New rules: Balance holes vs PSA shift

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snick
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New rules: Balance holes vs PSA shift

Post by snick » February 20th, 2019, 8:12 am

The spirit of the 2020 equipment rule changes is to limit post-drilling core dynamics with the stated goal of stabilizing the oil pattern.


If this is true, why is it still legal to shift the PSA on asymms to a position that causes the ball to hook much earlier, while balance holes that do precisely the same thing are illegal?

Seems to me that savvy drillers will simply move their customers to strong asymms with low angle sum/ratio, and we remain with exactly the same rapid pattern depletion scenario as before, and possibly even worse due to the aggressive covers typically used on asymms.
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Re: New rules: Balance holes vs PSA shift

Post by TonyPR » February 20th, 2019, 12:36 pm

Exactly, and asymms are much more expensive than symmetrical balls. I believe there may be some hidden reasons to this rule...

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Re: New rules: Balance holes vs PSA shift

Post by snick » February 20th, 2019, 8:39 pm

One of the ancillary benefits of the new rules is that pin->CG distance, asymm CG offset, and top weight are more or less irrelevant. No more junk balls with short pin and high top, which is a boon to distributors and manufacturers.
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Re: New rules: Balance holes vs PSA shift

Post by DarkHorse » February 20th, 2019, 10:03 pm

My understanding is the elimination of balance holes is to keep drilled bowling balls closer to the designed differential limit of 0.060. By keeping the drilled differential lower, they can reduce potential track flare, and sustain the oil patterns that way.

Everything I've read from USBC leads me to believe that they don't know how balance holes work. If you believed them, balance holes are only used to make a ball flare more. I assume that's just an issue with their Marketing/PR departments.
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Re: New rules: Balance holes vs PSA shift

Post by snick » February 21st, 2019, 4:07 am

There is definitely a disconnect between reality and the rule changes.
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