have hear my little old VF35!!
That said, A SC46 with an FMIC and all the inner wing induction gubbins is even nicer!
That said, A SC46 with an FMIC and all the inner wing induction gubbins is even nicer!
30 November 2011, 05:42 PM
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Same as Scooby Dooer 69. Think he has a large k&n (maybe even RCM large one) and DV delete. Makes a fair bit of noise
