Would someone, who is smarter than me explain how the installation of a K & N air filter on an 05-07 Mustang GT can advertise more horsepower, yet those of us who installed a CDC Shaker System with Cold Air Induction are getting no increase in horse power.

It makes no sense to me. It would seem the engine would breath better with air being forced into the throttle body with a hood scoop vs. an open air K & N with no additional forced air.

I simply don't get it...........

 

The Shaker hoodscoop does nothing for forcing air into the throttle body, that should be pretty obvious by looking at all the reversed duct work. Short Ram intakes, even the less than desirable (IMO) K&N does better than the stock box because the restriction is reduced.

-Dan

 

Though you can duct the CDC Shaker to feed more cool air to your CAI.

 

That's exactly what I did. However, IMO all the bends and restrictions in the plumbing pretty much negated any "ram air" effect. I'm sure some ambient air made it to the CAI, but not enough to make any measurable difference. These were taken last August right after I installed the Shaker.

 

The stock airbox (or any CAI with a heat shield) is not a closed/sealed system. Any 'ram air' pressure from the Shaker is equalized immediately. Essentially, it just provides some cooler air at higher speeds.

The K&N is a low restriction air filter that increasing the airflow into the engine. thus making more power.