RE: Inlet manifold problem/question

["Chris Chemidlin" <spredhaus@hotmail.com>]

FWIW, This is the same head on my 84 GLI. It has the air shouds (plastic 
inserts that screw into the head), but uses the '1 seal' style injector.  
I *think* this is the only year of its type VW-wise.  It is NOT listed 
on the VW microfiche! 


CHRIS CHEMIDLIN
http://www.spredhaus.com
http://www.angelfire.com/nj/spredhaus
58 Type1 Ragtop
84 Jetta uGLi




>
>that's interesting because i remember a thread a while back about how 
some
>cars had the air-shroud system and lower insert but DIDN'T have the
>air-shroud on the injector.  maybe VW had some overlap in production?
>coincidentally, i believe it was an 83 or 84 scirocco...  hmm...
>
>chris
>86 16V scirocco
>
>
>> -----Original Message-----
>> From:	T Berk [SMTP:tberk@mindspring.com]
>> Sent:	Thursday, March 04, 1999 1:34 PM
>> To:	Chris Coracini
>> Cc:	'Ewan Hopkins'; scirocco-l@scirocco.org
>> Subject:	Re: Inlet manifold problem/question
>> 
>> Chris,
>> 
>> This sounds an awful lot like my '84 GTI head I have in my '81. On 
the
>> back of the head is a small rubber hose that joined to the air intake 
in
>> another life. Prior to or after the TB I forget ( I have a premortem
>> diagram somewhere ), but it currently is connected to the smaller of 
the
>> two valve cover ports, just because it fit.
>> 
>> On the back side of the head this rubber hose is connected to a small
>> 'plastic' junction that disappears into the head.
>> 
>> Might this '84 GTI head have an air shrouded injector setup? 
>> 
>> When I pulled the injectors during the swap and to replace the seals 
I
>> did not notice any extra bits on them, in fact I first had the old 
1.6's
>> FI in there and they fit all fine. I never bothered to back the
>> injectors seat out for inspection.
>> 
>> tia,
>> TBerk
>> 
>> 
>> Chris Coracini wrote:
>> > 
>> > 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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