Anyone got any ideas on something that maybe we could wrap around the blower to prevent the whistle from being heard? Sometimes I want to go sleeper, and that blower just doesn't let that happen. Obviously we'd have to be concerned about wrapping up the blower just to end up causing it to run hotter than normal, but I figure there would be a good material to use. Any ideas?

 

Do you still remember what the blower sounds like?

 

Sorta.

 

Is the whistle coming from the blower body or from the CAI (a sucking sound-Not dissing the blower, of course) If the former, the same batting that lines the hood might work. If from the intake, an airbox of some sort might mute it.

 

The rotating blades in the blower make a whistling sound.

 

Having never been under the hood with one, I don't know if you hear more noise coming out of the intake or directly from the blower. Maybe just more sound insulation in the entire engine compartment? It's hard to hide a turbine fan, though.

 

In theory since the sounds is high pitched you should be able to mute it by using a baffling system. High frequency sound is usually very directional. Perhaps adding a tight "S" shaped section with sound absorbent batting inside would muffle the sound. This may reduce the intake flow by adding more of a restriction.

The sound may also be transmitting through the body of the blower. You could attempt to cover the blower, but it would probably overheat.

 

First we have to know how the noise get generated.
This is definitely one of the disadvantage of having centrifugal blower as oppose to anything else.
Centrifugal blower is substantially more noisier than roots or twin-screw type, that is part of the reason why you don't see centrifugal blower on production vehicles.

The source of the noise is the gear drive from the input shaft of the supercharger to the high-speed compressor-wheel shaft. It is a major challenge to make these gears to run quitely. Powerdyne came out with unique blower design to circumvent the noise issue using the belt to drive the gears. But as you have guessed it, belt has to be replaced periodically and as it is driven faster and faster its life gets considerably shorter.

I am afraid to say then, there is no real solution to gear whine with current Paxton blower. No amount of insulation or padding will quite this sucker.

I am sorry to break it to you, Wes.

 

I know that older saabs used to come with some type of a Turbo silencer...I think it had to do with the exhaust...I'll look into it. But this is a turbo..hmm.

Maybe you can create some type of a resonator under the hood

 

Get a subwoofer