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RE: RE: Inlet manifold problem/question



if you decided to air-shroud the injectors, you must also add the 2nd (or
lower) injector insert as well!!  it all works together.  the manifold MAY
already have them in there, but make sure to check.

chris
86 16V scirocco


> -----Original Message-----
> From:	Ewan Hopkins [SMTP:ewanhopkins@hotmail.com]
> Sent:	Thursday, March 04, 1999 11:58 AM
> To:	Chris Coracini; ewanhopkins@hotmail.com; scirocco-l@scirocco.org
> Subject:	re: RE: Inlet manifold problem/question
> 
> 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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