Whistle on acceleration???
Thread Starter
Pro
Joined: Aug 2003
Posts: 535
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From: Kailua HI
Whistle on acceleration???
I bought my car with a Vortex air set-up so I do not know how it sounded before, but when I accelerate, I get a whistle sound from under the hood. Is this normal, or should I dig deeper to see where it is coming from.
I have a crack on one side of where the clear vortex bolts up to the shroud, but I can't imagine air escaping through there would cause the whistle.
Keep in mind it only happens when I accelerate...ones the car flattens out and I have a constant speed, the sound goes away....it is louder the harder I accelerate.
Rodrigo
I have a crack on one side of where the clear vortex bolts up to the shroud, but I can't imagine air escaping through there would cause the whistle.
Keep in mind it only happens when I accelerate...ones the car flattens out and I have a constant speed, the sound goes away....it is louder the harder I accelerate.
Rodrigo
Team Owner
Joined: May 2002
Posts: 24,459
Likes: 13
From: Phoenix
St. Jude Donor '03-'04-'05-'09
Re: Whistle on acceleration??? (Monster231)
While out roadracing, friends watching me said mine, on the long straightaway would whistle...not at idle. I've never heard it ????
Advanced
Joined: Oct 2002
Posts: 73
Likes: 0
From: Ft Myers FL
Re: Whistle on acceleration??? (DUCMAN)
Had same problem on my 2000, it might be the intake...GM had a bulletin
on whistling intakes...theres a thread on here somewhere that explains the
sound and how to fix it cheap...if I remember right its using some epoxy
to fill a part of the intake right after the tb..hope this helps :cheers:
on whistling intakes...theres a thread on here somewhere that explains the
sound and how to fix it cheap...if I remember right its using some epoxy
to fill a part of the intake right after the tb..hope this helps :cheers:
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Burning Brakes
Joined: Feb 2001
Posts: 793
Likes: 2
From: Milwaukee & Long Beach WI & CA
Re: Whistle on acceleration??? (DUCMAN)
After installing my vortex I noticed the filter for the air pump inlet hose makes a whistling sound. It doesn't happen everytime I accelerate. Seems like mostly under part throttle acceleration from idle, which I assume is when the air pump kicks in to pump fresh air into the exhaust to aid the catalytic converter do its thing.
The air pump filter is mounted next to the vortex shroud on the radiator shroud that's cut to install the filter. If that's it, you'll be able to hear it with the hood open and some else hitting the throttle. I haven't heard of too many people complain about it, so maybe breathless performance changed to a different filter at some point. Mine is a small black plastic box (like 1"x1"x2") with a circular intake opening and a white fiberglass like filter material.
The air pump filter is mounted next to the vortex shroud on the radiator shroud that's cut to install the filter. If that's it, you'll be able to hear it with the hood open and some else hitting the throttle. I haven't heard of too many people complain about it, so maybe breathless performance changed to a different filter at some point. Mine is a small black plastic box (like 1"x1"x2") with a circular intake opening and a white fiberglass like filter material.
Drifting
Joined: Oct 1999
Posts: 1,576
Likes: 0
From: Austin TX
Re: Whistle on acceleration??? (DUCMAN)
Mine whistles loudly at part throttle accel. Thought it was the intake whistle everyone talks about, but when I had the blower installed, the whistle remained.
It's the K&N filter on mine, there is a resonance across the filter media.
I actually like it. People hear it, and say "Oh cool, is that the supercharger??" I say nope, bury the throttle and say "THAT'S the supercharger.." :D
Don't worry about it; if it bothers you too much you can replace it with another air intake.
F
It's the K&N filter on mine, there is a resonance across the filter media.
I actually like it. People hear it, and say "Oh cool, is that the supercharger??" I say nope, bury the throttle and say "THAT'S the supercharger.." :D
Don't worry about it; if it bothers you too much you can replace it with another air intake.
F
Racer
Joined: Jul 2003
Posts: 270
Likes: 0
From: granada hills california
Re: Whistle on acceleration??? (DUCMAN)
It's normal , nothing to worry about , as someone mentioned bbk throttle bodies really whistle . my black on black z is known in the neighborhood as the stealth bomber. The whistle is muffled in stock air box , most aftermarket air systems will amplify this whistle,vararam vr1b systems with bbk throttle body sounds like turbo's spooling up, unfortunatly there is the absence of boost.
Team Owner
Joined: Apr 2001
Posts: 36,453
Likes: 2
From: Overwhelmed as one would be, placed in my position.... DFW, TX
St. Jude Donor '05
Re: Whistle on acceleration??? (SQEZN BI)
My TRAP has a nice whistle to it. At first, it was very supercharger-like. After I got my new LS6 intake manifold (and I'm sure they moved the TRAP doing it), it's more of a very low whine on part-throttle accel...
Definately can't hear it at WOT. :D
Definately can't hear it at WOT. :D
Racer
Joined: Sep 2003
Posts: 256
Likes: 0
From: San Antonio Tx
Re: Whistle on acceleration??? (DUCMAN)
Here's a service bulletin on a similiar problem:
WHISTLE NOISE FROM INTAKE MANIFOLD/THROTTLE BODY
This is a technical service bulletin for repair of this problem, it is not a recall. It covers 2001 Corvettes LS1, LS6 engines. TSB # 02-06-01-021
Some owners may comment on a whistle noise coming from either the intake manifold or the throttle body. The noise is most noticeable between 1100 and 2000 RPM.
This bulletin calls for replacing the intake manifold.
WHISTLE NOISE FROM INTAKE MANIFOLD/THROTTLE BODY
This is a technical service bulletin for repair of this problem, it is not a recall. It covers 2001 Corvettes LS1, LS6 engines. TSB # 02-06-01-021
Some owners may comment on a whistle noise coming from either the intake manifold or the throttle body. The noise is most noticeable between 1100 and 2000 RPM.
This bulletin calls for replacing the intake manifold.
Pro
Joined: Mar 2002
Posts: 650
Likes: 0
From: peabody ma
Re: Whistle on acceleration??? (Umrswimr)
I had the same problem in my 97 brought it to the dealer 3 times and they never fixed it, I ended up switching air filters from the K&N cone I had to the black wing and I never heard it after that. :confused:
