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Supercharger Whine


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#1 Gadget2

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Posted 22 July 2020 - 04:11 PM

Hi, 

The noise whine from my supercharger is good, but really loud. At Blyton I trip the meter at 93db, so am loath to go to other tracks such as Bedford, only to be kicked off because of the whine. Exhaust noise is no worries, passing ok at Cadwell static check.

 

How can I reduce this whine (other than taking my right foot off the pedal), still keeping the power delivery?

 

Would a different air filter help (I use a pipercross cone filter)?

 

Any suggestions gratefully recieved. 



#2 cwhite2

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Posted 22 July 2020 - 04:28 PM

Not really qualified to answer this (being a turbo guy) but I met a couple of lads at the weekend with supercharged cars and they said that the air filter makes a big difference. 



#3 smiley

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Posted 22 July 2020 - 04:38 PM

Yes, open cone is the worse, regardless of type.

You need an enclosed box.

Most silent is oem filterbox.

 



#4 The Batman

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Posted 22 July 2020 - 05:16 PM

itg enclosed airfilter is perfect thumbsup



#5 EnnZett

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Posted 22 July 2020 - 05:49 PM

Concerning this problem:
 
How to modify and build-in the OEM filterbox? 
 
I have just converted to SC and there are problems to accommodate the original box. Because of the tight space it also seems difficult (for me) to change the filter insert when box is installed.
 
Or do you know another car's OEM box (condition: 70 - 76 mm inlet-diameter) which can be built-in also? I don't know exactly but I think I remember I've read somewhere that a Porsche one could fit.
 
Any hint will be useful.
 
Thanks.


#6 The Batman

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Posted 22 July 2020 - 05:58 PM

https://www.merlinmo...xes-and-filters



#7 C8RKH

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Posted 22 July 2020 - 06:28 PM

Which one is best for a supercharger out of those Joe?



#8 The Batman

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Posted 22 July 2020 - 06:34 PM

im running 430bhp with the largest one on low boost, i was also running this same filter at 260bhp

 

but stab76 will be a direct replacement for the cone filter and maintaining intake pipe thumbsup



#9 C8RKH

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Posted 22 July 2020 - 06:57 PM

Brilliant thanks Joe. Take it I can order from you?



#10 EnnZett

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Posted 22 July 2020 - 07:42 PM

Hallo Joe,

 

may I get an offer for this incl. p&p to Germany?

 

 

 

>>>>>>>>>>norbertzesling@gmx.de


Edited by EnnZett, 22 July 2020 - 07:44 PM.


#11 myles

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Posted 22 July 2020 - 09:24 PM

im running 430bhp with the largest one on low boost, i was also running this same filter at 260bhp

but stab76 will be a direct replacement for the cone filter and maintaining intake pipe thumbsup


Is that the 76mm one?

#12 The Batman

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Posted 22 July 2020 - 09:42 PM

the one im runing is the largest so stab122xl

 

but the stab76 is the 76mm one yeah.

 

I can sort prices out if you all like.



#13 EnnZett

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Posted 22 July 2020 - 10:53 PM

thumbsup



#14 Acidpopstar

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Posted 23 July 2020 - 01:38 AM

I run a drilled Saab box on mine. Cole’s with 300bhp fine and recurs whine massively. Johnyboyhgt did the mod and can advise


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#15 gertje

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Posted 23 July 2020 - 07:32 AM

I use thé OEM one, only Changed i made was thé outlet made it thé same diameter as thé trothle body
And made a extra hold on thé inlet side, also take thé inside cone out
And it's verry quite

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#16 sford

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Posted 23 July 2020 - 07:50 AM

I've got a Stab122xl on mine and it's much quieter than the open cone from before. Not got an issue with noise any more. In fact last time I tested it was 89db apparently although that was Castle Combe so wind was probably blowing in my favour. 



#17 FLD

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Posted 23 July 2020 - 07:56 AM

I wonder if an inlet resonator box would cut this noise out?



#18 EnnZett

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Posted 23 July 2020 - 08:01 AM

@

Acidpopstar

@

gertje

@

sford

 

Thank you very much for your hints.

 

 


Edited by EnnZett, 23 July 2020 - 08:02 AM.


#19 Gadget2

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Posted 23 July 2020 - 10:20 AM

Hi Joe,

 

I knew the .org would help me with my noise problem!

 

Please pm me with cost, payment details and delivery for the stab 76.

 

Many thanks

 

Ian



#20 aquilaproejct

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Posted 23 July 2020 - 10:50 AM

OEM airbox on mine two. Adaptor bracket to shuffle it across about two inches outboard. Quiet as a mouse. Pain to change the filter, but always was anyway.




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