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Author Topic: Effects of a pitched Weight Hole  (Read 7813 times)

bowlingmytmouse

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Effects of a pitched Weight Hole
« on: November 07, 2006, 07:07:54 AM »
Hi all,
I was wondering what the pros/cons and/or benefits are of pitching a weight hole.

Thanks in advance,
BMM
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MegaMav

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Re: Effects of a pitched Weight Hole
« Reply #16 on: November 11, 2006, 09:33:53 AM »
ill snag a picture of the ball when i get home, maybe you'll be able to give me an idea if it can be pulled off or not.

if i pitched the x-hole towards the center of grip, it would be angled through the CG, is that the message you're trying to convey?
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JohnP

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Re: Effects of a pitched Weight Hole
« Reply #17 on: November 11, 2006, 08:09:00 PM »
MegaMav -- I'm having trouble understanding this.  If the ball hasn't been drilled yet, lay it out differently so you won't have the problem.  First, confirm the cg location and amount of top weight.  If it's correct, keep the cg within about an inch and a half from the grip center and a reasonably sized balance hole will make it legal.  If it's already been drilled, have the driller weigh it and post the weights and I'll give you a recommendation for location and size of a balance hole to make it legal (if your driller can't do that himself).  --  JohnP

Edited on 11/12/2006 3:30 PM
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MegaMav

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Re: Effects of a pitched Weight Hole
« Reply #18 on: November 11, 2006, 10:56:59 PM »
the problem is, the ball is asymmetric, so there isnt 1 variable to manipulate beside the pin, there is 2, with the mass bias.

ill get a picture up soon, for all to see the puzzle.

i can get my ball driller to verify, but he can be a real scrooge when it comes to doing a little extra work, and i wish i could get a new driller, but hes the best in the area.

i deal with the attitude for great work.
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MegaMav

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Re: Effects of a pitched Weight Hole
« Reply #19 on: November 12, 2006, 10:01:16 PM »
i just put the picture up, of the impulse zone.

http://members.fortunecity.com/megamav/bowling/html/impulse.htm

lets hear it!
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lane1convert

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Re: Effects of a pitched Weight Hole
« Reply #20 on: November 12, 2006, 11:54:58 PM »
quote:
i just put the picture up, of the impulse zone.

http://members.fortunecity.com/megamav/bowling/html/impulse.htm

lets hear it!


I believe you will have some options with that ball.  Not to hijack your post, but how would you feel with a ball that has these specs:  http://www.putfile.com/pic.php?img=3965338  lol  (Pick me, cuz I do!)
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MegaMav

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Re: Effects of a pitched Weight Hole
« Reply #21 on: November 13, 2006, 08:44:52 AM »
its a track ball...

what do you expect.



depends how much the top weight is, could rico it with deep finger holes.
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stormed1

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Re: Effects of a pitched Weight Hole
« Reply #22 on: November 13, 2006, 09:01:01 AM »
The other reason to pitch the weight hole is to avoid the core. I was told by A ball rep to pitch the balance hole 1 1/2 inch right to miss the core and retain the cores dynamics. As you drikk into the core you change it's shape and thereby it's dynamics by changing RG and diff figures
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Greg T

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Re: Effects of a pitched Weight Hole
« Reply #23 on: November 13, 2006, 02:49:43 PM »
quote:
The other reason to pitch the weight hole is to avoid the core. I was told by A ball rep to pitch the balance hole 1 1/2 inch right to miss the core and retain the cores dynamics. As you drikk into the core you change it's shape and thereby it's dynamics by changing RG and diff figures


   This is true if you are only interested in getting back to legal statics. However, drilling the core is a viable way to tune the ball reaction.




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MegaMav

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Re: Effects of a pitched Weight Hole
« Reply #24 on: November 13, 2006, 03:06:31 PM »
how about a verdict on the link i posted last night?

http://members.fortunecity.com/megamav/bowling/html/impulse.htm
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Greg T

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Re: Effects of a pitched Weight Hole
« Reply #25 on: November 13, 2006, 03:24:30 PM »
quote:
how about a verdict on the link i posted last night?

http://members.fortunecity.com/megamav/bowling/html/impulse.htm


  What are you looking for? A specific ball reaction or just getting back to legal?




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MegaMav

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Re: Effects of a pitched Weight Hole
« Reply #26 on: November 13, 2006, 03:47:33 PM »
back to legal would be nice.

3.9 Top Weight

Dad loves this layout, and helps him out with his lack of revs.

when i took it out of the box, i knew it would be a project to make it legal with a leverage layout, without making the MB negative.
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Greg T

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Re: Effects of a pitched Weight Hole
« Reply #27 on: November 13, 2006, 08:09:47 PM »
Without it here in my hands this will be an educated guess. I would move the X hole up about 2" further along the val just so it's about an inch above the CG, and pitch it about an inch away from the palm and towards the thumb. Double check your statics and , if necessary take out some finger weight with deeper finger holes.



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MegaMav

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Re: Effects of a pitched Weight Hole
« Reply #28 on: November 13, 2006, 10:44:48 PM »
even with the CG that low, you're worried about finger weight?

so you're saying close to PAP (5" Over for him) & x-hole pitched towards CG?

Edited on 11/13/2006 11:37 PM
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Greg T

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Re: Effects of a pitched Weight Hole
« Reply #29 on: November 14, 2006, 09:04:54 AM »
I keep ginger weight in my mind because the cg is close to the thumb. The thumb removes a lot of weight. I'm not saying immediately drill the fingers deeper. I said if it turns out that you need to remove finger weight you have that option.

I would say yes. Pitch the hole down, away from the palm, and back towards the thumb.




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JohnP

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Re: Effects of a pitched Weight Hole
« Reply #30 on: November 14, 2006, 10:05:08 AM »
One more time, before you drill the ball confirm the cg location and the top weight.  It is not unusual for the cg to be off by over an inch, and if it is the top weight will also be off (although, usually the top weight is higher than the manufacturer indicates instead of lower).  You may find that you don't have a problem at all.  --  JohnP
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