Author Topic: How to Raise the Differential???? (Read 6032 times)

Brickguy221 · « **on:** November 03, 2016, 04:01:34 PM »

On a ball with pin under RF and CG out 1 1/2" to 2" what can be done to raise the differential? I am going to drill a ball with a .040 differential and want to increase it.

Wolfstrike · « **Reply #1 on:** November 03, 2016, 04:24:16 PM »

Use a weight hole. Anything from P2 to P4 would work. The closer the weight hole to the thumb the more diff you will add

charlest · « **Reply #2 on:** November 03, 2016, 04:27:17 PM »

Normally on symmetric core, a P3 or a P4 (and Double thumb holes are pretty close) weight hole will increase the drilled core dynamics.

How big a weight hole you can legally drill depends on the starting top weight and how much weight is normally removed by drilling your thumb and finger holes. (mine is 2.25 oz.).

In his case, I wouldn't worry about how much negative side or negative finger or thumb weight you wind up with. One on my most reactive balls wound up with 5/8 negative side and 1/2 ounce negative finger weight. The increased core dynamics overwhelmed those static weights.

charlest · « **Reply #3 on:** November 03, 2016, 04:28:34 PM »

Quote from: Wolfstrike on November 03, 2016, 04:24:16 PM

Use a weight hole. Anything from P2 to P4 would work. The closer the weight hole to the thumb the more diff you will add

I was under the assumption that a P2 weight hole was neutral in its effect on dynamics ...

TWOHAND834 · « **Reply #4 on:** November 03, 2016, 04:56:18 PM »

Quote from: charlest on November 03, 2016, 04:28:34 PM

Quote from: Wolfstrike on November 03, 2016, 04:24:16 PM
Use a weight hole. Anything from P2 to P4 would work. The closer the weight hole to the thumb the more diff you will add

I was under the assumption that a P2 weight hole was neutral in its effect on dynamics ...

That is correct. P3 and P4 are differential increasing weight hole locations.

Brickguy221 · « **Reply #5 on:** November 03, 2016, 05:35:01 PM »

Thanks guys ... I am going to get a 12# Motiv Primal Fear drilled tomorrow or Sat and the starting differential on it is .040 and I require more differental than some people do.

http://www.motivbowling.com/products/balls/primal-fear.html

charlest · « **Reply #6 on:** November 03, 2016, 06:47:47 PM »

Quote from: Brickguy221 on November 03, 2016, 05:35:01 PM

Thanks guys ... I am going to get a 12# Motiv Primal Fear drilled tomorrow or Sat and the starting differential on it is .040 and I require more differental than some people do.

http://www.motivbowling.com/products/balls/primal-fear.html

Usually a 1" diameter hole, 3" deep (could be a bit wider and a bit deeper) is needed to affect most cores. That removes about an ounce, roughly, I believe. I'd try to get a ball with a top weight that will leave at least an ounce remaining after you drill your finger & thumb holes.

Strapper_Squared · « **Reply #7 on:** November 03, 2016, 06:59:44 PM »

Do 12# have dynamic cores?

ignitebowling · « **Reply #8 on:** November 03, 2016, 08:40:08 PM »

Move the pin above the fingers instead of below.

Brickguy221 · « **Reply #9 on:** November 03, 2016, 10:34:23 PM »

Quote from: Strapper_Squared on November 03, 2016, 06:59:44 PM

Do 12# have dynamic cores?

They do in all Motiv balls. Same shape as heavier balls, but a bit less dense.

Brickguy221 · « **Reply #10 on:** November 03, 2016, 10:41:02 PM »

Quote from: ignitebowling on November 03, 2016, 08:40:08 PM

Move the pin above the fingers instead of below.

I am thinking about doing that instead of below fingers. Will that help increase the differential in addition to a P3 or P4 hole???

charlest · « **Reply #11 on:** November 04, 2016, 06:41:02 AM »

Quote from: Brickguy221 on November 03, 2016, 10:41:02 PM

Quote from: ignitebowling on November 03, 2016, 08:40:08 PM
Move the pin above the fingers instead of below.

I am thinking about doing that instead of below fingers. Will that help increase the differential in addition to a P3 or P4 hole???

