re: RE: Inlet manifold problem/question

["Ewan Hopkins" <ewanhopkins@hotmail.com>]

Thanks for that.  I did notice that the other engine had the caps on the 
injectors.  Mine, being my original injectors, don't.  I couldn't use 
the audi injectors as the union threads were different.  I think I'll 
try fitting caps and hook-up the common airway to that rubber connector.  
I'll maybe get another look at that engine tonight and pull one of the 
injectors for a closer look.

Cheers,

Ewan.


>From: Chris Coracini <Coracin@usdl.com>
>To: 'Ewan Hopkins' <ewanhopkins@hotmail.com>, scirocco-l@scirocco.org
>Subject: RE: Inlet manifold problem/question
>Date: Thu, 4 Mar 1999 10:12:31 -0500
>
>this sounds awfully close to the way the injectors are set up in the 
16V
>sciroccos.  there is a common air "tunnel" that connects the injectors.
>this is an "air shrouded" engine.  the air-shroud system consist of an 
extra
>little cap stuck on the end of each injector with a sealing O-ring.  
this
>lower O-ring seals against a lower injector insert, also only common to 
this
>type of engine.  the air passage way connects all the injectors
>together....somehow...  the purpose is for better atomization of the 
fuel at
>lower rpms.  i'm 90% sure of it.  yeah, that's the ticket...  
>
>chris
>86 16V scirocco
>
>> -----Original Message-----
>> From:	Ewan Hopkins [SMTP:ewanhopkins@hotmail.com]
>> Sent:	Thursday, March 04, 1999 10:00 AM
>> To:	scirocco-l@scirocco.org
>> Subject:	Inlet manifold problem/question
>> 
>> This is to anyone who has experience with the type of manifold on the 
>> early audi 2.0L engines, i.e. with injector seats in the manifold and 
>> not in the head.
>> I have an audi 80 2.0 engine ('92 UK)with this type of head.  There 
is a 
>> channel which links all the injector seats with a hose connector at 
the 
>> TB end of the manifold.  On my engine it is covered with a plug. The 
>> plastic injector seats have holes which appear to allow air flow down 
>> between the seat and the injector, via this common channel.  Just the 
>> other day I saw another audi 80 engine with the same common channel, 
but 
>> in this case there is a hose which plugs in to the bottom of the 
rubber 
>> joint (can't remember what it's called) just before the TB, i.e. it 
>> bypasses the TB.
>> 
>> Does anyone know what this is supposed to do?  I though I saw 
something 
>> about cooling the injectors but I'm not sure. There is no Haynes 
manual 
>> for that series of Audi so I'm stuck for information about the 
engine.  
>> I do have a problem with slight pinking if I've been stuck in a 
traffic 
>> queue for a long time, which always goes once I get going again.  I 
>> don't know if maybe this has something to do with that.
>> I'd appreciate any help on this.
>> 
>> TIA
>> 
>> 
>> 
>> 
>> Ewan Hopkins...
>> 
>> '85 Storm 2.0
>> '86 GT 1.8
>> 
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