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Cobra Forums
2013-14 Shelby GT500
10% Lower + 2.5 Upper on a '13
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<blockquote data-quote="Catmonkey" data-source="post: 15603590" data-attributes="member: 124025"><p>The ATI 10% with a 2.5" will be a 5.6% increase in blower speed over the stock lower and a 2.4". The 10% with a 2.6" is a 1.5% increase in blower speed. Generally a .1" decrease in pulley size is a 1-1.5 psi increase and ~4% increase in blower speed. I'd err on the side of being under the "edge". In fact, my current setup is the 10% and the 2.6".</p></blockquote><p></p>
[QUOTE="Catmonkey, post: 15603590, member: 124025"] The ATI 10% with a 2.5" will be a 5.6% increase in blower speed over the stock lower and a 2.4". The 10% with a 2.6" is a 1.5% increase in blower speed. Generally a .1" decrease in pulley size is a 1-1.5 psi increase and ~4% increase in blower speed. I'd err on the side of being under the "edge". In fact, my current setup is the 10% and the 2.6". [/QUOTE]
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2013-14 Shelby GT500
10% Lower + 2.5 Upper on a '13
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