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RE: 18V head on pre-18V motor?

To: larry.g.unger@lmco.com
Subject: RE: 18V head on pre-18V motor?
From: "Scott Gardner" <gardner7@pilot.infi.net>
Date: Thu, 2 Apr 1998 16:22:18 +0000
> Andy Ramm wrote:
> 
> > Is it OK to put a pre-18V head on a non 18V motor?
> > I assume pushrods and tappets would have to be
> > changed, anything else?
> 
> Based on the subject line of your message, I assume your asking about
> fitting a 18V head to a pre-18v
> engine.  In additon to the pushrods and tappets, you
> will need to add the cut-outs, for the exhaust valves,
> to the block face.
> 
> Safety Fast! ... larry.g.unger@lmco.com
> '61 MGA 1600 MkII
> 
You will also need to fit the pre-18v pistons, since the combustion 
chambers of the 18V head are smaller than the old head.  If you used 
the old pistons, you will probably end up with an unworkably high 
compression ratio.
Scott

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