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General Category => Drilling & Layouts => Topic started by: FastTracker33 on August 28, 2008, 04:08:41 AM

Title: Drilling through the Mass Bias question
Post by: FastTracker33 on August 28, 2008, 04:08:41 AM: Hey guys, I have a friend who just got an Ebonite NVD drilled, and the thumb was drilled through the MB. He showed some guys the ball (just to show them, not saying there's anything wrong with it), and these 2 guys said that since the MB is drilled through, the NVD is now symmetrical.

Now, I tend to disagree.

Is this true what these guys told my friend about his NVD?
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-Brian
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Title: Re: Drilling through the Mass Bias question
Post by: RSalas on August 28, 2008, 12:19:35 PM: No.
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Title: Re: Drilling through the Mass Bias question
Post by: FastTracker33 on August 28, 2008, 05:23:27 PM: See, I knew I was smarter than a local, retired PBA pro!!
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-Brian
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Title: Re: Drilling through the Mass Bias question
Post by: shelley on August 28, 2008, 05:43:56 PM: quote:
Technically, The Spike core is symetrical anyhow.

Umm, maybe we're not looking at the same picture.

SH
Title: Re: Drilling through the Mass Bias question
Post by: Dan Belcher on August 28, 2008, 06:13:49 PM: .030 mass bias rating, and per ebonite.com "The NVD has a new core design, Spike Core Version 1A which provides a lower RG, high flare potential and a stronger mass bias rating." That's bigtime asymmetrical.
Title: Re: Drilling through the Mass Bias question
Post by: pocketsmasher51582 on August 28, 2008, 06:20:33 PM: hello guys and gals I am the guy who FastTracker33 speaks about that has the NVD.

Here is the Pic of the ball that was layed out by Chris Forry from Buddies Pro Shop.

http://i131.photobucket.com/albums/p291/yankeefan51582/Bowling%20Balls/Ebonite_NVD.jpg
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- Joe

Smashin pockets since '99.

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Title: Re: Drilling through the Mass Bias question
Post by: themachine300 on August 28, 2008, 06:34:11 PM: To me, its all relative to your axis. If a 80 degree mass bias puts it in your thumb, then you still have an 80 degree mass bias. For some bowlers it will go through the thumb, for others it won't.
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Edited on 8/28/2008 6:35 PM
Title: Re: Drilling through the Mass Bias question
Post by: Dan Belcher on August 28, 2008, 07:37:22 PM: quote:
Tornado has MB rating of .003. Is that asymetrical? Every ball has an MB rating.
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.003 is barely asymmetric t all. .030 on the other hand is one of the higher mass bias differentials on the market. (The Morich Ntense LevRG is .036 for comparison). It's an asymmetrical core no matter what you heard before.
Title: Re: Drilling through the Mass Bias question
Post by: dizzyfugu on August 29, 2008, 04:07:44 AM: It is not the question if the core is symmetric or asymmetric by appearance - that's just the looks. It is about the mass bias strength. You can have funny asymmetrical cores (remember the Propeller Core in Ebonite's TPC series?), but they have a low MB rating and create not more effect than a simple symmetrical core.
On the other side, you can shift core densities and create a strong mass bias through the inner weight distribution that is not truly visible through the core's shape.

Anyway, how high a RG asym. diff. rating has to be to become an effective force, I am not sure. IMHO a rating of 0.012 and more creates significant power, and anthing above 0.020 is a "true" strong MB piece - but that's just from personal experience.
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