KZ vs NF, Overbore

[Richard Hoffman]

So far - no MC nor NF/NG blocks are to be found cheap and locally...tryin to
get the cheap - $64 junkyard price ;)  So I'm thinkin improvise!
Thanks for your help!
Richard
1990 CQ 193K
----- Original Message -----
From: <JShadzi at aol.com>
To: <billzcat1 at hotmail.com>
Cc: <quattro at audifans.com>
Sent: Thursday, November 15, 2001 2:23 PM
Subject: Re: KZ vs NF, Overbore


> Yes, they are a simple device, a ball and spring vavle, once oil pressure
comes up the spring compresses and they start squirting the bottom of the
piston.  A hole must be machined down into an oil passage, they are pressed
in, and a hole must be drilled and tapped to fit an allen bolt that keeps
them there.  A lot of work, not worth it when ready to go blocks are around.
> Javad
>
> In a message dated Thu, 15 Nov 2001  1:33:22 PM Eastern Standard Time,
"Richard Hoffman" <billzcat1 at hotmail.com> writes:
>
> > Oh BTW these oil-squirters...where are those located?  I've never been
quite
> > sure about that although I've heard of that on many of the
higher-quality
> > turbo cars.  I know it sprays the bottom of the pistons with oil to cool
> > them...but where are they, how do they work?
> >
> > Richard
> > 1990 CQ 193K
> > ----- Original Message -----
> > From: <JShadzi at aol.com>
> > To: <billzcat1 at hotmail.com>
> > Sent: Thursday, November 15, 2001 6:36 AM
> > Subject: Re: KZ vs NF, Overbore
> >
> >
> > > And don't forget the oil squirters, it won't have those, but they can
be
> > > added, but that starts driving up the cost quite a bit instead of
simply
> > > finding an NF/NG block.  Also, the KZ is machined differently wrt the
way
> > the
> > > AC bracketry bolts up, the NF using the spot where the MC has the
turbo
> > oil
> > > return line.
> > >
> > > Any of the I5 blocks can easily be bored to 83+mm without any
problems.
> > BTDT
> > > with up to 84mm, but that is pushing the block and head gasket surface
to
> > its
> > > max.
> > >
> > > There is nothing that makes the NF different from the KZ in regards to
> > bore
> > > size and cylinder walll thickness, they are identical in that respect,
one
> > > just has had a bigger bore cut out of it.
> > >
> > > Javad
> > > 80tq.com
> > >
> > > In a message dated 11/14/2001 11:59:12 PM Pacific Standard Time,
> > > billzcat1 at hotmail.com writes:
> > >
> > > << In the never-ending quest for knowledge and hp....
> > >
> > >  The main difference between the KZ block and NF block is the bore -
KZ
> > >  smaller at 81.0mm, NF at 82.5mm.
> > >
> > >  What is the maximum overbore a KZ block can take?  Factory lists
oversize
> > >  pistons up to 81.5mm but I was wondering if they could be bored up to
> > 82.5
> > >  to essentially turn it into an NF block.  And then, maybe 83.0mm, the
> > >  factory-spec oversized (2+) pistons.
> > >
> > >  I was thinking that the cylinder walls would be thickest on the KZ
when
> > it
> > >  was stock - then you could bore it up to the NF size for a little
more
> > >  displacement and still have a decent wall in there.
> > >
> > >  I'm sure there are tons of you out there who have had their KZ apart
and
> > >  could probably tell if the block could take 1.5mm overbore.
> > >
> > >  Thanks!
> > >
> > >  Richard
> > >  1990 CQ 193K
> > >   >>
> > >
>
>
>