Throttle Body Whistle?

[Brombones]

After getting the supercharger installed, I have noticed a distinct whistle/squeal coming from the car. Only happens between 1500-2000 rpms. Any higher or lower and it goes away. Took it to the shop today and was told it was the throttle body whistling at that range. The problem is, the sound is as annoying as all hell and I want to remedy it.

Anybody have the solution to this? I haven't been able to find one.

Much appreciated.

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[Cobra Jet]

found this:
https://www.mustang6g.com/forums/threads/strange-whipple-noise.55387/

 

[Brombones]

found this:
https://www.mustang6g.com/forums/threads/strange-whipple-noise.55387/

Thanks. Saw that too. I wonder if this applies to a centri supercharger as well. Always something. The joys of car modding!

Thanks for helping.

 

[brucelinc]

Mine makes a whistle noise at idle but only when temps are cold. I had the whistle last winter but during the summer it was gone. Now that temps are in the 20s and 30s, it has come back. Once the engine warms up, it no longer does it. At first I thought it was an idler or maybe the belt but I really have no idea.

 

[Brombones]

Mine makes a whistle noise at idle but only when temps are cold. I had the whistle last winter but during the summer it was gone. Now that temps are in the 20s and 30s, it has come back. Once the engine warms up, it no longer does it. At first I thought it was an idler or maybe the belt but I really have no idea.

Mine does it regardless if the car is warm or not. Only between that 1500-2000 rpm range. Incredibly annoying, sounds like a squeaky belt but it isn't. I have had other supercharged cars that didn't make this noise.

 

[WildHorse]

Certain belts/pulley combos will whistle. Trapping air between the belt and pulley.

 

[Brombones]

Certain belts/pulley combos will whistle. Trapping air between the belt and pulley.

Would that occur at certain rpm levels or constantly?

 

[WildHorse]

Would that occur at certain rpm levels or constantly?

Varies with RPM. 4-71 & 6-71 blowers are notorious for it.

 

[Jackson1320]

After getting the supercharger installed, I have noticed a distinct whistle/squeal coming from the car. Only happens between 1500-2000 rpms. Any higher or lower and it goes away. Took it to the shop today and was told it was the throttle body whistling at that range. The problem is, the sound is as annoying as all hell and I want to remedy it.
Anybody have the solution to this? I haven't been able to find one.

Much appreciated.

Any chance you could post a video of the issue. A lot of centrifugal head units will whistle at different rpms depending on pulleys

 

[Andrew@Lethal]

Post a video of the noise we would be able to help you out figure out the problem better.

 

[Brombones]

I'll get one today. Thanks all.

 

[Brombones]

As requested. You can hear the whistle starting around the 12 second mark.

 

[brucelinc]

Wow....that would be annoying. Hopefully, someone can help diagnose it.

 

[Brombones]

Wow....that would be annoying. Hopefully, someone can help diagnose it.

You have no idea. Annoying to the point where I don't want to drive the car.

 

[Rapid Red]

Varies with RPM. 4-71 & 6-71 blowers are notorious for it.

I agree, that's not the throttle body .

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