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Author Topic: Symmetrical core for heavy oil?  (Read 2122 times)

dougb

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Symmetrical core for heavy oil?
« on: August 26, 2009, 05:23:18 PM »
Looking over the latest line-up, it doesn't look like Storm is producing a heavy oil ball with a symmetrical core (they have the VG and the Dimension).  Maybe the last one they produced was the T-Road Solid, and I heard from some that ball was not a true heavy oil ball.  Am I right in all of this?  And if I am, why doesn't Storm have a symmetrical heavy oil ball?
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jorr19

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Re: Symmetrical core for heavy oil?
« Reply #1 on: August 27, 2009, 01:35:55 AM »
dimension is symmetrical i believe
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pegleg42090

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Re: Symmetrical core for heavy oil?
« Reply #2 on: August 27, 2009, 02:17:47 AM »
dimension
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dizzyfugu

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Re: Symmetrical core for heavy oil?
« Reply #3 on: August 27, 2009, 02:35:09 AM »
Go with a Dimension, pin under fingers, CG at 45° to PAP w. balance hole, and maybe take the surface to 800 grit or even 400 - if this does not work on heavy and long oil, probably nothing will - or you might have to look elsewhere.
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dizzyfugu

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Re: Symmetrical core for heavy oil?
« Reply #4 on: August 27, 2009, 04:05:22 AM »
With your rev rate, I'd think it would be O.K., even though it looks as if you have a medium track. The Dimension just has a more powerful core that promotes roll and makes for an earlier breakpoint, so I'd say it is a step up from the Furious. But IMHO you should also get along with the "weaker" ball, since you can tune a lot by surface changes.
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icewall

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Re: Symmetrical core for heavy oil?
« Reply #5 on: August 27, 2009, 06:36:16 AM »
quote:
even though it looks as if you have a medium track.


what does that have to do with anything?
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dizzyfugu

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Re: Symmetrical core for heavy oil?
« Reply #6 on: August 27, 2009, 06:52:03 AM »
The lower the track, the further the ball tends to skid. The ball tends to spin, instead of rolling. It takes by tendency longer to get into a stable roll - and that's what you effectively want to make the ball finish and "hit hard".
On higher oil volumes and long patterns, this can become an issue, so that a lower RG and a higher differential (as well as a mass bias influence from an appropriate core) can help and improve the ball's performance.
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xxxxxxxxxxxx MR300

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Re: Symmetrical core for heavy oil?
« Reply #7 on: August 27, 2009, 11:07:21 AM »
Dimension

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dougb

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Re: Symmetrical core for heavy oil?
« Reply #8 on: August 27, 2009, 11:34:15 AM »
Thanks everybody.  I mistakenly thought the Dimension was asymmetric!
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dizzyfugu

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Re: Symmetrical core for heavy oil?
« Reply #9 on: August 28, 2009, 02:57:24 AM »
quote:
Thanks everybody.  I mistakenly thought the Dimension was asymmetric!


Well, in fact, it is asymmetrical. But you have to check whether such a ball/core has a considerable mass bias to exploit through drilling or not. That's two pairs of shoes.

The core's shape does not say much about its reaction properties and drilling options. And while the Dimension core looks asymmetrical, it "behaves" just like a low mass bias core - unlike the Shape Lock cores in rthe high end pieces.

Best example is the Propeller Core from Ebonite's TPC series a couple of years ago - one of the wackiest things ever hidden in a bowling ball. But despite its daring looks, it was or behaved just like a "normal" ball, because its mass bias was very low.
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