[Healeys] 100-4 Piston Depth

[Oudesluys]

You could use custom pistons but you may be able to get away fitting a 
thicker head gasket, e.g. one made from red copper plate ca. 2mm thick, 
using your old gasket as a template and making sure that the gasket will 
not faul the pistons. Check that the all the channels/holes still line 
up between head /gasket/block. Heat the copper plate to cherry red and 
immerse in water first to make it softer.
Kees Oudesluijs


rrengineer @dslextreme.com schreef:
> Can anyone tell me how close you can get the top of your pistons to the top
> of the block?  The bare block I got for nothing that I built my motor from
> does not have the head on it yet.  I am having the head ported and
> polished.  During this process, the polisher asked me to take some modeling
> clay and fill one of the piston tops at TDC and skim the excess off the
> top.  He said to wad up what would fit in this void and he would drop it in
> a measured beaker to see how many CCs it displaced to get an idea of how
> much he could grind out of the combustion chamber in the head.  When I went
> to fill this area with clay I discovered that the piston sits approx. 1/16th
> of an ich ABOVE the top of the block.  This is something I did not notice
> before because none of the pistons were at TDC before.  I'm guessing that
> this will be a problem.  I have no idea how much was cut from the block
> before I got it.  All I had done was a clean-up cut during machining.  Could
> the cheap Moss pistons be too tall?  I'm thinking not, but maybe I'm gonna
> need some custon pistons for this engine.
> Mike MacLean
> 56 BN2
> 60 AN5
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