3b aan heads same

[feelstranger]

Great, thanks all


--------------------------------------------------
From: "Bernie Benz" <b.benz at charter.net>
Sent: Thursday, September 09, 2010 11:17 AM
To: "Nathan Winters" <natewin at yahoo.com>
Cc: "200q20V mailing list" <200q20v at audifans.com>
Subject: Re: 3b aan heads same

> Further to Nathan’s correct explanation, the base casting for both 3B
> and AAN is the 7A head.
> With the addition of 3 holes for the external water manifold, it can
> and has been be used for either.
>
> Bernie
>
>
> On Sep 9, 2010, at 7:41 AM, Nathan Winters wrote:
>
>> AFAIK:
>>
>> AAN head has some tapped bosses on the front of the head for a cam
>> position
>> sensor.  That sensor is used for timing instead of having a
>> distributor on the
>> AAN.  The AAN has the hole for the distributor, Audi just puts a
>> cover on it,
>> you can put a distributor in if you want.
>>
>> You can use a 3B head on a AAN block by welding on a tapped boss in
>> the proper
>> location.
>> You can use an AAN head on a 3B block by just bolting in a
>> distributor.
>>
>> So, almost identical.  Interchangeable from AAN > 3B block direct,
>> just put in a
>> distributor.  Almost interchangeable 3B > AAN (requires some
>> modification).
>>
>>
>>
>>
>> ----- Original Message ----
>> From: feelstranger <feelstranger at hotmail.com>
>> To: 200q20v at audifans.com
>> Sent: Thu, September 9, 2010 10:09:40 AM
>> Subject: 3b aan heads same
>>
>> Folks, just cross checking my info with the list wisdom - AAN and
>> 3B heads are
>> interchangeable, correct?
>> Are they identical, or just interchangeable?
>> Thanks!
>>
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