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07-17-2013, 11:25 AM | #1 |
Scooby Newbie
Member#: 360949
Join Date: Jun 2013
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The chirp chirp from impreza rally cars
I was wondering if I could make my car do the chirp chirp that the old impreza rally cars would make cause I think it sounds pretty cool, that is if it doesn't damage anything
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07-17-2013, 11:47 AM | #2 |
Scooby Specialist
Member#: 355254
Join Date: May 2013
Chapter/Region:
MWSOC
Location: Columbus, Ohio
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This place:
http://vtcar.com/ Tell them you want the "chirp chirp". Tell them you have an open checkbook. Please report back. Thank. |
07-17-2013, 04:51 PM | #3 | |
Scooby Guru
Member#: 3560
Join Date: Jan 2001
Chapter/Region:
South East
Location: Four Oaks, NC
Vehicle:20 BRZ 04FXT22WRX95rallyimpreza |
Quote:
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07-17-2013, 12:04 PM | #4 |
Scooby Specialist
Member#: 138000
Join Date: Jan 2007
Chapter/Region:
BAIC
Location: et ament meminisse periti
Vehicle:Buy Nate's coffee west coast roasting |
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07-17-2013, 12:06 PM | #5 |
Scooby Specialist
Member#: 175624
Join Date: Mar 2008
Chapter/Region:
MWSOC
Location: Wichita, KS
Vehicle:0304 WRX WRX SY WRB |
It's compressor surge - caused by running no bypass/blowoff valve at all.
This may cause damage to the turbo's compressor wheel. Prodrive typically didn't care (because racecar,) you might care a little bit - as turbos aren't typically a disposable commodity. |
07-17-2013, 02:09 PM | #6 |
Scooby Guru
Member#: 88501
Join Date: Jun 2005
Chapter/Region:
BAIC
Location: NorCal
Vehicle:2011 WRX Hatch Dark Grey |
Novelty product idea!
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07-17-2013, 04:02 PM | #7 |
Scooby Specialist
Member#: 30909
Join Date: Dec 2002
Chapter/Region:
NESIC
Location: lastditchracing.net & 03 STI
Vehicle:RA East Open Class Champs 07-08-09 |
That chirp-chirp is the sound of massive wads of $$$ blasting out the tailpipe in a haze of sweet-smelling race gas vapor.
Easy to make your own car sound exactly like that....Just Apply Money. |
07-18-2013, 02:14 AM | #8 |
Scooby Newbie
Member#: 324962
Join Date: Jul 2012
Chapter/Region:
BAIC
Location: Morgan Hill CA.
Vehicle:02 WRX |
I've never herd a definitive answer about where it exactly comes from, but have herd people say compressor surge. The commentators on FIA rallycrossRX say its the waste gate, whatever it is its definitely from a lack of bov. Running 4.5 bar through a $16,000 turbo with a little fresh air als on the side cant hurt either!
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07-18-2013, 08:59 AM | #9 |
Scooby Newbie
Member#: 360949
Join Date: Jun 2013
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Cool, thanks guys and thanks for the link! I think I'll go without the chirp chirp for now then lol
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07-18-2013, 10:15 AM | #10 |
Top Scoob 009
Member#: 68273
Join Date: Aug 2004
Chapter/Region:
MAIC
Location: IAG Performance
Vehicle:2012 WRX GD Race Car |
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07-18-2013, 10:46 AM | #11 |
Scooby Newbie
Member#: 188325
Join Date: Sep 2008
Chapter/Region:
International
Location: Singapore
Vehicle:2008 WRX Sedan WR Blue |
Gigi Galli testing the Evo WRC a few years ago. The chirp chirp starts 1:05min.
Freaking gorgeous symphony. It's due to compressor surge. I managed to achieve with a VF52 and PW TMIC using a Forge BPV and hardest red spring. But not as loud as that. |
07-18-2013, 12:38 PM | #12 |
Scooby Newbie
Member#: 351310
Join Date: Mar 2013
Chapter/Region:
SWIC
Location: Phoenix
Vehicle:2013 WRX Crystal B RIP |
Lol it sounds like a dolphin. Or a chipmunk!
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07-18-2013, 01:44 PM | #13 |
Scooby Specialist
Member#: 94316
Join Date: Aug 2005
Chapter/Region:
Tri-State
Location: Northern Westchester
Vehicle:2002 WRX |
This may be a dumb question, but why not use a BOV? Less lag?
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07-18-2013, 01:53 PM | #14 |
Scooby Newbie
Member#: 324962
Join Date: Jul 2012
Chapter/Region:
BAIC
Location: Morgan Hill CA.
Vehicle:02 WRX |
Its supposed to keep the ic tubing pressurized for better throttle response or something like that.
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07-18-2013, 03:03 PM | #15 |
Scooby Newbie
Member#: 7869
Join Date: Jun 2001
Chapter/Region:
MWSOC
Location: MPLS, MN
Vehicle:2011 STi TheUrbanRallyProject.com |
man, I forgot how gorgeous those WRC cars were. I loved that era of rally racing
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07-19-2013, 07:04 AM | #16 |
Scooby Specialist
Member#: 48713
Join Date: Nov 2003
Chapter/Region:
NESIC
Vehicle:1888 Bellipotent Wooden |
There's no BOV because the throttle never shuts and the intake manifold never goes into a vacuum state. ALS keeps the throttle open-
The purpose of a BOV is to keep the turbine from stalling which happens when the throttle shuts. It surges because the turbo is making more boost than the engine can take in at low throttle angles. This is due to the anti-lag. |
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