[DML] Re: factoid

["Dave Swingle" <swingle@xxxxxxxxxxx>]

Not necessarily. Cam timing, lift, duration, and overlap can impact 
the cranking-speed compression quite a bit. You cannot draw a direct 
relationship between compression ratio and compression in pounds PSI 
except between identical engines. Identical in bore, stroke, and cam 
timing. 

Dave Swingle

--- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> 
wrote:
> 
> 
> I was just wondering how a crate engine compared to Volvo spec.
> 
> My Renault block blows around 170 PSI, so it obviously is 9.5ish:1.
> 
> Bill Robertson
> #5939
> 
> >--- In dmcnews@xxxxxxxxxxxxxxx, "Warren Wallingford" <warren@xxxx> 
wrote:
> > 
> > I can't recall testing a new one.  Bill says that 145 psi a good
> number on
> > an engine that has been broken in.  It is more important that the
> readings
> > be nearly the same than what the actual measurement is.
> > Warren at DMC
> > 
> > 








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