Quote:
Originally Posted by JWL
Actually the cam is offset from the crankshaft .021 plus or minus .002 on the 46-53 engine block.
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The original 8BA drawings show the camshaft offset to be from .0192 to .0292 offset from the crank, so I "split the difference" and went with .0242 in my cad model. There are some minor differences in the 59x versus 8BA drawings - with the 8BA ones being easier to read.
I will have to test the cam offset at .019 to .023 and see what it does to the valve angles - will be an interesting 3D experiment.
The valve angles shown on the 8BA drawings are 3.38 degrees and 6.23 degrees - though obviously they change depending on the true CAM centerline offset. When I did my CAD model, I let the specific dimensions of the CAD models (off the prints) drive the final dimensioned values - so there will be some variance, due to the various variances in the drawings.