Yes, but I assume you had a reason for putting the pin below the ring finger.
Pin above (smaller VAL angle) will always have a larger RG Differential and intermediate differential than a pin under (larger VAL angle), put it will also have a different ball reaction.

ignitebowling · « **Reply #12 on:** November 04, 2016, 07:48:24 AM »

Quote from: charlest on November 04, 2016, 06:41:02 AM

Quote from: Brickguy221 on November 03, 2016, 10:41:02 PM
Quote from: ignitebowling on November 03, 2016, 08:40:08 PM
Move the pin above the fingers instead of below.

I am thinking about doing that instead of below fingers. Will that help increase the differential in addition to a P3 or P4 hole???

Yes, but I assume you had a reason for putting the pin below the ring finger.
Pin above (smaller VAL angle) will always have a larger RG Differential and intermediate differential than a pin under (larger VAL angle), put it will also have a different ball reaction.

The bowler is more concerned about the changing/increasing of diff to the point of adding weightholes on a ball to increase a number based off the perception of that number then the reaction of the ball. If adding a weighthole to a pin down ball because it increases diff versus factoring in the change in shape of ball reaction why worry about pin up or pin down if the diff is the bigger concern.

I typically focus on pin to pap distance to control flare and adjust from there not if it is pin up or down. Since this person is not likely to drill the ball and try it out as is to see what kind of flare separation the ball has and instead add a flare increasing weighthole I say so be it.

Most bowlers with two identical bowling balls from a manufacture and if were told one has a diff of .040 and the other .050 if asked if there is a difference in ball reaction the vast majority would say yes.......they do not know any better. Most bowlers will also not see a big difference on ball reaction on most house shots because of the condition. It blends everything out.

Good Times Good Times · « **Reply #13 on:** November 04, 2016, 08:02:21 AM »

Quote from: ignitebowling on November 04, 2016, 07:48:24 AM

The bowler is more concerned about the changing/increasing of diff to the point of adding weightholes on a ball to increase a number based off the perception of that number then the reaction of the ball. If adding a weighthole to a pin down ball because it increases diff versus factoring in the change in shape of ball reaction why worry about pin up or pin down if the diff is the bigger concern.

I typically focus on pin to pap distance to control flare and adjust from there not if it is pin up or down. Since this person is not likely to drill the ball and try it out as is to see what kind of flare separation the ball has and instead add a flare increasing weighthole I say so be it.

Most bowlers with two identical bowling balls from a manufacture and if were told one has a diff of .040 and the other .050 if asked if there is a difference in ball reaction the vast majority would say yes.......they do not know any better. Most bowlers will also not see a big difference on ball reaction on most house shots because of the condition. It blends everything out.

Truth. A+

lefty50 · « **Reply #14 on:** November 04, 2016, 09:42:00 AM »

Gentlemen, respectfully, Brick is 100% justified in his question and probably faces the same problem I do each night. I have tried far too many balls in my life, and the facts remain. Higher differential has tremendous benefits for low rev players like myself, as does a change in Rg. If I had the proverbial nickel for every time I had to listen to a physics demonstration and then observe how bowling "physics" change every 2-3 years... Sigh. Understanding physics requires understanding the interrelationships as well as the principles. Yes, I know I'll catch hell from this board, as is typical. But his question is still valid, and your misapplication of lower rev impact on the relationship between engine and tire is still evident. Coverstock and shape are important, absolutely, but they have a decreasing effect on a lower rev player who doesn't have the "engine". Differential is what helps that engine get the tires moving so they can more effectively be utilized. Why can no one figure that out except those of us who experience it? Wait, I answered my own question...

Author Topic: How to Raise the Differential???? (Read 6032 times)

Brickguy221

How to Raise the Differential????

Wolfstrike

Re: How to Raise the Differential????

charlest

Re: How to Raise the Differential????

charlest

Re: How to Raise the Differential????

TWOHAND834

Re: How to Raise the Differential????

Brickguy221

Re: How to Raise the Differential????

charlest

Re: How to Raise the Differential????

Strapper_Squared

Re: How to Raise the Differential????

ignitebowling

Re: How to Raise the Differential????

Brickguy221

Re: How to Raise the Differential????

Brickguy221

Re: How to Raise the Differential????

charlest

Re: How to Raise the Differential????

ignitebowling

Re: How to Raise the Differential????

Good Times Good Times

Re: How to Raise the Differential????

lefty50

Re: How to Raise the Differential????