Has anyone tried this layout and had success?  I have a teammate, who is a high speed lower track player.  He always uses the most aggressive equipment, and sometimes even that is not enough.  I was thinking about drilling him something with a double thumb, but don't want to have it burn up and fizzle on the backend.  I was wondering if anyone had any experience or could list some pros and cons of this layout?

Thanks,

Drew

+1 on the oil requirement!

 I have tried it on 2 balls, Clutch and Green Mamba.

Clutch(box finish) had a bad habit of burning up if I got it to the friction too early, and seemed to skid polished. I tried different surfaces-unsatisfied. I believe the core was not strong enough. Lesson learned! Also has a higher RG and lower Diff.

Green Mamba(1500 finish)-seems like the perfect combination of core/cover for the DT for me. Just enough cover with a big core. Low RG and higher Diff.

I have given you a lot of variables when considering this drilling. First and foremost check with a SEASONED pro shop! They can give you alot more information on trying this drilling and whether it will work for you style/rev rate.   

I hope this helps, don

Thanks for the replies.  I am his driller, though "seasoned" might be a stretch.  I'm an engineer by trade, and have a decent amount of knowledge in the area, but I don't do this for a living, so I am always learning.  Besides, I have talked to a few different "seasoned" drillers, and there is always disagreement.

The bowler in question has a rev rate in the high 200's (Estimated), but the speed off his hand is probably close to 20 mph.  He is a  big guy 6' 4" 260, and tends to sling it down the lane.  He also has a smaller track and thus more tilt.  The tilt and speed are what I think  get his ball down the lane without picking up too early.  He is an older fellow who grew up in the urethane days, and tends to like that reaction shape (Banana, not hockey stick).

The drier it gets, the harder he throws it.  I am not trying to change his release or style, so that really isn't an option at this point.  I know there are things he can be doing to get better, but at this point change would be difficult, since he never practices.

I figure that the double thumb in general creates the highest differential of any drilling (Flare potential).  I was going to try it on an AMF incinerate, but like others have noted, am afraid it might cause the ball to burn up early.

He has had success with the Track 912T that I drilled for him last, and with an AMF Mega Recovery.  I think those were his two favorites.  Off the top of my head, I would say that those balls were drilled about 25 - (4 or 4.5) - 50.  High tilt players need smaller ratios (drill angle to val angle) if you believe Mo, and that site.

I think it will work out for him, but I just wanted to understand if there are any caveats, or things to be careful about.

I suppose if it does burn up early, I can always take some surface off.

Thanks to everyone who has replied, and if anyone has anything else to add, that would be great.

Drew

With his combination of speed and revs I don't think you have to worry about his ball burning up unless he's playing a really dry part of the lane.  If that's the case he needs education on lane play.  --  JohnP

It would be 20 mph off his hand.  I measured with a video camera ... counting frames.

Some nights he does point the ball, when there is more oil. 

Thanks for the input everyone, I am going to give it a try and see how it works out.

Drew

I really think people over use the "burning up" argument. Is the ball speed what the monitors are saying? If that is the case, that is his ball speed down lane, after the ball has already slowed down. That is TOO high for his rev rate, and near impossible for his ball to "burn up". What is happening, is his ball is never slowing down enough to pick up a roll, and create traction in the back-ends, and thus create roll through the pins.

Bowlers with very high rev rates are the ones who get the ball to flare out (burn up as some like to say) before it gets to the dry part of the lane. The ball actually hooks out, and doesn't have anything left to help it change direction on the drier back-ends. A bowler who throws the ball at over 20mph, with less than 300 rev rate, won't see this happen. Use surface to get the ball to slow down, and thus continue through the proper roll phases that it needs to go through in order to react properly.

Sometimes, a bowler has to come to terms with the fact that they just don't have the proper rotation for their ball speed, and they are not going to get hook unless they slow the ball down, to better match their rev rate. Conversely, throwing the ball TOO slow for the players rev rate, is just as bad.

The other thing is, high speed, lower rev rate players have to keep their angles in front of them. Sometimes, they just have to go at the pocket, and can't give away the pocket.