The Oil Ratio has to do with how much oil is in the center of the lane vs the outside of the lane.
The bigger the ratio the more "Walled up" the shot is . You have more oil in the middle which helps keep the ball on line to the pocket and a dryer outside which gives you more recovery.
The smaller the ratio the "Flatter" the shot is and makes it harder.Without the big difference between the middle part of the lane and the outside, you don't get the recovery and the same type of hold.
Here the two are compared:
The Bourbon st. pattern has a 6.2 to 1 ratio, The Dead Mans Curve pattern has a 3 to 1 ratio.
Here you can see that Bourbon has a lot of oil in the middle and the outside relatively dry, where as Dead man the midddle and out side are closer together and the outside is wetter.
Might read this article:
click for house-shot-vs-pba-or-sport-shot/
click for Lane Pattern Basics: An Overview of Blend, Taper & Application
for more info.
You can see the Kegel Recreation Series - BOURBON STREET - 6240 pattern here:
http://www.kegel.net/V3/PatternLibra...rn.aspx?ID=712
You can see the Kegel Sport Series - DEAD MAN'S CURVE - 3043 here:
http://www.kegel.net/V3/PatternLibra...rn.aspx?ID=607
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