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Old 04-30-2018, 10:42 AM   #11
Weldangrind   Weldangrind is offline
 
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Join Date: Mar 2009
Location: Sardis, BC, Canada
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The general idea is that as the temperature drops, air becomes more dense, therefore requiring more fuel. As the temperature increases and air becomes "thinner", you'll need less fuel. Let's say you're using a 25 slow jet during temperatures above 70F; you might increase to a 27.5 or 30 if it drops to around 32F. Similar logic applies to the main jet.
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