Quote:
Originally Posted by citcapp
It was a common trait to turn the lid on the air cleaner unside down when you went to the track, it allowed more air into the carb was the thought at the time. This was before the auto manufactures thought about induction aircleaners.
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The problem is that flipping the lid causes the engine to ingest warm underhood air and defeats the whole purpose of the under-bumper scoops. There's about a 1 hp increase for every 7 degree decrease in inlet temp.