K&N filter cost
Joined: Mar 2004
Posts: 12
Likes: 0
RE: K&N filter cost
I was told by my local supplier to stay away from the FIPK. He told me he could sell it to me but he has never seen much difference for the buck. Told me to wait cause other companies make the same type of intake but seem to show more increases for less money. I have never used it but this is just what I was told. K&N filter though is definately worth it. Won't go without one anymore.
Professional
Joined: Dec 2003
Posts: 177
Likes: 1
From: United States
RE: K&N filter cost
Lots of people falsely perceive the louder sound of an intake (like the K&N FIPK) actually means more horsepower. The same applies for a louder exhaust.
The noise that leads some to believe that the revised intake plumbing is less restrictive may be deceptive, too. Most (all?) stock intake systems have a Helmholtz resonator tuned 180 degrees to the normal intake pulsations. These resonators don't materially reduce flow - they just cancel noise.
On the 3g Rams both 4.7 and 5.7, Dodge enlarged their air filter and the box it is enclosed in. The new larger design is quite free flowing and the expense of a $250.00 plus intake is actually a waste of money. Even after the big intake war (360 air vs Airram) on a 5.7 Hemi, the hp improvement was less than 5 hp.
Their has been some discussion on other Dodge boards about the Hemi's computer actually cancelling out any gains made by an intake. Being that the stock intake is actually tuned to the runners means an aftermarket intake or even a K&N drop-in will not give you any noticeable gains. Read the article from Popular Hot Rodding regarding the Hemi at the bottom of this thread .
Now, those that have the venerable 5.2/5.9 with the small air box/filter, will notice better gains when switching to a larger filter or an intake system.
To further muddy the waters, consider the effect of the K&N on your engine: http://theoildrop.server101.com/ubb/...;f=15;t=000175
http://theoildrop.server101.com/ubb/...;f=15;t=000209
http://theoildrop.server101.com/ubb/...;f=15;t=000025
Popular Hot Rodding Article regarding the Hemi
"The intake manifold itself met some pretty steep design criteria. Not the least was that it must not cause an excessive restriction to airflow. This requirement had to be met while keeping noise to a minimum and packaging the whole deal as compactly as possible. The resulting intake looks like a work of art for the end user and a nightmare for the tool and die maker. The system has a tuned length from the filter to the plenum and from here each port runner to valve is a tuned length. Computer modeling and dyno testing has allowed the ports, plenum and filter-to-plenum runner length and diameter/volume to be sized near optimally for a wide power band consistent with street performance needs. The end product proved capable of delivering cooler air than an aluminum manifold while only restricting the intake port 10 percent at full valve lift. That is about the same as a good aftermarket performance intake.
Unlike an LS6, which has a mass air system that allows the computer to adjust the fuel flow for any given airflow so that the mixture is always right (theoretically at least), the Hemi has a speed density system. This means that any increase in airflow into the engine goes unseen by the rest of the system. If a modification is done that increases mass airflow, such as a cold-air package, the computer has to be reprogrammed accordingly. Fortunately, two companies, Squier Inc and Street & Performance are working on this now and already have what is needed for transplants of the Hemi into other vehicles."
Another brand option for a drop-in filter: http://www.amsoil.com/products/ts.html
In closing, don't believe all the marketing hype about gains in HP and mileage coming from the intake manufacturers.
Bill,
The noise that leads some to believe that the revised intake plumbing is less restrictive may be deceptive, too. Most (all?) stock intake systems have a Helmholtz resonator tuned 180 degrees to the normal intake pulsations. These resonators don't materially reduce flow - they just cancel noise.
On the 3g Rams both 4.7 and 5.7, Dodge enlarged their air filter and the box it is enclosed in. The new larger design is quite free flowing and the expense of a $250.00 plus intake is actually a waste of money. Even after the big intake war (360 air vs Airram) on a 5.7 Hemi, the hp improvement was less than 5 hp.
Their has been some discussion on other Dodge boards about the Hemi's computer actually cancelling out any gains made by an intake. Being that the stock intake is actually tuned to the runners means an aftermarket intake or even a K&N drop-in will not give you any noticeable gains. Read the article from Popular Hot Rodding regarding the Hemi at the bottom of this thread .
Now, those that have the venerable 5.2/5.9 with the small air box/filter, will notice better gains when switching to a larger filter or an intake system.
To further muddy the waters, consider the effect of the K&N on your engine: http://theoildrop.server101.com/ubb/...;f=15;t=000175
http://theoildrop.server101.com/ubb/...;f=15;t=000209
http://theoildrop.server101.com/ubb/...;f=15;t=000025
Popular Hot Rodding Article regarding the Hemi
"The intake manifold itself met some pretty steep design criteria. Not the least was that it must not cause an excessive restriction to airflow. This requirement had to be met while keeping noise to a minimum and packaging the whole deal as compactly as possible. The resulting intake looks like a work of art for the end user and a nightmare for the tool and die maker. The system has a tuned length from the filter to the plenum and from here each port runner to valve is a tuned length. Computer modeling and dyno testing has allowed the ports, plenum and filter-to-plenum runner length and diameter/volume to be sized near optimally for a wide power band consistent with street performance needs. The end product proved capable of delivering cooler air than an aluminum manifold while only restricting the intake port 10 percent at full valve lift. That is about the same as a good aftermarket performance intake.
Unlike an LS6, which has a mass air system that allows the computer to adjust the fuel flow for any given airflow so that the mixture is always right (theoretically at least), the Hemi has a speed density system. This means that any increase in airflow into the engine goes unseen by the rest of the system. If a modification is done that increases mass airflow, such as a cold-air package, the computer has to be reprogrammed accordingly. Fortunately, two companies, Squier Inc and Street & Performance are working on this now and already have what is needed for transplants of the Hemi into other vehicles."
Another brand option for a drop-in filter: http://www.amsoil.com/products/ts.html
In closing, don't believe all the marketing hype about gains in HP and mileage coming from the intake manufacturers.
Bill,