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1380cc verses 1275cc 40 over???

To: mini-list@autox.team.net
Subject: 1380cc verses 1275cc 40 over???
Date: Mon, 14 Apr 2003 18:48:09 EDT
Hello all:
     I need information about the reliability of 1380cc engines based on the 
1275 block.  One source says that since the center two cylinders have less 
metal inbetween adjacent walls the bore expands differentially to form a bit 
of an oval at running temp.  This causes alot of blow-by and hence oil leaks 
and lost power.  Any and all information appreciated so that I can make an 
informed decision as to which way to go with a rebuild.
Thanks!
Ken

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