2.3 head vs. 2.2 head

[Ben Swann]

I stand corrected by Huw as I neglected to mention that detail.  The NG and
NF heads are similar in valve configuration.   However, the NG Head requires
a special 2-peice intake manifold where the injectors are mounted in the
manifold itself, as opposed to most of the other heads where the injectors
are seated directly into the head.  This should also allow easier mounting
of a fuel rail for EFI than the head mounted injectors.

I am fairly certain that the NG configuration  also provides better flow
characteristics than the NF head due to the manifold design.  The intake
works to channel the air and fuel directly into the intake valve, and across
the CC almost like a crossflow head.  I may be corrected on this, but after
dealing with the different styles, that is what I conclude based on my
observation.

This has nothing to do with throttle body size or position and AFAIK they
can use the same TB.

Ben

[Date: Tue, 24 Feb 2004 14:47:06 -0500
From: "Denis Julien" <sparkplugvw at hotmail.com>
Subject: Re: 2.3 head vs. 2.2 head
To: <quattro at audifans.com>
Message-ID: <BAY8-DAV41IkLeoOWGM00000b45 at hotmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Ok i see. The problem is to cut and weld the intake to fit trottle body in
the right direction. So it ll breath better... right ?

Denis J
----- Original Message ----- 
From: "Huw Powell" <audi at humanspeakers.com>
To: "Ben Swann" <benswann at comcast.net>
Cc: "Denis" <sparkplugvw at hotmail.com>; <quattro at audifans.com>
Sent: Tuesday, February 24, 2004 2:39 PM
Subject: Re: 2.3 head vs. 2.2 head


>
>
> > Yes - bolts right on.  That is what I'll be doing.  You need to procure
the intake however.
>
> If it's a head from an engine with the 2 piece IM, yes (NG and some
> later NF's).  The early NF head uses the same IM as most of the other
> I-fives.
>
> > [Do the 2.3 head bolt on MC block ? (i think NO)
>
> -- 
> Huw Powell
>
> http://www.humanspeakers.com/audi
>
> http://www.humanthoughts.org/]
>