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Does an open air intake increase or decrease economy?

771 views 8 replies 6 participants last post by  yogi_9000cse 
#1 ·
I know more air = more fuel but this is a forced induction engine and I am not sure if the less restrictive intake will make the engine more efficient instead. This is the small metal tube with the k&n on the end sold by genuinesaab

What is the general consensus on this?
 
#3 ·
Very slight improvement in economy. Less restriction = less friction to draw in air. given the large volumes of air that pass through the engine, this will have an effect, however small on the the economy.
(this assumes all else is equal and the ECU makes the most of the situation)
 
#4 ·
I am just trying to decide weather to roll back to the stock air silencer since the open air is just too loud for me to be honest and takes away from the elegant character of the vehicle but I am on the fence about it so a slight increase in economy is all I would need to stay put with it.
 
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