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Annoying noise from intake 

 

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 Post subject: Annoying noise from intake
Posted: Sat Jan 16, 2010 10:16 pm 
Stock as a Rock
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Age: 48

Posts: 150

Joined: 6th Nov 2009

Ride: AU2 XR8

Location: waroona
WA, Australia

Hi guys,

Here's one for you.

I have an annoying noise coming from my intake - AU2 XR8.

I have ported the upper/lower, and have also modded the MAF (kostecki CNC shaved that internal spine). But now have noticed this annoying noise.

Could it be becuase of the change in the vortex characteristics that is making this? It only happens at idle, and if i blip the throttle it goes.

Another reason may be the K&N filter may need changing (yes, i have cleaned it) as it is about 5 years old.

any takers?
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 Post subject: Re: Annoying noise from intake
Posted: Sat Jan 16, 2010 10:18 pm 
Stock as a Rock
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Age: 48

Posts: 150

Joined: 6th Nov 2009

Ride: AU2 XR8

Location: waroona
WA, Australia

...its like a humming noise
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 Post subject: Re: Annoying noise from intake
Posted: Sun Jan 17, 2010 12:02 am 
Tyre Shredder
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Posts: 341

Joined: 5th Dec 2009

Location: Perth
WA, Australia

what do kostecki think it is?
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 Post subject: Re: Annoying noise from intake
Posted: Mon Jan 18, 2010 11:38 am 
Stock as a Rock
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Age: 48

Posts: 150

Joined: 6th Nov 2009

Ride: AU2 XR8

Location: waroona
WA, Australia

I took the filter out, and drove around (quite lightly mind you), and it didn't do it. Its the filter me thinks. Either that or lack of the filter may have changed the vortex again.

I will have to try a new filter. May need replacing anyway - 5 years old.
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 Post subject: Re: Annoying noise from intake
Posted: Thu Jan 21, 2010 1:56 pm 
Getting Side Ways
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Age: 39

Posts: 1886

Joined: 26th Nov 2006

Gallery: 7 images

Ride: EL XR8, '08 Mondeo XR5t

Power: 205 rwkw

Location: Perth
WA, Australia

It could very well be just the volume of air that is flowing at idle with the air filter in passing something and creating the noise, just at that point. Maybe a new filter will flow slightly differently, enough to change the velocity so you don't get the noise. Then again, it may not.

Do you have a standard throttle body? I have an aftermarket one which is known to cause a whislte at idle, and that it does! It's just a matter of smoothinig the edges around the isc ports but I haven't gotten around to it yet. If yours is aftermarket, this could be your problem as well.

 

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 Post subject: Re: Annoying noise from intake
Posted: Thu Jan 21, 2010 2:04 pm 
Parts Gopher
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Age: 33

Posts: 68

Joined: 19th Oct 2009

Gallery: 8 images

Ride: BA MKII DEVIL R XR8

Power: 257 rwkw

Location: singleton
NSW, Australia

probably just the filter. Try a new 1 probably 1 2 me goldens been sucked in, in it's travels :)

 

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