From: markrock_REMOVE_368878_THIS_@yahoo.com
Duke:
<You end up with ... 110 degree inlet centerline and 118 degree
exhaust centerline for 114 degrees overlap.>
Actually you don't. The Intake and Exhaust centerlines do change,
but the 114 that results is the Lobe Separation Angle. It went up
(i.e. got wider--i.e. moved the lobes apart) from the stock 106, and
thus decreased the overlap.
The overlap numbers depend on whether you are measuring at .005" lift
or at the standardized .050" lift.
The Chevy Power Manual specifications do not indicate whether they
are measured at .005" or .050" lift.
Jim Reardon and I have calculated that, assuming the Power Manual
specs are .050" measurement numbers, the overlap decreases from 64
degrees to 48 degrees.
If anybody has or can get a cam specification card for the production
camshafts, we would be most appreciative!! Paul?
Mark
[This is message #10384 by user markrock on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]