[urq] 2b relocate Alternator 'Siren' Noise?

[Mike Sylvester]

I started my engine (3b) for the 1st time yesterday and I didn't get any
noise from my driver's side mounted alt.  I'm using the alt and bracket
from a 7A.

Mike

www.urq20v.com

> -------- Original Message --------
> Subject: Re: [urq] 2b relocate Alternator 'Siren' Noise?
> From: Louis-Alain Richard <larichard at plguide.com>
> Date: Wed, September 02, 2009 1:27 pm
> To: "'Brandon Rogers'" <brogers at terrix.com>, "'fdekat'"
> <fdekat at sentex.net>, <urq at audifans.com>
> 
> 
> Quick questions : 
> 
> - Isn't the urQ alternator a reversed cooling flow unit (from rear toward
> front)?
> - Do you have the noise with the special urQ fan, the one with the blanked
> surface ?
> 
> Louis-Alain
> 
>  
> 
> -----Message d'origine-----
> De : urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] De la part
> de Brandon Rogers
> Envoyé : 2 septembre 2009 11:47
> À : 'fdekat'; urq at audifans.com
> Objet : Re: [urq] 2b relocate Alternator 'Siren' Noise?
> 
> So it sounds like you are getting it, too, yes?  It was loud on my car -
> drowned out the engine noise.  I never solved it- we figured out it was
> coming from the alternator "fan" - not sure why it would siren there but not
> in stock location - I'm thinking due to proximity (and only partly shielded
> by) the valence.  But I don't know.  So yeah - never found a solution that
> involved keeping that part.  I ended up working with Apikol to design a
> bigger intercooler that allowed the alternator to stay in stock location....
> 
> Keep us posted -
> 
> Brandon  
> 
> -----Original Message-----
> From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf
> Of fdekat
> Sent: Wednesday, September 02, 2009 3:33 AM
> To: urq at audifans.com
> Subject: [urq] 2b relocate Alternator 'Siren' Noise?
> 
> 
> 
> Say...  
> 
> Did anyone that has the 2B alternator 'relocation kit' (that relocates to
> below the AC compressor) ever figure out the 'siren noise'
> 
> I think I remember someone saying that it was making a 'siren' noise, and
> may be caused by the proximity of the alternator to 'something'.
> 
> There is a fair similarity between the construction of a mechanical siren,
> and the structure of the alternator. 
> 
> I did find that if I covered the air intake on the rear of the alternator
> when it was running, there was a significan reduction in the 'siren' sound.
> 
> I was thinkning next of installing the plastic 'air duct' that come on some
> 5Kt alternators, to see if that makes any difference, but was wondering if
> any had any other sucess or tricks to help reduce the noise?
> 
> -Frank de Kat-
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