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Discussion Starter #1
would colder air make a car run leaner

earlier this year it just seemed lean with temps 40-50 degrees

but as it got hotter 80-90 it seemed fine

gonna take her out tomorrow temps will be real cool so i am thinking about jettin her up a lil bit
 

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Yes, usually colder air is denser= more 02 per volume so throw two size jet at it and see what happens, if it picks up put more in and so on until it slows then go back to the sweet spot. Mph only not et is how you tune
 
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