In a message dated 10/9/05 1:50:07 PM Eastern Daylight Time,
dogzbody1@yahoo.com writes:
<< Can I calculate my compression ratio from a
compression test? Is 165 lbs cranking compression =
11.22: 1 (165/14.7 lbs/in at sea level)?
>>
Can't get there from here with that information. Compression pressure is
affected by cam duration and cam timing.
A few things to try.
Make a accurate measurement from the valve cover rail on the head to the
surface of the head. Or measure from a manifold bolt to the head surface.
Compare these measurements to a stock or known shaved head.
Another method is called a whistler. This is made by Katech
http://www.katechengines.com/corporate_services/whistler.php
and is used by many circle track , drag race tech departments.
Harold
=== This list supported in part by The Vintage Triumph Register
=== http://www.vtr.org
|