It was about 60 degrees out that day, the thermometer inside his filter box showed 80 degrees even after the car had sat for awhile. When the cooler was turned on it dropped to 40 degrees. Just because it's 60 outside doesn't mean the air in your filter box is 60 degrees too. Especially after running the car and the engine warms up.
I'll find out what kind of difference the cooler makes if I can contact the guy. I know he made a few runs without it then turned it on for a few to see what kind of difference it actually made.
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