Keep up the good work. Its amazing how many people replied without any dyno of their own to show different results... All theory!
I am having trouble with allowing enough air in a cold air box setup using a K&N filter. The car a 3.4 ltr Boxster can't produce any power above 4000 rpm with the air filter but its goes like a rocket with the air filter removed.
I have been asking K&N for assistance with no response from Tech department.
I have 3.5 inch tubing from the TB to the approximate former location of the stock air box that has been replaced with an aluminium shaped cold air intake drawing air from the side vent. The filter I have is cone shaped with a filter on the sides and at the end of the cone rather than having a typical end cap. RX something as I am on vacation and don't have the number with me.
I am looking for a filter that will allow enough air to the motor 3.4 ltr headers and free flow exhaust system.
Thanks
catmanluge
