An interesting day! NF/NG swap

[Huw Powell]

> > you need an engine... the NF is the best choice, as you can use your
> > existing intake manifold and CIS parts.
> >
> > the NG uses the funky IM, requiring it's "own" injection lines which
> > were only used on the 87.5 cgt.  (ones from a 100 will probably be too
> > long and end up looking fugly)
>
> As I posted recently, the I5 2.3 NG with the 2-pc intake manifold is also
> found on the 80/90 series in addition to the 87.5 CGT.

(um, yes, doh...!)
>
> Moreover, there are two versions of the I5 2.3 NF engine.  The early ones
> (used on 1987-88 5000 non-turbo) is as you describe -- "old" style manifold
> and head.  However, 89-91 5K non-turbos have the new version of NF that
> has the same style 2-pc manifold and head as the NG.
>
> I propose we clarify this by calling the old style NF-1, and the newer
> style NF-2.  For the purpose of engine swap into a 4Kq, the NF-1 is
> the one desired.

Question... what, if any, is the difference between an "NF-2" and an NG
then?

if none, why don't we just call all the two pc IM 2.3's NG's and let
Audi stew in their silly engine coding system?

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/