Thread: Odd findings.
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Old 04-06-2014, 01:22 AM   #3 (permalink)
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Tried to block the lower opening on the sides to prevent some excess flow into the engine bay and the pieces I was using was just enough to block the excess air, but not enough to reduce intake into the radiator.
What vehicle? Which opening? Ventilation slots?

Over how many miles was the 4% improvement? It could just be that the engine is warming up faster. In any case, safety first.
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