[s-cars] Factory POS alternatives?

[David Forgie]

Dave:  You might want to check this out:

http://forums.audiworld.com/s4s6/msgs/149771.phtml

The UrS uses two, 3 channel 4A0 905 351A black Bosch POS units
The 2.8L 12V V6s use one brown Hitachi three channel 4A0 905 351 (no "A", brown) POS unit
 (wasted spark system,  two plugs fire at once)
The A4 1.8t use one four channel POS, 4D0 905 351
The V8s use two four channel POSs, 8D0 905 351

So technically the four channel 4D0 and 8D0 POSs wouldn't work.  However, IF you were desparate,
 you could adapt one to your uses.  However, if you were in that situation,  I think you would be better
 to use the brown Hitachi 4A0 905 351.  These can be had in wreckers for cheap. (But only as a spare,
 IMO).

HTH

Dave F. 

----- Original Message -----
From: Robert Myers <bob at chips-ur-s.com>
Date: Friday, August 1, 2008 4:41 pm
Subject: Re: [s-cars] Factory POS alternatives?
To: Dave Ellis <UrS4 at sympatico.ca>
Cc: s-car-list at audifans.com, forgied at shaw.ca

> 
> Dave,
> 
> I'd suggest you think about doing the 1.8t coil/PSO swap ala 
> Dave 
> Forgie.  This involves getting rid of the OEM AAN ignition 
> setup and 
> swapping in coils and integral PSOs for the 1.8t engine.  
> Dave has 
> designed a wiring harness to accomplish this or there are a 
> couple of 
> commercial harnesses available which will also do the job (at 
> more expense)
> 
> Bob
> 
> At 07:18 PM 8/1/2008, Dave Ellis wrote:
> 
> >I haven't looked at the parts in detail yet (waiting for my 
> wife to
> >return with the A4 tomorrow), but I notice that the POS used in the
> >earlier B5 A4 models is similar to the POS used in our AAN 
> engined cars.
> >
> >Anyone know if they are compatible?  Here are the part numbers:
> >
> >S4/S6: 4A0 905 351 A
> >
> >A4:    4D0 905 351 (original p/n)
> >         8D0 905 351 
> (dealer recommended alternate p/n for A4)
> >
> >Thanks!
> >Dave
> >
> >'93 S4
> >'99.5 A4 1.8t
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