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Old 06-18-2017, 02:59 PM   #41 (permalink)
It's all about Diesel
 
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An electric fan is a cost-effective measure to improve fuel-efficiency and also leads to shorter warm-up times, which is good for the sake of emissions control too.

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Old 06-18-2017, 03:17 PM   #42 (permalink)
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2400rpm is about 70mph in my van, it was ~2900rpm before the swap to larger rear tires. That's a good point about the forward air pressure, it might not make a big difference at highway speeds. At low speed acceleration I can see it being a big difference. I'll have to put a vacuum tube out just in front of the radiator to see the pressure there at highway speeds. I haven't tried that yet...

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