[s-cars] Factory POS alternatives?

[Tom Green]

Since you are aware of the connector problem changing from a 3  
channel to a 4 channel POS,
I wouldn't anticipate any other issues.  You should not have expected  
the list to answer in the
narrow constraints of your question, but at least you got some in the  
area. :-)  Here's another-a
cheaper alternative to the OEM Bosch-that I carry for a spare.  It  
also is listed for 2.7t engines.

http://www.partsquick.com/ProductDetail.asp?i=237262:

Tom

> -----Original message-----
> From: David Forgie <forgied at shaw.ca>
> Subject: Re: [s-cars] Factory POS alternatives?
> To: s-car-list at audifans.com
> Message-ID: <cf0cd4565c55c.48934544 at shaw.ca>
> Content-Type: text/plain; charset=iso-8859-1
>
> 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