2.3 NF block with MC-1 head?

[JShadzi at aol.com]

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


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>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]
>> > > >
>> > > >
>> > > >
>> >
>> >
>