[Vwdiesel] Head gasket thickness & compression levels

[LBaird119 at aol.com]

In a message dated 6/11/2009 11:37:38 PM Pacific Daylight Time, 
tadc at europa.com writes:

> All else being equal, higher compression should equal higher efficiency, 
> or
> so says the theory

  But there's the point of diminishing returns.  That's the key we 
don't really know.  Same pickup, different engine had the wrong 
head gasket and compression was about 750lbs after it broke in.  
As it broke in (compression goes up) the power went down even 
after turning the pump up a little.  It actually got less power and 
smoked more.  New/good injectors, new rings, rebuilt head, etc.
   Higher compression makes more power and efficiency in a gasser 
because they're so far below the most efficient CR.  I read about a 
project diesel where they took a big Wakushaw diesel and put 
variable CR pistons in it.  Economy and power went way up.
    Loren


**************
Download the AOL Classifieds Toolbar for local deals 
at your fingertips. 
(http://toolbar.aol.com/aolclassifieds/download.html?ncid=emlcntusdown00000004)