[TR] [Spits] Spitfire Head

[Jim Muller]

On 28 Dec 2009 at 18:12, Roger Elliott wrote:

> I have an 80 Spitfire...  I would hate to take the head off,
> then find out it was already at 9.0 compression.

My engine is a '76 which means it has 9:1 compression.  It was 
rebuilt some years ago but I wasn't deeply involved in the actual 
work so I can't speak from direct experience.  But I recall being 
told, related to a very different scenario, that the higher 
compression of the '76 engine was all in the head.  Question is, do 
you know the history of your engine?

Can one guess compression ratio by measuring the compression?  I 
recall that mine is quite high, about 160lb or something.  Or are 
there too many other factors?

Wasn't something like this just discussed in a different thread, or 
is my email coming in in reverse-chronological order???

-- 
Jim Muller
jimmuller at rcn.com
'80 Spitfire, '70 GT6+