2.3 NF block with MC-1 head?

[Mihnea Cotet]

One more 0.02 to add, particularly for Alan, even the american KX/JT 2.2s
that had 8.5:1 CR had the same head as the KV so the head comb chamber
really is identical no matter the CR.

HTH,

Mihnea

At 12:40 20/02/2003 -0500, JShadzi at aol.com wrote:
>Alan, the 2.3 has a compression of 10:1 stock, the 2.2 has a compression
>of 10:1 stock, the comb. chambers in the two heads are identical, there is
>no change of compression by switching to an identical head comb. chamber
>as the one the motor originally had.
>
>Javad
>
>
> >This message is in MIME format. Since your mail reader does not understand
> >this format, some or all of this message may not be legible.
> >--
> >[ Picked text/plain from multipart/alternative ]
> >Just want to confirm my thoughts on this for my turbo project. My engine
> >consists of a kv bottom end (2226) and an ng head (2309), both engines are
> >spec'd at 10:1 compression ratio.
> >KV engine: 81 Bore, 86.4 Stroke
> >NG Engine : 82.5 Bore, 86.4 Stroke
> >So capacity of each cylinder =
> >KV 2226/5 = 445.2
> >NG  2309/5 = 461.8
> >Therefore for both engines to have 10:1 compression ratio, at tdc the volume
> >above the piston must be:
> >KV 445.2/10 = 44.52
> >NG 461.8/10 = 46.18
> >So logic dictates that if the ng head is fitted to the kv bottom, the
> >compression will be lowered: so working on the fact that my 2226 engine now
> >has 46.18 cc above the piston at tdc gives me....
> >2226/5 (capacity of cylinder) = 445.2/46.18 (new volume above piston) =
> >9.64:1
> >Does this follow, or have I missed something, my goal has always been 8psi.
> >my head says yes, but when I posted before no one could back me up.
> >
> >
> >Best Regards,
> >Alan Pritchard
> >Network Administrator
> >
> >Seaeye Marine Ltd.
> >
> >Tel.  01329 289000
> >Fax. 01329 289001
> >www.seaeye.com
> >
> >-----Original Message-----
> >From: Mihnea Cotet [mailto:mik at info.fundp.ac.be]
> >Sent: Tuesday, February 18, 2003 9:45 PM
> >To: duandcc_forums at cox.net; ben swann; JShadzi at aol.com
> >Cc: quattro at audifans.com; benswann at comcast.net
> >Subject: Re: Re: 2.3 NF block with MC-1 head?
> >
> >Oh right, he was talking about making a turbo 2.3 10v.... bad idea indeed,
> >only maximum 5 psi are possible with some very high octane fuel and much
> >retarded ignition timing... However, lowering the CR a tad to say 9.5:1 and
> >a pretty good ignition control system would allow him to have a setup
> >similar to the 20vt... not a very bad idea! I'll try to look into making a
> >9:1 CR 10vt with a good ignition system (accurate is the word, I have the
> >timing values for 20vt engines so transposing these values on the 10v
> >engine won't be the issue, accuracy of the spark control will instead) and
> >a nice turbo as well... sounds like fun anyway!
> >
> >Mihnea
> >
> >At 16:15 18/02/2003 -0500, duandcc_forums at cox.net wrote:
> >>Your right, it's not the head that's the problem, it's the block. NF =
> >>10.1:1, same as my NG. I doubt you could run much, if any, boost through a
> >>10.1:1 CR engine without some pretty sophisticated engine management stuff
> >>(like they use on modern 1.8Ts, gost I miss my chipped passat 1.8T).
> >>
> >>Dave
> >>
> >> >
> >> > From: Mihnea Cotet <mik at info.fundp.ac.be>
> >> > Date: 2003/02/18 Tue PM 03:59:58 EST
> >> > To: <duandcc_forums at cox.net>, ben swann <benswann at comcast.net>,
> >> >  JShadzi at aol.com
> >> > CC: quattro at audifans.com, benswann at comcast.net
> >> > Subject: Re: 2.3 NF block with MC-1 head?
> >> >
> >> > Why would he? The compression ratio is given by the pistons, not the
> >head
> >> > AFAIK..
> >> >
> >> > Mihnea
> >> >
> >> > At 15:40 18/02/2003 -0500, duandcc_forums at cox.net wrote:
> >> > >I'm pretty sure you'd end up with WAY too high of a compresion ratio to
> >a
> >> > >turbo engine...
> >> > >
> >> > >Dave
> >> > >1987 CGT Special Build
> >> > >SE Virginia
> >> > >
> >> > >
> >> > > >
> >> > > > From: ben swann <benswann at comcast.net>
> >> > > > Date: 2003/02/18 Tue PM 01:32:02 EST
> >> > > > To: JShadzi at aol.com
> >> > > > CC: quattro at audifans.com,  benswann at comcast.net
> >> > > > Subject: 2.3 NF block with MC-1 head?
> >> > > >
> >> > > > Javad, Quattrophile,
> >> > > >
> >> > > > Just a thought.  I have an NF block and was looking into the
> >> > > > possibility of installing my MC-1 turbo head to have a 2.3 MC-1
> >setup.
> >> > > >
> >> > > > Can it be done without shaving the head or block? Issues?  Worth it?
> >> > > >
> >> > > > Ben
> >> > > >
> >> > > > [From: JShadzi at aol.com
> >> > > > was -Re: 80tq: Head Gasket Failure
> >> > > >
> >> > > > Just a standard one this time around, this motor is temporary but
> >I'm
> >> > > > researching using the S6 gasket in the 2.3 motor, thought the bore
> >is
> >> > > > bigger.
> >> > > >
> >> > > > Javad]
> >> > > >
> >> > > >
> >> > > >
> >> >
> >> >
> >