Delete,
Actually, the placement of the cg matters more on a symmetrical ball than it does on an asymmetrical ball. On a symmetrical ball, the cg affects where the second preferred spin axis is located, unlike on asym's, where the second PSA is determined primarily by the core.
Also, the ratio of the topweight to the weight of the ball is not a very useful way to characterize the potential effect of the cg. What matters is how much leverage is produced by the cg. Leverage is a function of the mass on the end of the lever--the topweight--and the length of the lever. One ounce on a 15lb. ball with a low average rg will have more of an effect than one ounce on a high rg ball. So, it matters how the 15lbs. are distributed relative to the center of the ball.
From the Ebonite website:
"The minimal effects of static weights stem from their limited leverage. One ounce of static weight equals 1/64th of an inch from the geometric center of the ball. The furthest that the center of gravity can be from the center of the ball at maximum ABC limits is 3/64th of an inch.
Now compare this to the radius of gyration limits. On the low side of ABC limits is 2.43. This means that the mass displacement is 2.43 inches from the geometric center of the ball. The upper limit is 2.80 inches. Sounds to me like a bigger lever arm compared to 3/64th of an inch. You can alter your ball motion much greater by changing RG's than static weights."
Notice that the word "minimal" is used--not zero.
To answer the original question, the effect (though small) of swinging the cg counter-clockwise from the pin, all else equal, is to make the ball rev sooner/ use its energy faster. A common way of describing the effect is to increase midlane read. Whether or not this results in more overall hook depends on the lane condition. If the pattern is long, for example, earlier revs could increase hook by keeping the ball from sliding past the breakpoint. On the other hand, if the pattern is short, then earlier revs could cause the ball to burn up, decreasing hook.
In any case, the effect of the cg is minimal and not nearly as important as placement of the pin.
CK
