What this means, Robert, is that the overhaul on your engine has resulted in
an increase in compression ratio - probably because you fitted oversize (or
less dished) pistons and had the head surfaced as part of the valve job.
But fear not - 150 is roughly equivalent to 8.8 to 1 so you will still be
able to run very nicely on 92 octane premium and you will notice an
improvement in performance.
Lawrie
British Sportscar Center
-----Original Message-----
From: Robert Sexson <rsexson@excite.com>
To: mgs@autox.team.net <mgs@autox.team.net>
Date: Sunday, August 13, 2000 4:49 PM
Subject: Compression preasures
>
>I was looking through my notes and noticed that the compresson preasures
>were 155--150--150--150 [cold] on my overhauled engine. It is a 74.5 low
>compression engine. My manual indicates that the preasures should be 130
but
>doesn't specify hot or cold. Anyone have a ideas about this? TIA
>
>R. Sexson
>74.5 B
>should be 130
>
>
>
>
>
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