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Booster Science

0511Phr Carb 14 Z
A little detailing, as shown... 
   
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0511Phr Carb 14 Z
A little detailing, as shown here, can result in a 10-20 percent increase in booster signal...
0511Phr Carb 15 Z
...Do not remove material... 
   
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0511Phr Carb 15 Z
...Do not remove material from the OD of the booster to produce the sharp edge because this encourages air to pass outside the booster where it will do nothing to enhance the signal...
0511Phr Carb 16 Z
...Here are before and after... 
   
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0511Phr Carb 16 Z
...Here are before and after shots of this simple cleanup process.
0511Phr Carb 17 Z
Here is a $1,500 Nextel Cup... 
   
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0511Phr Carb 17 Z
Here is a $1,500 Nextel Cup Holley. Note the detail work to remove all casting imperfections around and into the main venturi. In addition, the dogleg boosters have had the legs streamlined and the booster's venturi edges sharpened.
0511Phr Carb 18 Z
By machining a step in the... 
   
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0511Phr Carb 18 Z
By machining a step in the underside of a dogleg booster (drawing) the fuel shearing action is increased. This provides for better atomization of the fuel...
0511Phr Carb 19 Z
...The photo shows a non-stepped... 
   
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0511Phr Carb 19 Z
...The photo shows a non-stepped and a stepped down-leg booster. Holley offers both down-leg and annular discharge boosters with this step already machined in.
Holley Performance Products
P.O. Box 10360
1801 Russellville Rd.
Bowling Green
KY  42102-7360
(270) 782-2900

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